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at 22:57:41 ut, the swift burst alert telescope (bat) triggered and located grb 200716c (trigger=982707). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 196.013, +29.630 which is ra(j2000) = 13h 04m 03s dec(j2000) = +29d 37' 47" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 200716c: swift detection of a burst with an optical counterpart |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 190731a (ohno et al. gcn circ. 25244), collecting 5.0 ks of photon counting (pc) mode data between t0+33.4 ks and t0+62.9 ks. eleven uncatalogued x-ray sources are detected, of which one ("source 1") is fading with 3-sigma significance, ... | grb 190731a: swift-xrt afterglow detection |
at 20:15:42 ut, the swift burst alert telescope (bat) triggered and located possible grb 180510b (trigger=831816). due to an observing constraint swift did not slew immediately to the burst. the bat on-board calculated location is ra, dec 77.989, -62.335 which is ra(j2000) = 05h 11m 57s dec(j2000) = -62d 20' 05" with a... | grb 180510b: swift detection of a burst with an optical counterpart |
at 14:36:06 ut, the swift burst alert telescope (bat) triggered and located grb 191017b (trigger=929981). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 245.151, -73.561 which is ra(j2000) = 16h 20m 36s dec(j2000) = -73d 33' 40" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 191017b: swift detection of a burst |
many of the most energetic phenomena in the universe can be seen by radio telescopes and are transient in nature. recent scientific and technological advancements have enabled the breakthrough detections of two new types of exciting transient: fast radio bursts (frbs) and neutron star mergers. this thesis focuses on de... | fast radio bursts and the radio counterparts of neutron star mergers |
at 02:00:27 ut, the swift burst alert telescope (bat) triggered and located grb 210210a (trigger=1031728). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 262.811, +14.648 which is ra(j2000) = 17h 31m 15s dec(j2000) = +14d 38' 53" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210210a: swift detection of a burst with an optical counterpart |
at 06:47:17 ut, the swift burst alert telescope (bat) triggered and located grb 200509a (trigger=970886). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 116.450, -4.641 which is ra(j2000) = 07h 45m 48s dec(j2000) = -04d 38' 28" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 200509a: swift detection of a burst with a possible optical counterpart |
at 12:59:59.42 ut, the swift burst alert telescope (bat) triggered and located grb 190828b (trigger=922808). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 251.818, 27.237 which is ra(j2000) = 16h 47m 16s dec(j2000) = +27d 14' 12" with an uncertainty of 3 arcmin (radius, 90% cont... | grb 190828b: swift detection of a burst |
the optical afterglow (atel #12824; gcn #24680; gcn #24684; gcn #24686; gcn #24687; gcn #24688; gcn #24690; gcn #24693; gcn #24697; gcn #24698; gcn #24700; gcn #24703; gcn #24708) of the bright grb 190530a (gcn #24676, gcn #24677; gcn #24679; gcn #24678, gcn #24683) is marginally detected on the stacked sloan-r band cc... | photometry of the optical afterglow of grb 190530a |
at 19:13:38 ut, the swift burst alert telescope (bat) triggered and located grb 221027b (trigger=1131397). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 225.603, +47.448 which is ra(j2000) = 15h 02m 25s dec(j2000) = +47d 26' 53" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 221027b: swift detection of a burst |
swift-xrt has performed follow-up observations of the swift/bat-guano-detected burst grb 221215a, collecting 2.8 ks of photon counting (pc) mode data between t0+97.3 ks and t0+113.8 ks. no x-ray sources have been detected consistent with being within 296 arcsec of the swift/bat-guano position. the 3-sigma upper limit i... | grb 221215a: swift-xrt observations |
at 14:49:24 ut, the swift burst alert telescope (bat) triggered and located sgr 1830-0645 or grb 201010a (trigger=999571). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 277.675, -6.758, which is ra(j2000) = 18h 30m 42s dec(j2000) = -06d 45' 30" with an uncertainty of 3 arcmin (r... | swift detection of a new sgr 1830-0645 or a short grb 201010a |
at 09:22:50 ut, the swift burst alert telescope (bat) triggered and located grb 220926a (trigger=1125354). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 245.011, -16.043 which is ra(j2000) = 16h 20m 03s dec(j2000) = -16d 02' 32" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 220926a: swift detection of a burst |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 210704a (berretta et al. gcn circ. 30375), collecting 2.6 ks of photon counting (pc) mode data between t0+53.5 ks and t0+61.1 ks. an uncatalogued x-ray source is detected and is above the 2sxps 3-sigma upper limit at this position, and i... | grb 210704a: swift-xrt afterglow detection |
short-duration gamma-ray bursts (grbs) are brief flashes of high-energy emission lasting less than two seconds. these events have long been hypothesized to occur when two neutron stars spiral in and collide, launching enormously powerful jets of light and matter. can we now definitively make this connection?a singular ... | uniting short gamma-ray bursts and neutron star mergers |
at 17:16:23 ut, the swift burst alert telescope (bat) triggered and located grb 220325a (trigger=1099310). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 269.485, -7.031 which is ra(j2000) = 17h 57m 56s dec(j2000) = -07d 01' 50" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 220325a: swift detection of a burst |
at 04:52:58 ut, the swift burst alert telescope (bat) triggered and located grb 220701a (trigger=1114034). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 242.478, +55.420 which is ra(j2000) = 16h 09m 55s dec(j2000) = +55d 25' 14" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 220701a: swift detection of a burst |
at 11:11:17 ut, the swift burst alert telescope (bat) triggered and located grb 210205a (trigger=1030629). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 347.257, +56.312 which is ra(j2000) = 23h 09m 02s dec(j2000) = +56d 18' 45" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210205a: swift detection of a burst |
at 21:39:44 ut, the swift burst alert telescope (bat) triggered and located grb 210209a (trigger=1031636). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 328.096, +43.559 which is ra(j2000) = 21h 52m 23s dec(j2000) = +43d 33' 31" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210209a: swift detection of a burst |
at 11:42:54 ut, the swift burst alert telescope (bat) triggered and located grb 200713a (trigger=982201). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 76.962, -32.825, which is ra(j2000) = 05h 07m 51s dec(j2000) = -32d 49' 30" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 200713a: swift detection of a burst |
at 07:58:20 ut, the swift burst alert telescope (bat) triggered and located igr j16418-4532 (trigger=1073821). swift slewed immediately to the source. the bat on-board calculated location is ra, dec 250.455, -45.540 which is ra(j2000) = 16h 41m 49s dec(j2000) = -45d 32' 22" with an uncertainty of 3 arcmin (radius, 90% ... | swift trigger 1073821: detection of igr j16418-4532 |
at 16:41:56 ut, the swift burst alert telescope (bat) triggered and located grb 180623a (trigger=844015). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 214.511, -60.294, which is ra(j2000) = 14h 18m 03s dec(j2000) = -60d 17' 38" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 180623a: swift detection of a burst |
we observed the field of the short grb 230217a (moss et al. gcn circ. 33339) with the eso/vlt equipped with the fors2 instrument. a series of optical images has been obtained with the i filter on 2023 february 20 (i.e. about 2.5 days after the burst) and on 2023 february 23 (i.e. about 5.5 days after the burst). image ... | grb 230217a: vlt/fors2 optical observations and candidate counterpart |
at 17:38:00 ut, the swift burst alert telescope (bat) triggered and located grb 210820a (trigger=1069551). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 20.629, +4.632 which is ra(j2000) = 01h 22m 31s dec(j2000) = +04d 37' 55" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 210820a: swift detection of a burst with an optical counterpart |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 220831a (tohuvavohu et al. gcn circ. 32506), collecting 5.0 ks of photon counting (pc) mode data between t0+51.2 ks and t0+78.8 ks. no x-ray sources have been detected consistent with being within 98 arcsec of the swift/bat position. the... | grb 220831a: swift-xrt observations |
at 21:08:03 ut, the swift burst alert telescope (bat) triggered and located grb 191101a (trigger=932742). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 251.844, +43.754 which is ra(j2000) = 16h 47m 23s dec(j2000) = +43d 45' 15" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 191101a: swift detection of a burst |
we report the discovery of the fast optical transient ztf21aagwbjr/at2021buv with the zwicky transient facility (ztf, bellm et al. 2019, graham et al. 2019) at coordinates (j2000, <0.5"): ra = 07:48:19.32 (117.08054d) dec = +11:24:34.21 (+11.40949d) ztf21aagwbjr was first detected at r=17.11 mag on 2021-02-04 07:07 ... | ztf21aagwbjr/at2021buv: ztf discovery of a fast optical transient likely associated with grb 210104a |
at 08:11:21 ut, the swift burst alert telescope (bat) triggered and located the soft gamma repeater sgr 1830-0645 (trigger=1033144). swift slewed immediately to the source. the bat on-board calculated location is ra, dec 277.646, -6.735 which is ra(j2000) = 18h 30m 35s dec(j2000) = -06d 44' 05" with an uncertainty of 3... | swift trigger 1033144: detection of sgr 1830-0645 |
the circumgalactic medium (cgm) is the site of various galactic phenomena such as galactic winds, outflows, accretion flows, and recycling flows. recent space- and ground-based studies of the circumgalactic medium (cgm) using bright background quasars have revealed a dynamic interplay between the galaxy ecosystem and s... | cgm-grb: studying the circumgalactic medium around grb hosts at z > 2 |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 211107b (swift/bat did not successfully trigger on grb 211107b et al. gcn circ. 31057), collecting 1.7 ks of photon counting (pc) mode data between t0+124.3 ks and t0+131.0 ks. one uncatalogued x-ray source has been detected consistent w... | grb 211107b: swift-xrt observations |
at 16:18:51 ut, the swift burst alert telescope (bat) triggered and located grb 220117a (trigger=1093592). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 91.578, -28.410 which is ra(j2000) = 06h 06m 19s dec(j2000) = -28d 24' 35" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 220117a: swift detection of a burst |
we present a numerical model for calculation of spectra of synchrotron-self-compton radiation sources, e.g., gamma-ray bursts and tev blazars. the model implements sequential allowance of the compton scattering and two-photon production of electron-positron pairs using precise quantum-electrodynamic expressions for the... | numerical model of synchrotron-self-compton radiation sources |
swift-xrt has performed follow-up observations of the swift/bat-guano detected burst grb 210606a (james delaunay et al. gcn circ. 30134), collecting 7.3 ks of photon counting (pc) mode data between t0+62.3 ks and t0+385.7 ks. four uncatalogued x-ray sources are detected consistent with being within 394 arcsec of the sw... | grb 210606a: swift-xrt afterglow detection |
at 17:40:33 ut, the swift burst alert telescope (bat) triggered and located grb 220319a (trigger=1098132). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 218.207, +61.289 which is ra(j2000) = 14h 32m 50s dec(j2000) = +61d 17' 20" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 220319a: swift detection of a burst |
at 21:16:47 ut, the swift burst alert telescope (bat) triggered and located a new sgr (trigger=960986). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 274.471, -16.102 which is ra(j2000) = 18h 17m 53s dec(j2000) = -16d 06' 05" with an uncertainty of 3 arcmin (radius, 90% containm... | swift-bat trigger 960986: swift detection of a new sgr swift j1818.0-1607 |
at 15:50:37 ut, the swift burst alert telescope (bat) triggered and located grb 180620b (trigger=843211). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 357.517, -57.957 which is ra(j2000) = 23h 50m 04s dec(j2000) = -57d 57' 25" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 180620b: swift detection of a burst with an optical counterpart |
the rapid infrared imager/spectrograph (rimas) is an instrument designed to observe gamma ray burst afterglows in the near infrared between 0.9 and 2.4 μm. dispersion in the moderate resolution mode (r~4000) is provided by a pair of znse grisms: one covering the y and j bands and the other covering the h and k. llnl di... | a second set of znse grisms for the rapid infrared imager/spectrograph (rimas) |
the rapid imager - spectrometer (rimas) will study the afterglow of gamma-ray bursts in the near-infrared. in order to produce useful astronomical data, rimas must be calibrated to establish what wavelength corresponds to each pixel on the spectrometer's h2rg detectors. in the first phase of this study, several methods... | exploration of the calibration and development of the spectral extraction procedure for the rapid imager - spectrometer |
at 15:04:36 ut, the swift burst alert telescope (bat) triggered and located grb 210901a (trigger=1071488). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 295.292, -76.932 which is ra(j2000) = 19h 41m 10s dec(j2000) = -76d 55' 55" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210901a: swift detection of a burst |
at 21:29:28 ut, the swift burst alert telescope (bat) triggered and located grb 221120a (trigger=1141030). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 41.3225 43.1970 which is ra(j2000) = 02h 45m 17s dec(j2000) = 43d 11' 49" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 221120a: swift detection of a likely short burst |
at 15:36:18 ut, the swift burst alert telescope (bat) triggered and located grb 180613a (trigger=840853). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 211.562, -43.076 which is ra(j2000) = 14h 06m 15s dec(j2000) = -43d 04' 31" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 180613a: swift detection of a burst |
we perform two dimensional mhd cellular automata simulations for a two-dimensional model of a magnetized flux tube with a background flow. self organized criticality is reached by the system. the lifetime distribution and energy emission as a function of time are discussed regarding an application of the model to x-ray... | mhd cellular automata simulations: application to grb x-ray afterglows |
swift-xrt has performed follow-up observations of the fermi/gbm and swift/bat-guano detected burst grb 201008a (delaunay et al. gcn circ. 28583), collecting 4.5 ks of photon counting (pc) mode data between t0+46.9 ks and t0+60.1 ks. two uncatalogued x-ray sources have been detected consistent with being within 296 arcs... | grb 201008a: swift-xrt observations |
we present the discovery of a slowly-evolving, extragalactic radio transient, first j141918.9+394036, identified by comparing a catalog of radio sources in nearby galaxies against new observations from the very large array sky survey. analysis of other archival data shows that first j141918.9+394036 faded by a factor o... | discovery of the luminous, decades-long, extragalactic radio transient first j141918.9+394036 |
at 15:03:43 ut, the swift burst alert telescope (bat) triggered and located grb 210610a (trigger=1054627). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 204.285, +14.480 which is ra(j2000) = 13h 37m 08s dec(j2000) = +14d 28' 49" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210610a: swift detection of a burst with an optical counterpart |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 220627a (di lalla et al. gcn circ. 32283), collecting 4.9 ks of photon counting (pc) mode data between t0+44.3 ks and t0+148.8 ks. fourteen uncatalogued x-ray sources are detected, of which one ("source 3") is fading with >3-sigma sig... | grb 220627a: swift-xrt afterglow detection |
at2023lcr is a recently discovered fast-fading red transient with multi-wavelength observations consistent with a typical long gamma-ray burst (grb) afterglow at redshift 1.0272. however, no gamma-ray prompt emission was detected in the direction of the transient. goto observations constrained the window of possible pr... | determining the jet collimation of the dirty fireball grb candidate at2023lcr |
swift-xrt has performed follow-up observations of the swift/bat-guano-detected burst grb 210626a (aaron tohuvavohu et al. gcn circ. 30325), collecting 1.4 ks of photon counting (pc) mode data between t0+29.7 ks and t0+31.1 ks. an uncatalogued x-ray source is detected and is above the 2sxps 3-sigma upper limit at this p... | grb 210626a: swift-xrt afterglow detection |
swift-xrt has performed follow-up observations of ztf21aagwbjr (kool et al., 29405), which may be related to the fermi/gbm / gecam / ipn detected burst grb 210204a (gcn circ., 29390, gcn circ. 29392, gcn circ. 29408), collecting 2.9 ks of photon counting (pc) mode data between t0+160.9 ks and t0+173.2 ks. an uncatalogu... | grb 210204a / ztf21aagwbjr: swift-xrt observations |
we have analysed 5.2 ks of photon counting (pc) mode xrt data for the swift-bat-detected burst grb 210618a (bernardini et al. gcn circ. 30250), collected between t0+65 s and t0+22.6 ks. three uncatalogued x-ray sources have been detected consistent with being within 296 arcsec of the swift-bat position, however none of... | grb 210618a: swift-xrt observations |
at 20:54:42 ut, the swift burst alert telescope (bat) triggered and located grb 210722a (trigger=1061223). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 27.023, -6.354 which is ra(j2000) = 01h 48m 06s dec(j2000) = -06d 21' 14" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 210722a: swift detection of a burst with a bright optical counterpart |
at 04:25:18 ut, the swift burst alert telescope (bat) triggered and located grb 210212a (trigger=1032183). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 72.261, +7.234 which is ra(j2000) = 04h 49m 03s dec(j2000) = +07d 14' 01" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 210212a: swift detection of a burst |
at 04:57:29 ut, the swift burst alert telescope (bat) triggered and located grb 210730a (trigger=1062150). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 149.592, +69.705 which is ra(j2000) = 09h 58m 22s dec(j2000) = +69d 42' 19" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210730a: swift detection of a burst near m82 |
in august 2017 a gravitational wave signal from a binary neutron star merger was detected for the first time, and it was followed by several electromagnetic detections that spanned the whole electromagnetic spectrum. those observations proved the ejection of two dynamical components: mildly-relativistic neutron rich ej... | jet-ejecta interactions in neutron star mergers |
grb 161219b was discovered by the swift burst alert telescope (bat) on 2016 december 19 at 18:48:39 ut. the burst duration is t90=6.94+/-0.79s. the optical afterglow was discovered by the swift uv/optical telescope (uvot) in observations beginning 112s after the bat trigger (marshall & d'ai 2016gcn.20306....1m). sp... | vizier online data catalog: multiwavelength obs. of grb 161219b (laskar+, 2018) |
grb190829a is a rare nearby (z=0.08) gamma-ray burst of long duration, followed by a bright type ic supernova. recently it was proposed that events like grb190829a could produce large amounts of heavy metals, and be the dominant sources of galactic r-process enrichment . the characteristic signature would be a long-liv... | unpicking the threads of a rare collapsar explosion |
the likely detection of gravitational waves associated with the inspiral of neutron star binaries by the upcoming advanced ligo/virgo observatories will be complemented by searches for electromagnetic counterparts over large areas of the sky by swift and other observatories. as short gamma-ray bursts (grb) are the most... | predictions for swift follow-up observations of advanced ligo/virgo gravitational wave sources |
the svom mission (space-based variable objects monitor) is a chinese-french satellite mission under development, devoted to collecting a complete sample of gamma-ray bursts (grbs) observed at multi-wavelengths with a high fraction of redshift determinations. in january 2017 the mission entered phase c, starting officia... | overview of the svom gamma-ray burst mission under development with a focus on its trigger system |
we show that the weibel or current filamentation instability can lead to the emission of circularly polarized radiation. using particle-in-cell simulations and a radiation post-processing numerical algorithm, we demonstrate that the level of circular polarization increases with the initial plasma magnetization, saturat... | magnetized current filaments as a source of circularly polarized light |
grb201214b is a weak gamma-ray burst discovered by fermi gbm and localized by swift bat close to a nearby galaxy at d~280 mpc. xrt follow-up observations do not identify any counterpart within the bat error region, showing that this event is not associated with a bright x-ray afterglow. its weak gamma-ray signal, lack ... | grb201214b: an off-axis burst in the nearby universe? |
xmm-newton carried out a target of opportunity observation of grb 231115a (mereghetti et al., gcn 35037; fermi gbm team, gcn 35035) which is likely a magnetar giant flare in the m82 galaxy (d'avanzo et al., gcn 35036; burns, gcn 35038) and was also detected by glowbug (cheung et al., gcn 35045), insight-hxmt (xue et al... | grb 231115a: xmm-newton observation |
low-luminosity gamma-ray bursts (grbs) have small isotropic equivalent gamma-ray energy and luminosity, compared with normal long grbs. grb 190829a is a member of this class. furthermore, very-high-energy gamma-rays were detected by h.e.s.s. with ∼ 20σ significance. this event had more unusual features. first, it had m... | off-axis jet scenario for early afterglow emission of low-luminosity gamma-ray burst grb 190829a |
at 10:59:30 ut, the swift burst alert telescope (bat) triggered and located grb 201229a (trigger=1015088). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 210.708, +48.197 which is ra(j2000) = 14h 02m 50s dec(j2000) = +48d 11' 50" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 201229a: swift detection of a burst with a possible optical counterpart |
at 14:44:31 ut, the swift burst alert telescope (bat) triggered and located grb 200127a (trigger=952791). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 295.204, +44.910 which is ra(j2000) = 19h 40m 49s dec(j2000) = +44d 54' 35" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 200127a: swift detection of a burst |
at 22:41:15 ut, the swift burst alert telescope (bat) triggered and located grb 200131a (trigger=953689). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 3.095, +51.124 which is ra(j2000) = 00h 12m 23s dec(j2000) = +51d 07' 25" with an uncertainty of 3 arcmin (radius, 90% containm... | grb 200131a: swift detection of a burst with an optical counterpart |
swift-xrt has performed follow-up observations of the integral/spi-acs and swift-bat guano detected possible short burst grb 200405b (james delaunay et al. gcn circ. 27497), collecting 5.0 ks of photon counting (pc) mode data between t0+66.6 ks and t0+80.0 ks. four uncatalogued x-ray sources have been detected, however... | grb 200405b: swift-xrt observations |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 201104a (ohno et al. gcn circ. 28828) in a series of observations tiled on the sky. the total exposure time is 4.7 ks, distributed over 3 tiles; the maximum exposure at a single sky location was 2.4 ks. the data were collected between t0... | grb 201104a: swift-xrt observations |
at 19:10:18 ut on 29 november 2023, the atmosphere-space interactions monitor (asim) mission triggered on the long bright grb 231129c. the burst was also detected by fermi-gbm (sharma et al., gcn circ. 35221, and sharma et al., gcn circ. 227), maxi/gsc (kawakubo et al., gcn circ. 35223), calet (shimizu et al., gcn circ... | grb 231129c: asim mxgs observation and localization |
at 15:43:52 ut, the swift burst alert telescope (bat) triggered and located grb 200819a (trigger=992099). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 21.428, +63.048 which is ra(j2000) = 01h 25m 43s dec(j2000) = +63d 02' 52" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 200819a: swift detection of a burst |
at 07:09:26 ut, the swift burst alert telescope (bat) triggered and located grb 200901b (trigger=994165). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 217.879, -38.716 which is ra(j2000) = 14h 31m 31s dec(j2000) = -38d 42' 58" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 200901b: swift detection of a burst |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 201020b (arimoto et al. gcn circ. 28716), collecting 1.7 ks of photon counting (pc) mode data between t0+72.1 ks and t0+74.3 ks. an uncatalogued x-ray source is detected and is above the rass limit, and is therefore likely the grb afterg... | grb 201020b: swift-xrt afterglow detection |
"at 03:34:26.00 ut on 03 august 2020, the fermi gamma-ray burst monitor (gbm) triggered and located grb 200803a (trigger 618118471 / 200803149) which was also detected by the fermi/lat (cutini et al. 2020, gcn 28203). the fermi gbm final real-time localization (gcn 28196) is consistent with the lat position. an x-ray a... | grb 200803a: fermi gbm detection |
swift-xrt has performed follow-up observations of the swift-bat-detected burst grb 231110a, collecting 10 ks of photon counting (pc) mode data between t0+8.9 ks and t0+61.1 ks. four uncatalogued x-ray sources are detected consistent with being within 296 arcsec of the swift-bat position, of which one ("source 2") is be... | grb 231110a: swift-xrt afterglow detection |
at 22:57:08 ut, the swift burst alert telescope (bat) triggered and located grb 210807c (trigger=1064421). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 143.551, -51.409 which is ra(j2000) = 09h 34m 12s dec(j2000) = -51d 24' 31" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210807c: swift detection of a burst |
at 23:52:59 ut, the swift burst alert telescope (bat) triggered and located grb 190630c (trigger=912239). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 293.908, -32.751 which is ra(j2000) = 19h 35m 38s dec(j2000) = -32d 45' 03" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 190630c: swift detection of a burst |
at 14:17:19 ut, the swift burst alert telescope (bat) triggered and located grb 231111a (trigger=1195887). swift slewed immediately to the event. the bat on-board calculated location is ra, dec 290.234, +52.447 which is ra(j2000) = 19h 20m 56s dec(j2000) = +52d 26' 49" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 231111a: swift detection of a burst with an optical counterpart |
at 23:32:06 ut, the swift burst alert telescope (bat) triggered and located grb 211227a (trigger=1091101). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 132.126, -2.702 which is ra(j2000) = 08h 48m 30s dec(j2000) = -02d 42' 05" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 211227a: swift detection of a burst |
we have analysed 7.8 ks of photon counting (pc) mode xrt data for the swift-bat-detected burst grb 220412b (gropp et al. gcn circ. 31886), collected between t0+4.7 ks and t0+29.1 ks. no x-ray sources have been detected consistent with being within 296 arcsec of the swift-bat position. the 3-sigma upper limit in the fie... | grb 220412b: swift-xrt observations |
swift-xrt has performed follow-up observations of the possible hawc-detected burst grb 191210a (https://gcn.gsfc.nasa.gov/notices_amon_hawc/9066_1171.amon) in a series of observations tiled on the sky. the total exposure time is 8.1 ks, distributed over 20 tiles; the maximum exposure at a single sky location was 948 s.... | possible hawc-detected grb 191210a: swift-xrt observations |
we have analysed 3.8 ks of photon counting (pc) mode xrt data for the swift/bat-detected burst grb 190816a (page et al. gcn circ. 25368), collected between t0+141.7 ks and t0+216.6 ks. one uncatalogued x-ray source has been detected consistent with being within 296 arcsec of the swift/bat position, it is below the rass... | grb 190816a: swift-xrt observations |
at 20:24:28 ut, the swift burst alert telescope (bat) triggered and located grb 231214a (trigger=1202386). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 305.736, -72.436 which is ra(j2000) = 20h 22m 57s dec(j2000) = -72d 26' 09" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 231214a: swift detection of a burst |
at 12:49:20 ut, the swift burst alert telescope (bat) triggered and located grb 170516a (trigger=753110). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 41.598, -55.899, which is ra(j2000) = 02h 46m 24s dec(j2000) = -55d 53' 54" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 170516a: swift detection of a burst |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 210826a (ohno et al. gcn circ. 30721), for a total exposure time of 4.9 ks. the data were collected between t0+36.5 ks and t0+49.7 ks, and are entirely in photon counting (pc) mode. eight uncatalogued x-ray sources have been detected, ho... | grb 210826a: swift-xrt observations |
fast radio bursts (frbs) are an emerging class of most likely extragalactic astrophysical transients whose physical origin remains a mystery. in spitler et al. (2016), we reported the discovery of the first repeating frb using arecibo, which we have subsequently detected with the gbt multiple times as well. this extrao... | coordinated x-ray and radio observations of the repeating fast radio burst frb 121102 |
at 19:49:15 ut, the swift burst alert telescope (bat) triggered and located grb 170524a (trigger=754322). swift slewed immediately to the source. the bat on-board calculated location is ra, dec 319.456, +48.587, which is ra(j2000) = 21h 17m 49s dec(j2000) = +48d 35' 15" with an uncertainty of 3 arcmin (radius, 90% cont... | grb 170524a: swift detection of a burst (or possible new sgr) |
at 06:19:20 ut, the swift burst alert telescope (bat) triggered and located grb 220518a (trigger= 1107050). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 55.369, -47.571 which is ra(j2000) = +03h 41m 29s dec(j2000) = -47d 34' 15" with an uncertainty of 3 arcmin (radius, 90% cont... | grb 220518a: swift detection of a burst |
using the 0.92m asiago schmidt telescope, we observed the field of grb 190613b 11.954 h after the burst (d'ai et al. gcn 24807) in g, r and i. we detected a source consistent with the optical and x-ray afterglow (burgess et al. gcn 24808, beardmore et al. gcn 24812, bissaldi et al. gcn 24814, marshall et al. gcn 24817,... | grb 190613b: optical observation from asiago schmidt |
at 21:52:08 ut, the swift burst alert telescope (bat) triggered and located grb 210207b (trigger=1031297). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 270.582, +53.694 which is ra(j2000) = 18h 02m 20s dec(j2000) = +53d 41' 39" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210207b: swift detection of a burst with a bright optical counterpart |
swift-xrt has performed follow-up observations of the maxi-detected burst grb 221008a (soejima et al. gcn circ. 32630) in a series of observations tiled on the sky. the total exposure time is 1.2 ks, distributed over 4 tiles; the maximum exposure at a single sky location was 466 s. the data were collected between t0+50... | grb 221008a: swift-xrt observations |
i present a study of the mass-metalliciy (mz) relation in a redshift range of z ∼ 0.3-3.4 using 33 star-forming galaxies selected by gamma ray bursts (grbs) with emission metallicity measurements. grbs are beacons of star-forming galaxies up to very high redshifts. the detectability of these extremely bright anddust-pe... | tracing the mass-metallicity relation of star-forming galaxies at high redshifts using grb-selected galaxies |
"we re-observed the position of short grb 210726a (bernardini et al., gcn 30523; veres et al., gcn 30540; palmer et al., gcn 30536; tohuvavohu et al., gcn 30535) with the karl g. jansky very large array (vla) under program 20b-057 (pi: fong) beginning on 2021 august 07.02 ut (11.21 days post-burst) at a mean frequency ... | grb 210726a: vla radio afterglow detection |
swift-xrt has performed follow-up observations of the integral-detected burst grb 190919b (mereghetti et al. gcn circ. 25788), collecting 3.0 ks of photon counting (pc) mode data between t0+28.6 ks and t0+36.4 ks. an uncatalogued x-ray source has been detected 1.1 arcsec from the reported grond afterglow position (bolm... | grb 190919b: swift-xrt observations |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 201208a (dirirsa et al. gcn circ. 29003), collecting 5.0 ks of photon counting (pc) mode data between t0+70.4 ks and t0+111.4 ks. four uncatalogued x-ray sources are detected, of which one ("source 2") is above the 2sxps 3-sigma upper li... | grb 201208a: swift-xrt afterglow detection |
at 08:42:38 ut, the swift burst alert telescope (bat) triggered and located grb 210307a (trigger=1036139). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 119.190, -66.963 which is ra(j2000) = 07h 56m 46s dec(j2000) = -66d 57' 45" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210307a: swift detection of a burst |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 210605b (james delaunay et al. gcn circ. 30130), collecting 5.0 ks of photon counting (pc) mode data between t0+74.2 ks and t0+96.6 ks. one uncatalogued x-ray sources has been detected, however it is not above the rass limit or shows def... | grb 210605b: swift-xrt observations |
swift-xrt has performed follow-up observations of the ipn-detected burst grb 201227a (ursi et al. gcn circ. 29179) in a series of observations tiled on the sky. the total exposure time is 7.5 ks, distributed over 4 tiles; the maximum exposure at a single sky location was 5.3 ks. the data were collected between t0+51.6 ... | grb 201227a: swift-xrt observations |
swift-xrt has performed follow-up observations of the swift/bat-guano-detected burst grb 220107a (delaunay et al. gcn circ. 31402), collecting 699 s of photon counting (pc) mode data between t0+26.7 ks and t0+27.4 ks. an uncatalogued x-ray source is detected and is above the rass 3-sigma upper limit at this position, a... | grb 220107a: swift-xrt afterglow detection |
swift-xrt has performed further follow-up observations of the fermi/gbm (e. bissaldi et al. gcn 30405) and swift/bat-guano detected burst grb 210706a (tohuvavohu et al., gcn circ. 30393), collecting 9.5 ks of photon counting (pc) mode data between t0+43 ks and t0+180 ks. the uncatalogued x-ray source (src #2) detected ... | grb 210706a: swift/xrt afterglow confirmation |
at 15:49:44 ut, the swift burst alert telescope (bat) triggered and located grb 180102a (trigger=802999). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 203.115, +62.148 which is ra(j2000) = 13h 32m 28s dec(j2000) = +62d 08' 53" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 180102a: swift detection of a burst |
at 15:28:49 ut, the swift burst alert telescope (bat) triggered and located grb 200806a (trigger=987016). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 52.905, +37.082 which is ra(j2000) = 03h 31m 37s dec(j2000) = +37d 04' 55" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 200806a: swift detection of a burst |
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