cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-glvn34n
title: 1870006

description: Joint INTEGRAL and XMM-Newton observations of GRS 1915+105. We have been monitoring the black hole binary GRS 1915+105 since March 2019 in radio with the MeerKAT Interferometer (South Africa) and with the AMI-LA telescope (UK) as well in the X-rays with the All-Sky monitor Swift/BAT and MAXI on the ISS and with dedicated Swift/XRT observations. Since July 2019 GRS 1915+105 has been showing a varying behaviour displaying accretion states very rarely or never observed in the past ~30 years of its current outburst.After sampling a relatively soft (and obscured) state GRS 1915+105 went back to a harder state approximately 2 weeks ago. Very recently (September 30th) the MAXI/GSC light curve showed a sudden decrease in count rate accompanied by a decrease in radio emission. We triggered a dense Swift monitoring of the source and we started monitoring the target daily with AMI-LA in radio. The energy spectrum measured by XRT is a power law with photon index ~0.8 affected by heavy absorption with an equivalent N_H of   ~3E+23/cm2. This spectral shape suggest  obscuration and likely a high level of radiation reprocessing which will be probed in detail by INTEGRAL. In radio the target shows a low flux density (~3mJy) and very limited variability. The combination of heavily absorbed/reprocessed X-ray emission and low non-variable radio emission has not been observed in detailed so far. We have observed (1) low X-ray flux flux without local absorption + low flux radio emission  (2) heavily absorbed X-ray emission and high flux density and variable radio emission  (3) heavily absorbed (soft) X-ray emission and moderate (~10mJy) non variable radio emission. We hereby require to trigger joint XMM+INTEGRAL proposal  086496 (P.I.: Motta) to observe GRS 1915+105 transitioning to a new - likely radio quiet (only core jet emission) - obscured state.  [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gmwaktx
title: 1240027

description: We request Target of Opportunity (ToO) observations to study a (new or known) Black Hole (BH) transient in two distinct spectral states (440 ks each) simultaneously with two XMM-Newton observations (10 ks each) and multi-wavelength campaigns. BH transients sporadically appear and display complex spectra and fast time-variability properties. Our goal is to witness their evolutions and connections to radio/Opt./NIR properties to understand the accretion/ejection processes. Using INTEGRAL simultaneously with XMM-Newton and ground-based facilities we aim to measure in detail the spectral variations (curvature and breaks of the Compton medium) and correlate them with disc and jet evolutions. With an unprecedented high-energy sensitivity in any sky region INTEGRAL allows us to i) disentangle the different contributions to the broadband continuum emission (strength of the reflection hump test of thermal Comptonization vs hybrid models)  ii) shed light on the nature of the additional parameter to the accretion rate suspected to drive state changes and iii) reveal the relationship between the hard X/soft gamma-ray emission jets and their evolution with time. The different physical components (star accretion disc winds hot inner flow compact object corona relativistic jet) emit and absorb radiations at different frequencies and are influenced by the others. Such multiwavelength observations are the most fruitful way forward to constrain distinct models. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gnjzm2v
title: 0620015

description: We propose a long 600 ks INTEGRAL observation with multiwavelength supporting observations to test models for the nuclear jet emission in the nearest radio galaxy Centaurus A by constructing a detailed spectral energy distribution (SED) ranging from radio through gamma ray bands.  The emphasis will be to extend present X-ray results into the hundreds of keV and MeV range with high statistical significance by including results from GLAST MeV scanning  observations and into the radio range with 8.4 and 22 GHz TANAMI and 4.8 8.6 17 19 38 and 40 GHz ATCA monitoring. The resulting Radio/IR/INTEGRAL/GLAST SED will allow for evaluating nuclear jet models such as the spine-sheath stratified jet model. These detailed results can then be the basis for modeling other more distant radio galaxies and quasars. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gqcgyk4
title: 0220032

description: We propose to compare and contrast the broadband gamma ray spectrum of two carefully chosen Seyfert 1 galaxies with INTEGRAL MCG-2-58-22 and NGC3516 with a view to obtaining a better understanding of the intrinsic high-energy radiation from the central engine.  The former object belongs to the Piccinotti sample of galaxies and is bright enough to be easily detectable by JEMX IBIS-ISGRI and SPI over this energy range.  BATSE and OSSE have in fact detected it at high energies at a flux level of ~1E-10 erg cm-2 s-1 in the 20-100 keV range.  This object has all the hallmarks of an unobscured nucleus.  NGC3516 exhibits the characteristics of a bare Seyfert 1 nucleus that intermittently suffers the effects of transient absorption possibly caused by the passage of gas clouds across the line of sight.  This object will also be clearly visible with INTEGRAL.  We choose MCG-2-58-2 as our prime target because previous X-ray observations indicate that this source is the best-known candidate for a bare Seyfert 1 nucleus (i.e. a nucleus without spectral complexity).  Furthermore the source spectrum is flatter than the cannonical 1.9 indicating that a distribution of power law indices in Seyfert galaxies is possible.  The NGC3516 emission is likewise readily detectable by JEMX and IBIS-ISGRI and by SPI.  We wish to observe it on two separate occassions.  It has a hard power law emission at higher energies with significant energy dependent modulation around 10 keV.  Comparing and contrasting the three measurements allows (1) testing and constraining X-ray production models for an unobscured central Seyfert 1 engine.  (2) Evaluation of the effect of nearby clouds on this emission and (3) to better define the framework of the unified theory by assessing what a bare active nucleus and its local environment should look like. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gtq50oh
title: 0420016

description: Evidence continues to build that the soft gamma repeaters (SGRs) are  magnetars objects in which the magnetic field energy dominates all other energy sources including rotation.  This implies that they possess the strongest known magnetic fields in the universe (10^15 G).  SGRs go through phases of intense activity during which they may emit hundreds of bursts within a period of weeks to months.  During those periods they exhibit properties which are quite different from their quiescent properties.  Their strong magnetic fields are probably mainly responsible for these changes and accordingly it is interesting to study them intensely at these times.  We propose to continue our successful AO-1 2 and 3 proposals and request two ToO observations of any of the known or of any newly discovered SGRs during their active phases.  We request that the ToO take place within one month of the trigger.  For clarity we have filled out one observation form for each of the known SGRs for one suspected SGR and for one unknown SGR.  Our total request however is for just TWO 240 ksec ToOs.  This is one of two SGR proposals being submitted by nearly identical teams.  The other proposal (M. Feroci  and  K. Hurley Co-PIs) requests data on SGRs serendipitously detected by INTEGRAL.  Although the scientific justifications of the two proposals are nearly identical the proposals are independent of one another in the sense that the objectives of each can be achieved without the acceptance of the other. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gxwzqb2
title: 1140029

description: PSR B1259-63 is a gamma-ray binary comprising a radio pulsar in orbit around a Be star. To study the hard X-ray activity after the next periastron passage happening within AO11 perhaps concurrent with a new GeV flare we propose a series of INTEGRAL observations with total exposure of 800 ks. These observations will provide a unique chance to understand the hard X-ray emission after periastron and shed light on the nature of the possible GeV flare. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gyumgp6
title: 0120047

description: The  study of hard X-ray emission (i.e. energy above 20 keV) of Seyfert galaxies is a powerful tool for extracting information on the intrinsic source emission properties as luminosity and spectral shape  of the sources and on the intervening medium.Observations and measurements are fundamental and necessary for the study and understanding of the emission mechanisms operating in this type of objects and for testing unified models.At lower energies we can obtain informations on column densities ionisation and abundances of the surrounding matter which probe the environment around the central engine.We require three observations each of 100 ks of the brightest Seyfert 2 galaxy NGC 4945 and one observation of 400 ks of NGC 5506. These observations will provide a good detection of the high energy spectra which will allow us precise spectral and variability studies. These observations will also provide the basis for a comparison of Seyfert 1 and Seyfert 2 galaxies at high energy to test the unified model which predicts the same behaviour (spectra variability) for both types. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gz8fxol
title: 8860287

description: This is a public observation where the Earth will drift through the field of view of the INTEGRAL instruments. Results from this observation will help in separating the cosmic and instrumental backgrounds and so ultimately lead to improved background subtraction.Scientifically the main goals are to measure the spectral shape of the cosmic X-ray background emission above 20 keV and to study any high-energy emission from the Earth during storms in auroral regions. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-h13e78a
title: 8860085

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-h1gj90h
title: 0220028

description: Encouraged by the success of the AO1 INTEGRAL monitoring campaign on GRS 1915+105 we propose to continue the monitoring of the most enigmatic microquasar of our Galaxy during AO2. Two of our three AO1 observation q`and the 2 ToO observations were primilary done during the plateau state of the source. Our main goal is to obtain time-resolved hard X-ray spectra of all the fundamental states of GRS 1915+105  in order to fix the origin of the hard tail - as seen by IBIS and SPI - and thus enable us to test different models: Comptonization by thermal nonthermal or free-fall electrons and/or synchrotron emission from the compact jet. In addition we are in position to provide simultaneous radio and infrared observations which will allow us to further study the accretion-ejection links. JEM-X will allow us to discriminate between spectral states in the course of each observation and study with the long exposure time the very low frequency QPOs (<10 mHz). As for the past campaign the INTEGRAL observations will be conducted simultaneously with RXTE in order to explore the rapid variability (0.1-100 Hz) at both low and high energies. The complementarity of the INTEGRAL instruments will also enable us to study  any possible annihilation line features. To achieve our goals and especially obtain spectra up to very high energy we need long exposure times. We request that our observations be undertaken in segments of 100 ksec exposures. To meet our scientific goals we require ten such segments each  separated by approximately one month compatible with scheduling constraints. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-h2yn5ut
title: 8860083

description: Crab 5*5 pattern to test ISGRI low energy response.
DOI: 10.57780/esa-h50enjp
title: 0399832

description: Galactic Plane Survey for AO 03 and Pattern 32
DOI: 10.57780/esa-h9dp2e4
title: 1670003

description: INTEGRAL TOO observations of PKS 1830-211
DOI: 10.57780/esa-h9l7e1s
title: 8860280

description: Crab 2013: SPI/IBIS 5x5 wide rev 1268 and 1269
DOI: 10.57780/esa-ha4y5xk
title: 0720014

description: We propose to conduct two fixed-time observations  (237 ks + 150 ks) of the galactic microquasar SS433 covering  the egress from the primary orbital eclipse and  ingress into the following primary eclipse near the face-on disk precessional phase of the source in November 2010.  The main  scientific goal is to carry out   hard X-ray spectroscopy of the primary eclispe ingress/egress and to study its highly variable form. The phase-resolved spectroscopy will be used to probe the structure and physical parameters of  a 20 keV rarefied corona around the center of  the supercritical accretion disk in SS433 discoverd in   previous INTEGRAL observations.  The proposal is not associated with the AO-7 Key Programs.  [truncated! Please see actual data for full text]
DOI: 10.57780/esa-haajmmn
title: 8860055

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-hbvj7oh
title: 0299850

description: Galactic Plane Survey for AO 02 and Pattern 50
DOI: 10.57780/esa-hc0lmhw
title: 0399915

description: Deep extra galactic survey Proposal for AO 03 Cycle 1
DOI: 10.57780/esa-hcnimis
title: 1770005

description: The  blazar  OJ287 was recently seen in high MWL state (ATELs 13637 13658 13677 13702) including a bright radio flare seen at Effelsberg. Swift/XRT observed a 0.3-10 keV flux of 2e-11 erg/s/cm2 on April 23 2020. Although it is not granted that the source is or will be bright also in hard X-rays considering the generally very interesting MWL state and the importance of having a good SED constraint in this band a deep IBIS observation is recommended as even a UL will be very useful to constrain the inverse Compton peak.  In order to maximize the IBIS exposure we choose the 5x5 dither pattern. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-he1kwe3
title: 8860015

description: This Crab offset staring observation is used to determine the off-axis imaging properties of IBIS and to provide an absolute calibration of  the off-axis PSF.  The off-axis position of the Crab in this staring observation (zenith 9.6 degree azimuth 90. degree)  is defined in the instrumental coordinate system and depends on the start date of the observation. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-heh7byb
title: 0299912

description: Galactic Centre Deep Exposure for AO 02 and Pattern 12
DOI: 10.57780/esa-hfa6vh1
title: 1620029

description: We propose a multi-year program of ultra-deep observations of the M81 extragalactic field. This survey will constitute INTEGRAL legacy for the study of the AGN population at low hard X-ray fluxes and provide unique synergy with the upcoming all-sky survey by the eROSITA and ART-XC telescopes onboard the Spectrum-Roentgen-Gamma spacecraft. We ask for 5 Ms observations to be performed in the standard 5x5 dithering pattern during 2019-2020. We are planning to ask for an additional 5 Ms after completion of this proposal. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hhenp9n
title: 0299842

description: Galactic Plane Survey for AO 02 and Pattern 42
DOI: 10.57780/esa-hix4kjm
title: 0120191

description: We propose to use INTEGRAL SPI and IBIS to measure gamma-raylines and hard X-ray continua to clarify the mechanismsnucleosynthesis and dynamics of sufficiently nearbysupernovae beyond those observations reserved for the coreprogram. These might include important additional observationsof objects that do meet the guaranteed time triggers andobservations of detectable objects that do not satisfy thosetriggers. The requested observations vary from single earlytests of a specific hypothesis for relatively distant SN Iato extensive observations for Galactic events. We define theTarget of Opportunity trigger criteria clearly for eachcategory by specifying a complete list of potential hostgalaxies. There is a relatively low probability of any of theseevents happening in a given year  we must make the mostof any opportunity we  get. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hixkoh8
title: 8860138

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-hiyvyx7
title: 1670002

description: INTEGRAL TOO Observation of MAXI J1820+070
DOI: 10.57780/esa-hj9mn4m
title: 1120014

description: The mass transfer and accretion mechanisms in SFXTs are key questions to be answered in order to place the SFXTs in the wider context of HMXB systems. Current theories centre on mass transfer via isotropic but inhomogeneous (clumpy) winds but some systems also show evidence of disk-like structures around the supergiant analogous to those seen in Be/X-ray binaries. We propose a campaign of periastron observations of 2 SFXTs with known ephemerides following on from accepted and successful AO-9 and AO-10 programmes (P.I. Drave PropIDs 0920016 and 1020009). Using both INTEGRAL and XMM-Newton we will measure the instantaneous accretion rate emission spectrum and time variability generated on and around the neutron star during its periastron passage. Now that the orbital parameters of these SFXTs are well-determined targeted continuous broad-band observations around periastron provide us with the best opportunity to use the (assumed) neutron star as a direct probe of the circumstellar wind environment. To achieve the goals outlined in this proposal we request 630 ks of fixed time INTEGRAL observations complemented with 100 ks of simultaneous XMM-Newton observations. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hkrubke
title: 1120003

description: For the first 5 years of INTEGRALs operational life the scientific Core Programme included a keycomponent that was regular scans of the Galactic Plane. These led to a wealth of discoveries of new sources and source types a large fraction of which were highly transient. These discoveries can certainly be considered one of the strongest results from and legacies of INTEGRAL. From AO-5 onwards these regular scans were discontinued and this resulted in a significant drop in the discovery rate of new systems in and around the plane of our Galaxy. In AO8 however a multiyear proposal to reinstate the scans was approved and the programme is still on going in AO9. We propose here to continue the Galactic Plane Scans as a Key Programme throughout AO10 and AO11 to regularly monitor known systems as well as to dramatically enhance the chances of discovering new systems. This will allow a rapid response to bright events and a detailed study of faint transients and long term activity. Such a programme will be of high value to a very large fraction of the high-energy astronomy community stimulating science immediately and furthermore contributing greatly to the INTEGRAL legacy.To this aim a total of 3 Msec (1 in AO101 and 2 in AO11) of observations is necessary to cover theplane with regular scans every orbit excluding the central zone that will be covered by the GalacticBulge monitoring programme (should that programme be accepted) and any other region studieddeeply in other proposals. We suggest that in order to maximise the engagement of the scientificcommunity the observations should be made public immediately. The team will make as it is alreadydoing through AO8-9 the scw-resolution IBIS and JEM-X light curves (in two energy bands) and perrevolution mosaic images publicly available through the web as soon as possible.  Any interesting source behaviour that emerges from our observations will be announced prompt [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hlzvp1d
title: 8860140

description: Crab-2007 Spring: IBIS on-axis staringThis observation is intended to help in the correciton the secondary lobes in IBIS images.
DOI: 10.57780/esa-hn467yb
title: 1870004

description: INTEGRAL ToO Observations of FRB 180916.J0158+65
DOI: 10.57780/esa-hn4k778
title: 1020017

description: We propose to continue our Key Programme that consists of high-cadence monitoring of the inner spiral arms of the Galaxy with INTEGRAL paired with ToO observations of new transients with XMM-Newton and Swift. While these regions are already exposed thanks to the Galactic Plane Scans (GPS) many transients are being missed because of month-long gaps between scans of any particular region. The INTEGRAL Spiral Arms (ISA) program (25.6 ks per spacecraft revolution during visibility periods for a total of 1.2 Ms) complements the successful Galactic Bulge (GB) program by extending the monitored region of the Galaxy to the Inner Perseus/Norma Arm tangents on one side of the GB and the Scutum/Sagittarius Arms on the other. These fields feature a high density of obscured high-mass X-ray binaries (HMXBs) including Supergiant Fast X-ray Transients (SFXTs) as well as other hard X-ray emitting sources (e.g. microquasars low-mass X-ray binaries and magnetars) that INTEGRAL is well-suited to finding thanks to its large field of view and angular resolution at high energies even in crowded regions of the sky. Mosaic images and source light curves in 2 energy bands for ISGRI and JEM-X are being provided to the community1 permitting rapid dissemination of results which enable prompt follow-up of interesting events. The ISA project represents the cornerstone of our ongoing study of transient and variable hard X-ray populations in the Milky Way. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hpexolt
title: 0420030

description: We propose to trigger a maximum of 3 INTEGRAL ToO observations on known transientsources discovered with INTEGRAL Observatory if they undergo a new outburst during AO4 coordinated with XMM-Newton (already approved triggered observations during XMM/AO5). We ask for 300 ks per observation in order to get a high-quality spectrum and to follow the entire outburst also in its decaying phase.INTEGRAL  capabilities coordinated with XMM-Newton are essential in unveiling the nature of the sources. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hps36f7
title: 0320102

description: We propose to invest 1.5 Msec of the INTEGRAL time to carry outdeep observation of one of the nearest Galactic spiral arms - Crux- not well investimaged by INTEGRAL so far. Part of Carina spiral armalso will be in the field of view of IBIS and SPI telescopes.These observations will sufficiently increase our knowledge ofpopulation of weak Galactic sources in this region and in addition to that willallow to detect a set of weak absorbed active galactic nuclei in thedirection of Great Attractor. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hqf63my
title: 0299839

description: Galactic Plane Survey for AO 02 and Pattern 39
DOI: 10.57780/esa-hqt3v49
title: 1140011

description: The explosion mechanism associated with thermonuclear supernovae (SNIa) is still a matter of debate. However there is a wide agreement that high amounts of radioactive nuclei are produced during these events and they are expected to be strong gamma-ray emitters able to be used as diagnostic tools of the explosion. Detailed numerical simulations have convincingly shown that SPI and IBIS can be succesfully used to discriminate among the explosion mechanisms provided the supernova occurs at an appropriate distance. These tests include the temporal evolution of the lines as well as the value of the relative intensities the properties of the continuum and the linewidths. The data collected by the X-ray and optical monitors (JEM-X and OMC) will also be analysed as they can provide additional information about the nature of the presupernova system and the spatial heterogeneities of the ejecta.  [truncated! Please see actual data for full text]