cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-mrsk6pp
title: 0620061

description: We propose  to perform a 260 ks INTEGRAL ToO observation of a transient millisecond X-ray pulsar in outburst. The target can be either one of the eight known transient accreting millisecond X-ray pulsars in thecase of a new outburst or a newly observed object of this class. As these transient sources have broad astronomical interest an outburst will trigger ToO criteria with other X-ray observatories. Theseobservations can be coordinated in order to study the broad band spectrum in detail from hard to soft X-ray energies as well as the timing properties of the  source during its outburst. This will allow us to disentangle the contribution of soft black body reflection (if any) and hard Comptonized spectral components as wellas the detection of discrete emission/absorption features or Type I X-ray bursts (if present). In particular we will be able to study the energy spectrum of these sources which is usually observed to be quite hard even in outburst in a broad band energy range and with unprecedented high sensitivity above 20 keV. The INTEGRAL observation will also allow  a timing analysis in an interesting and yet unexplored energy range. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-mvfvkwv
title: 0399828

description: Galactic Plane Survey for AO 03 and Pattern 28
DOI: 10.57780/esa-mwnlk5v
title: 1720015

description: The objective of this proposal is to study the extent of diffuse emission from positron annihilation and the decay of Al-26 in our Galaxy by creating deeper and more uniform exposure maps at medium Galactic latitudes. We ask that INTEGRAL devote 2 Ms in AO16 and 2 Ms in AO17 to observing mid-latitude regions of the Inner Galaxy that are underexposed compared with regions near the Plane. The survey regions are bounded by Galactic longitude and latitude -70 deg < l < 70 deg and 7 deg < b < 33 deg. Around 10%-50% of this survey area has 100-500 ks of exposure time at present. In these regions the proposed observations will add a minimum of 200 ks per AO which after two observing cycles represents an increase in exposure time of > 50%-100% compared with archival data. This proposal will build a legacy dataset that is of interest to a wide community of scientists given the variety of sources present and given how the new data complements ongoing surveys of the Galactic Plane Bulge and Center. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-mxmzuvk
title: 1570008

description: TOO public observations of MAXI J1820+070
DOI: 10.57780/esa-myvr7h8
title: 8860192

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-n11t65j
title: 0820001

description: The Galactic bulge region is a rich host of variable X-ray and gamma-ray point sources. Since AO-3 we are monitoring about 140 of them with one hexagonal pattern about every 3 days whenever it is visible by INTEGRAL. Due to the high scientific return and in order to preserve the continuity with respect to past observations of this ever-changing region we propose to continue our successful program. Our main aim is to monitor and actively report on any (transient) activity  in the long run the program will provide inputs about the soft and hard-X-ray (transient) population as well as on the accretion regimes in the various types of binary systems. Because of the new format since AO-7 and as a service to the scientific community the observations are to be made public. We intend to make the IBIS/ISGRI and JEM-X quick-look results publicly available through the web as soon as possible after the data are made available so that rapid follow-up by the community is possible. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-n4lgz32
title: 1620006

description: We propose to continue the study of the long-term evolution of the cyclotron line energy Ecyc in Her X-1. The long-term decay of Ecyc discovered in data taken between 1993 and 2012 (Staubert et al. 2014) amounts to  5 keV over 20 yrs (Staubert et al. 2016). However the last observing campaign in 2016 coordinated between NuSTAR and INTEGRAL had provided evidence that the decay has ended (Staubert et al. 2017). This was confirmed by further observations until early 2018. It is now the question whether we will (at some time) see a new increase similar tothe one that was observed between 1990 and 1993. Based on the idea that both this increase and the subsequent long-term decay are most likely related to the evolving configuration of the magnetic field at the accretion mounds formed by matter accumulated in the polar regions of the neutron star Staubert et al. (2016 2017) had speculated that a new increase might happen once Ecyc had reached a low level similar to the one found when the line was first discovered. We therefore propose to continue the monitoring of Her X-1 during AO-16 with two observations of 200 ks each (about half a year apart). [truncated! Please see actual data for full text]
DOI: 10.57780/esa-n692opd
title: 0399830

description: Galactic Plane Survey for AO 03 and Pattern 30
DOI: 10.57780/esa-n6bvmwr
title: 0520051

description: Mrk 421 one of the brightest TeV gamma-ray sources in the sky is one of the BL Lac objects which have two broad emission maxima at higher energies than normal BL Lac objects show one at X-ray energies and one at TeV energies. Both maxima are separated by a deep and sharp minimum which lies exactly in the energy range of INTEGRAL and which is nearly unexplored. Both emission components are believed to be connected via a common particle population which creates both emission components by different physical emission processes (Synchrotron and inverse Compton). This conjecture can be tested by simultaneous observations at different wavelengths looking for time correlations of the measured intensities. Moreover with INTEGRAL the transition region can be explored for the first time. It is the aim of this proposal to observe Mrk 421 with INTEGRAL when it is in an active state together with radiotelescopes IR optical X-ray telescopes and with Cherenkov telescopes.In its quiescent state at hard X-rays and low Gamma-rays Mrk 421 is too weak to be observable by the two main instruments (IBIS and SPI) of INTEGRAL in the r^ant energy range. Therefore an observation of this source with INTEGRAL makes only sense when it is in an active state. So we ask for a ToO observation of this source when it is active. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-n6zw9ll
title: 8860214

description: Crab cal. Spring 2010
DOI: 10.57780/esa-n8051ng
title: 0299841

description: Galactic Plane Survey for AO 02 and Pattern 41
DOI: 10.57780/esa-nce9qy2
title: 0720016

description: We propose to perform with INTEGRAL a long monitoring of 10 observations of 200 ks each of the Seyfert 1 galaxy Mkn 509 simultaneously with an already accepted XMM-Newton monitoring (10 pointings of 60 ks each spaced by 4 days) of this source.This will provide for the first time a very broad band spectral follow-up from the UV to the soft $gamma$-ray of a Seyfert galaxy on a month time scale. This will permit: 1) to disentangle the different spectral components in the UV soft X medium X-ray and $gamma$-ray bands 2) to test different origin of the primary continuum by determining whether the shape of the X-ray continuum is related to the UV intensity 3) to elucidate the origin of the soft X-ray excess and 4) to determine the shape and variability of the Fe 6-7 KeV emission complex and it relation to the high energy ($>$ 10 keV) band.  The proposed simultaneous INTEGRAL/XMM-Newton long monitoring of one of the brightest Seyfert galaxies is a unique opportunity to put firm conclusionson the still largely unknown nature and origin of the UV/X-ray/$gamma$-ray emission of this class of objects. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-nf75dah
title: 0299832

description: Galactic Plane Survey for AO 02 and Pattern 32
DOI: 10.57780/esa-nfg8smz
title: 8860175

description: OMC FF sequence ISOC V10 onwards: sequence of FF measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-njiw4c4
title: 0220104

description: We propose to use advantages of the INTEGRAL observatory thespatial resolution down to 10$$ wide field of view excellent     energy resolution and high sensitivity of its telescopesin the hard X-rays to study the region of the enhancedX-ray source density - Sagittarius Arm tangent (l$sim$40b$sim$0). [truncated! Please see actual data for full text]
DOI: 10.57780/esa-nl5oknu
title: 1820015

description: Massive stars and their impacts on their surrounding interstellar medium comprise the feedback scenario which is one of the main astrophysical issues in the context of galaxy and cosmic chemical evolution. Radioactivity from 26Al adds a unique diagnostic tool for studying this scenario in nearby massive-star regions. The Orion region hosts one of the closest such regions at ~400 pc. COMPTELs measurement of 1809 keV emission from this region had shown an interesting offset of the 26Al emission source from its likely sources and emission appears rather extended. This suggests champagne-like outflow into the Eridanus cavity as has recently also been seen with XMM-Newton. If true this opens unique possibilities to study the ISM as it is shaped by massive stars and the interaction of massive stars with their surrounding ISM in a new way: Due to their proximity and location on the near side of molecular clouds and at the edge of a large cavity we can compare the locations of massive stars to the morphology of the ISM and the emission pattern of 26Al radioactivity in order to constrain 26Al ejection from massive stars in mass and velocity. First observations with~3 Ms of exposure were enough for a marginal hint of the expected signal. With our proposed deepening of exposure we aim to measure the intensity and kinematics of this nearby 26Al source with INTEGRAL. With these observations we can also search for annihilation radiation and for the intensity of nuclear deexcitation gamma-rays in the MeV range both valuable diagnostics of the structure of superbubble interiors and more than 30 Fermi sources are within our target region. But mainly this will give us unique measurements of ISM dynamics and massive stars as its driving engines within INTEGRALs lifetime  there is hardly a more suitable and closer target region. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-nnvfrin
title: 0270003

description: V0332+43: non-TAC approved TOO submitted by Marc Turler and subsequently by Nami Mowlavi.
DOI: 10.57780/esa-nppa2dj
title: 8860170

description: OMC FF sequence ISOC V10 onwards: sequence of FF measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-nsllu72
title: 1020001

description: The Galactic bulge region is a rich host of variable X-ray and g-ray point sources. Since AO-3 we are monitoring about 170 of them with one hexagonal pattern about every 3 days whenever it is visible by INTEGRAL. Due to the high scientific return and in order to preserve the continuity with respect to past observations of this ever-changing region we propose to continue our successful program. Our main aim is to monitor and actively report on any (transient) activity  in the long run the program will provide regular and homogeneous inputs about the soft and hard-X-ray (transient) population as well as on the accretion regimes in the various types of binary systems. Because of the new format since AO-7 and as a service to the scientific community the observations are to be made public immediately. We intend to continue to make the IBIS/ISGRI and JEM-X quick-look results publicly available through the web as soon as possible after the data have been taken so to preserve the possibility for rapid follow-up by the community. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-nty1n8l
title: 0220140

description: Magnetically active stars are among the most ubiquitous high-energy sources in the observable skyyet they have been studied predominantly in the soft X-ray range below 10 keV where thermalcoronal plasma is the predominant source of photons. However both solar analogy and the signaturesof non-thermal radio and optical impulsive bursts from active stellar sources suggest the presence of a largepopulation of non-thermal electrons out to MeV energies. They are expected to produce a strong non-thermalbremsstrahlung continuum above 10-20 keV. We propose a novel investigation to search for non-thermalhard X-ray emission in stellar sources by simultaneously using the JEM-X (for soft X-rays) the IBIS/ISGRI(for non-thermal emission) and the OM instruments (for optical electron-induced bursts). Simultaneous radioobservations will detect enhanced production of non-thermal electron populations. Timing studiesbetween the different (thermal/non-thermal) components will indicate the nature of the hard X-rays.The results will be important to assess the role of accelerated particles in the primary energy releasein stellar coronae as well as their role in coronal heating. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-nyu08pi
title: 8860040

description: Crab off-axis 12.5/0. observation for August 2003 Crab calibration
DOI: 10.57780/esa-o1393ll
title: 8860294

description: SAS Calibration in Rev 1405
DOI: 10.57780/esa-o2i9ahg
title: 1540005

description: One of the most active areas in black hole research currently is understanding the role of jets in the overall emission properties of black holes from radio all the way to gamma-rays. Thanks to the daily monitoring campaigns in X-rays radio and optical/IR (OIR) facilities we have a solid understanding of the relation between jet emission in the OIR radio and X-rays up to 25 keV. Yet our understanding about the formation of compact jets and high energy emission is still not well established due to low number of dedicated INTEGRAL observations during the outburst decays. Most archival data do not have the statistical quality where we can study properties of Comptonizing corona (which is required for the formation of compact jets) and how jets consequently may affect electron energy distribution and perhaps directly contribute to hard X-ray emission. Our previous multiwavelength campaigns revealed secondary maxima a brightening in X-rays and OIR late in outburst decay. The nature of these secondary maxima is also still debated. We propose for two 170 ks TOO observations of a GBHT. We will trigger the first observation at the transition to the hard state as the jet turns on to investigate the relation  between the Gamma-ray emission and jet formation. We will trigger the second observation if a secondary outburst is observed close to the peak to investigate its nature. Multiwavelength coverage exists in radio and in OIR to achieve objectives of this proposal and an additional 10ks SWIFT time is requested to cover soft X-rays. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o2kfkxq
title: 0120126

description: We propose three 150 ks observations of the nearby radio galaxyCentaurus A with INTEGRAL which we plan to coordinate withcontemporaneous RXTE observations.  Cen A is the brightestextragalactic object at hundreds of keV and remains an enigma aftermore than three decades of observations.  The primary goal of thecombined observations is to characterize the continuum shape as well assearch for variations in the spectrum by contrasting the threeobservations utilizing the excellent INTEGRAL continuum sensitivityover the 2 keV to ~1 MeV band.  Any spectral variations seen willbe correlated with other spectral parameters as measuredsimultaneously by RXTE and INTEGRAL. Another primary goal of thisinvestigation is to provide an early INTEGRAL/RXTE cross calibration ofinstruments to set the basis for all such broad band measurements.Finally we will perform a speculative search for nuclear lines at 1.65and 4.5 MeV of which the latter were seen at low significance in anearly balloon observation. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o2srpql
title: 0399823

description: Galactic Plane Survey for AO 03 and Pattern 23
DOI: 10.57780/esa-o3vwtkh
title: 0399912

description: Scutum arm Proposal for AO 03 Cycle 1
DOI: 10.57780/esa-o5szghq
title: 0060006

description: Calibration observation 6: background study requested by IBISThe observations of this proposal will be executed in parallel to the SPI commissioning activitiesduring the Com-PV phase transition revolution 11-13. This proposal contains also dummy observationswhich are only used to force OSS to a certain behaviour (set TM allocation or define slew end point).obs1 force pointing and set PST SPI 46 TM taken from JEM-X (5 pkts from each -> JEMX only gets 4pkts)obs2 parallel to SPI-318  (SPI 46 TM taken from JEM-X) instrument configuration left for SPI-320obs3 parallel to SPI-330a PSD library upload (nominal TM allocation)obs4 dummy obs to set TM allocation for  SPI-330b data acquisition (SPI 68pkts taken from IBIS 104)obs5 PV nominal operation. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o6oojou
title: 1920023

description: While INTEGRAL instruments typically observe Galactic sources on the hundreds to thousands of pc scale the closest vicinity to Earth the solar system has received almost no attention from INTEGRAL in its more than 18 yr mission life time. So far the Earth had been used as an occulting object to measure the cosmic X-ray background. During one such observation IBIS could observe auroral X-ray emission from Earth in real time showing the interactions of the solar wind with the magnetic field of Earth. Such auroral emission has also been measured from Jupiter and found to not only be powered by solar activity but by the planet itself. Venus is also a known X-ray source. Lacking strong magnetic field and subsequently a pronounced magnetosphere Venus produces X-ray emission with atmospheric fluorescence as it is illuminated by Solar X-rays by Solar Wind Charge Exchange Mechanism (SWCX) or possibly by other currently poorly understood unknown processes. Most of the phenomena are restricted to photon energies of few keV but electron bremsstrahlung can be expected up to the hard X-ray regime as suggested from a population of relativistic electrons in the Jupiter system. A significant contribution to the diffuse emission above 100 keV comes from the interaction of cosmic rays (CRs) with asteroids in the Main Belt (MB) between Mars and Jupiter as well as from Kuiper Belt Objects (KBOs) Especially at the 511 keV line such a contribution from the ecliptic may result in false inferences for the size of and flux from the bulge halo and disk. We propose an observation program of the ecliptic to constrain the hard X-ray emission from Venus and Jupiter and to better estimate the foreground emission from the solar system M-NM-3-ray albedo. This proposal is a replacement and an extension of a multi-year proposal accepted in AO18 (PI: T. Siegert) and AO19. The present proposal differs primarily by adding Venus. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o800l0t
title: 1570004

description: MAXI J1820+070 is a likely new black-hole transient discovered by MAXI (ATel ) and followed-up with Swift.The lightcurve obtained with Swift/XRT shows a large variability and a possible QPO at 3e-3 Hz. An INTEGRAL observation in this phase could be particularly critical to study the broad-band emission of the source as blackhole in the hard states usually show a spectrum extending to several 100 keVs an energy band where only INTEGRAL can provide coverage.We believe that such observation would provide the entire community very interesting data to be exploited also together with the other facilities that will certainly point to the source shortly. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o8woqu8
title: 1570002

description: MAXI J1813-095 was discovered as a new transient by MAXI on 2018 February 19 and its position confirmed by Swift/XRT on February 20th. The source is mildly absorbed (N_H ~ 1.3e22) and shows a hard power-law in XRT (Gamma ~ 1.45). No source has been previously known at these coordinates. The source is likely an X-ray binary but for its exact nature broad-band spectra are necessary. INTEGRAL is crucial to obtain the high-energy spectrum a determine if the continuum rolls over and to measure the cutoff energy. This will narrow down the nature of the source (accreting black hole or neutron star white dwarf X-ray burster etc.). Furthermore by obtaining one revolution with INTEGRAL we will be able to investigate the timing behaviour and check for X-ray bursts or dips and coherent pulsations. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o9mh1np
title: 0120213

description: We propose an ultra deep exposure (2 million sec) of the Center of the Milky Way. The data of such ultra deep observation of the Galactic Center will undoubtedly be very rich and this is the most efficient way of using precious INTEGRAL observing time. These data will be a valuable addition to and a continuation of the INTEGRAL Core Program and when combined together they would become a decisive dataset for studies of high energy phenomena in this region. Should this proposal be accepted the data will be made vailable during the proprietary period to scientists of major astrophysical institutions of Russia. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-o9s9r7c
title: 8860006

description: Calibration observation 4: 270 ksec observation 9.65 degree offset from Cygnus X-1 to study the PSF extended and diffuse emissionline emission imaging capabilities in crowded fields crosscalibratoin and demonstration of IBIS imagingcapability in dither mode. In addition is this observation suitable to study the background evolution. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-oavmvwl
title: 0740009

description: There have been few dedicated observations of Seyfert 2 galaxies by INTEGRAL. However it is at hard X-ray energies that absorption becomes less important and observations can potentially reveal the emission from the close environment of the central black hole. Unfortunately there are few Seyfert 2 galaxies persistently bright enough to justify the long INTEGRAL observations required. We request therefore an INTEGRAL TOO observation of a Seyfert 2 galaxy during a period when the 10-200 keV flux is above 25 mCrab. A second observation when the source has returned to its normal state is also requested to allow the study of correlation between the various spectral components.The principle motivation of the observation is a measurement of the high energy cut-off. Curvatures at high energies can be due to either a reflection component or an exponential cut-off. Comparisons with other Seyfert 2 observations show that  25 mCrab in the 15-50 keV band is bright enough to allow a measurment of the cut-off up to ~150 keV in 200 ksec. A cut-off energy in a Seyfert 2 has been found  at energies as low as 50 keV (Circinus) using INTEGRAL data although in the Seyfert 2 best studied by INTEGRAL (NGC 4388) the cut-off was either absent or at enegies above 200 keV. Measurement of a Seyfert 2 while it is temporarily in a high flux state gives us perhaps the best chance of measuring another cut-off energy in a Seyfert 2 galaxy with INTEGRAL. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-obimzkt
title: 8860126

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-oe00tbi
title: 8860151

description: Crab-2007 Spring: JEM-X grey filter test
DOI: 10.57780/esa-of0d2nw
title: 8860216

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-og4txwy
title: 8860105

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.