cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-dadyjgg
title: 1720024

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 had amounted to ~ 5 keV over 20 yrs. The observing campaign in 2016 coordinated between NuSTAR and INTEGRAL had provided evidence that the decay has ended. This has been confirmed by further NuSTAR observations showing that the flux corrected cyclotron line energy is very stable at ~37.5 keV - actually since about 2012. It is now the question whether we will (at some time) see a new increase similar to the one that was observed between 1990 and 1993 due toa possible evolution of the magnetic field configuration at the accretion mounds formed by matter accumulated in the polar regions of the neutron star. The remarkable spectral stability shown so far by Her X-1 and its relatively high X-ray flux at high energies during the Main-On states make this source a good calibration target for IBIS/ISGRI whose performances have recently become more problematic due to the aging of the instrument. In this regard we have started a collaboration with the INTEGRAL team at ISDC using the Her X-1 data obtained in the previous cycle of observations carried out with INTEGRAL and NuSTAR and we believe it will be useful to continue this effort for a successful future use of IBIS/ISGRI. For both reasons science and inter-calibration we therefore propose two further INTEGRAL observations of 200 ks each (about half a year apart) of Her X-1 during AO-17 (with both SPI and IBIS operational) in coordination with observations by NuSTAR. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-db5emg5
title: 0420024

description: We propose to observe with INTEGRAL PKS 0537-286 the most distant gamma-loud QSO. PKS 0537-286 is the best candidate for the broad band spectroscopy capabilities of INTEGRAL. Detected in the optical radio soft X-ray and at GeV energies PKS 0537-286 was recently (yet unpublished) revealed by Swift-BAT as a constant hard X-ray source (15-150 keV). PKS 0537-286 is a flat spectrum radio quasar (FSRQ) and  a member of the MeV blazar class blazars whose spectral energy distribution (SED) peaks at MeV energies. Among all the blazars the high-z FSRQs  are the best target to settle the open question about the emission processes. In fact for such objects the  high energy emission peaks at the overlap of the X- and gamm-ray energy band which is covered by INTEGRAL.  It is at the overlap of these two energy bands that the contribution of external radiation fields to the synchrotron genereted photons can be assessed and   emission processes distinguished. With its very hard photon index (~1.1) this object is the perfect target for the broad band capabilities of INTEGRAL. In 1 Ms of observation the combined JEM-X and ISGRI spectrum would extend from 3 to 300 keV achieving in both instrument a >15 sigma level detection. This would be the most sensitive measurement of the hard X-ray/soft gamma-ray spectrumof a FSRQ and would adequately sample the  inverse Compton (IC) component in a way to detect the spectral curvature and allow a precise meausurement of the IC peak.The INTEGRAL observation will be coordinated  with AGILE (>100 MeV) and with Swift-XRT ( < 3keV ) contemporary observations. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dc8v0zu
title: 1470001

description: TOO observations of GRS 1716-249
DOI: 10.57780/esa-dfqp8s2
title: 0199924

description: Galactic Centre Deep Exposure for cycle 2 pattern 4
DOI: 10.57780/esa-dinzpqk
title: 0740001

description: This proposal is the continuation of our accepted Targets of Opportunity (ToO) on Galactic Black Hole (BH) transients. They sources appear sporadically as X-ray Novae (XN) and display complex spectra and fast time-variability properties. Witnessing their spectro-timing evolutions hard tail and radio properties are crucial to get clues on the accretion/ejection processes occurring in their vicinity. One possible approach is to use INTEGRAL together with ground-based facilities operating in radio/optical/Infra-Red (IR) to study the evolutions and relations between disc Compton medium and jets. With an unprecedented high-energy sensitivity even in a crowded sky region INTEGRAL allow us to i) constrain thermal Comptonization vs hybrid models for the production of hard components  ii) shed light on the nature of the additional parameter to the accretion rate suspected to drive state changes  iii) correlate high-energy spectral behaviours with the properties of Quasi-Periodic Oscillations seen by RXTE for which we have accepted programs  iv) probe the connection between accretion disc instabilities high-energy components and the formation of relativistic jets to find out whether radio IR optical non-thermal components and the gamma-ray events originate -as found in quasars- within the same shocked area downstream the relativistic jet. Our multiwavelength recent results (Cadolle Bel et al. 2007 2008 2009  Prat et al. 2009a) prove the importance and feasibility of such campaigns. Therefore in the framework of ToO observations we aim to analyze INTEGRAL data of up to two (new or known) BHXN simultaneously with our accepted ground-based programs we can trigger at any time as successfully performed in the past. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-divusum
title: 0740013

description: We propose a Target of Opportunity Observation whenever one of the Known Accreting Pulsars enters an outburst. Part of the proposal are also the New Accreting Pulsars discovered by INTEGRAL or any othercurrent High Energy mission. We request a total of 800 ksec divided into: (a) three deep observations 400 ksec in total to be performed at the rise (100 ks) at the peak (100 ks) and at low luminosity in the declining phase of the outburst (200 ks)  (b) a series of eight pointings (50 ksec each) to monitor the source along the outburst.   The science goals of the proposal are: (1) The understanding of the accretion regime super- vs. sub-Eddington through the monitoring of the spectral parameters (mainly the cyclotron line parameters) along the outburst. (2) The study of magnetospheric instabilities through the observations of the recently discovered flares in the rising part of the outburst. (3) The study of the geometry/physics of the emission through the observation with high statistics at different luminosities of the phase dependence of the spectral parameters as well as of the energy dependent pulse profiles. This allows the measurement of the line shapes of the CRSFs (fundamental and harmonics)  to test the theoretical models proposed for line formation. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dj67xlq
title: 8860036

description: OMC FF sequence.Contains a sequence of 5 FF observations followed by short observation with OMC in standbyfollowed by DC calibration observationfollowed by short observation with OMC in standbyobservation scheduling constraints: at least 10h after perigee and not under Goldstone coverage [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dj7ehdn
title: 1470002

description: Transient follow-up
DOI: 10.57780/esa-djqu3wr
title: 8860068

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-dlicmwo
title: 0420052

description: We propose to conduct 	extbf{fixed-time} observations for 2 uninterrupted INTEGRAL orbits (2 times 233 ks) of hard X-ray eclipse of the galactic microquasar SS433 at the maximum opening disk precessional phase centered on May 2 2007 11:30 GMT with the aim of confirming the unusual shape of theeclipse bottom first discovered by Ginga and suspected by previous INTEGRAL observations. This would allow as to put stringent constraints on the nature of hard X-ray emission region in SS433 discovered by INTEGRAL and to independently evaluate the binary system mass ratio which is a still unsolved controversy for this source. The proposal is not associated with the AO-4 Key Program.  [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dlojqc2
title: 0299924

description: Galactic Centre Deep Exposure for AO 02 and Pattern 24 Cycle 4
DOI: 10.57780/esa-dmp9nm6
title: 1920011

description: One of the most important results on Galactic black holes that has come out of INTEGRAL was the discovery of the signature of strong polarization of the >300 keV spectrum of Cygnus X-1. This discovery is an indication that this spectral component is due to synchrotron emission probably from the radio jet that is present in the hard state. In this two year 2 Ms program we propose a continuation of these measurements with the aim of detecting changes in the hard state polarization properties to set strong limits on the hard tail in the soft state and to break degeneracies between the two families of models for the formation of the hard tail. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dnqlhhc
title: 0399831

description: Galactic Plane Survey for AO 03 and Pattern 31
DOI: 10.57780/esa-don1aaq
title: 1420015

description: Cas A and Tycho are remnants of a core-collapse and type Ia supernova respectively. Radioactive 44Ti has been observed from these two relatively young supernova remnants and is believed to originate from the deep interiors of supernova explosions representing physical conditions that are otherwise difficult to explore if at all.Here we propose to simultaneously observe Cassiopeia A and Tycho in order to (1) bring Cas A results to sufficient quality for line shape and line ratio tests that can probe inner ejecta kinematics in unique ways and (2) obtain sufficient exposure for Tycho to confirm the results reported from other instruments in the hard X-ray range. 44Ti nucleosynthesis is assumed to occur in alpha-rich freeze-out from Si burning or NSE burning and was believed to be characteristic for core-collapse interiors. However in the Galaxy feewer 44Ti bright sources are seen than expected from core-collapse supernova statistics. Moreover the detection of 44Ti from Tycho a SN Ia remnant adds to the puzzle of 44Ti synthesis and the origins of cosmic 44Ca. Additionally the survey in 511 keV emission from positron annihilation with INTEGRAL has shown the disk being a rather faint source of positron annihilation emission leading to the question if positrons from radioactive decays of + unstable isotopes may be contained in their sources and not leak out into interstellar medium of the Galaxys disk. Our planned observations will (4) constrain any local positron annihilation in the remnant itself thus possibly explain the disk faintness in 511 keV gamma-rays. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dpqfn8l
title: 8860016

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 180. 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-dqwq589
title: 0520032

description: We propose to observe the peculiar accreting X-ray pulsar X-Per  three times for 200 ksec each resulting in a total exposure time  of 600 ksec. This will be the first Integral observation of the  Perseus region -- there are currently neither public nor private  data available within 8 degrees of X-Per. This 600 ksec long  observation will therefore not only allow us to perform  phase-resolved spectroscopy to study the cyclotron line at 30 keV  to search for a harmonic line and to determine the high energy  continuum of the source to study the abnormal spectral shape from  2 keV up to 100 keV but also to get a first deep view of the  Perseus region with the possibility to discover new  sources. Performing three separated observations will allow us to sample the  binary orbit at no extra cost. This proposal was accepted in AO4 in  category B but was not performed to date. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-drj6e6n
title: 0060010

description: Calibration observation 5: 200 ksec observation onaxis Cygnus X-1 with hex dither to study the PSF extended and line emissionthe imaging capabilities in crowded fields cross calibratoin 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-dsmh91h
title: 8860342

description: Crab calibration 2017.1 (1784-85) - JEM-X
DOI: 10.57780/esa-du0616k
title: 8860143

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-dxtukbk
title: 0299849

description: Galactic Plane Survey for AO 02 and Pattern 49
DOI: 10.57780/esa-dzl1cek
title: 2020021

description: As a follow-up of our earlier observations (2 Ms scheduled in AO-1 2.5 Ms in AO-2 2 Ms in AO-3 932 ks in AO-14 1.181 Ms in AO-15 1.173 Ms in AO-16 1.568 Ms in AO-17 520 ks in AO-18 1 Ms in AO-19) we propose a new deep 1.0 Ms exposure of the Galactic Center (GC) field which corresponds to 5% share of the total time available for this target in AO-20. Observations of the GC region make the best usage of the unique INTEGRAL capabilities and undoubtedly are the most efficient investment of its observing time. The main objectives of the proposed observations are the monitoring of Sgr A* and more than three dozens of black holes or other peculiar X-ray binaries including a search for new transient sources and phenomena. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-e0p5nqb
title: 0399811

description: Galactic Plane Survey for AO 03 and Pattern 11
DOI: 10.57780/esa-e0xpamy
title: 1870009

description: INTEGRAL TOO observations of 4U 1820-30
DOI: 10.57780/esa-e26kqzi
title: 0420062

description: We propose to carry out an INTEGRAL observation of Sgr A* simultaneously with an approved XMM-Newton large project (200 ks exposure) and the associated multiwavelength campaign planned for spring 2007. The primary aim of this program is the study of the combined X-ray/Gamma-ray flaring  activity of SgrA* the radiative manifestation of the supermassive black hole at the galactic center.The discovery of several bright and hard X-ray flares from Sgr A* with Chandra and XMM-Newton have opened new perspectives in understanding the processes at work in the accreting supermassive black hole of the galactic center. The deep INTEGRAL monitoring of the Galactic Center performed in 2003-2004 led to the discovery of emission at energies >20 keV in the direction of the Sgr A complex (the source IGR J1745.6-2901). This excess appears to be constant and it is possibly not associated with the activity of SgrA* but it is still essential to carefully check this hypothesis by searching for IGR J1745.6-2901 gamma-ray variability at the times when Sgr A* is seen to flare in X-rays.The previous coordinated XMM-INTEGRAL campaign aimed to carry out this program failed in resolving this issue because quite unluckily both the bright X-ray flares seen with XMM occurred when INTEGRAL was in the radiation belts. A new campaign with XMM-Newton and HST has been planned for spring 2007 and we propose to perform again coordinated INTEGRAL - XMM observations to search for gamma-ray variability correlated to the X-ray flares. Simultaneous detection of Sgr A* X-ray flares with INTEGRAL even more if coupled to simultaneous infrared and sub-mm observations will be invaluable in assessing the emission models at work in this source. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-e297fc2
title: 1320004

description: Cas A and Tycho are remnants of a core-collapse and type Ia supernova respectively. Radioactive 44Ti has been observed from these two relatively young supernova remnants and is believed to originate from the deep interiors of supernova explosions representing physical conditions that are otherwise difficult to explore if at all.Here we propose to simultaneously observe Cassiopeia A and Tycho in order to (1) bring Cas A results to sufficient quality for line shape and line ratio tests that can probe inner ejecta kinematics in unique ways and (2) obtain sufficient exposure for Tycho to confirm the results reported from other instruments in the hard X-ray range. 44Ti nucleosynthesis is assumed to occur in alpha-rich freeze-out from Si burning or NSE burning and was believed to be characteristic for core-collapse interiors. However in the Galaxy feewer 44Ti bright sources are seen than expected from core-collapse supernova statistics. Moreover the detection of 44Ti from Tycho a SN Ia remnant adds to the puzzle of 44Ti synthesis and the origins of cosmic 44Ca. Additionally the survey in 511 keV emission from positron annihilation with INTEGRAL has shown the disk being a rather faint source of positron annihilation emission leading to the question if positrons from radioactive decays of + unstable isotopes may be contained in their sources and not leak out into interstellar medium of the Galaxys disk. Our planned observations will (4) constrain any local positron annihilation in the remnant itself thus possibly explain the disk faintness in 511 keV gamma-rays. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-e40afbj
title: 1860001

description: Crab monitoring
DOI: 10.57780/esa-e549la9
title: 1220006

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 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. Previous observations led to ~3 Ms of exposure resulting in a tantalizing hint of the expected signal. With our proposed deepening of exposure (3 Ms in AO-10) we aim to measure the intensity (from AO-10/11  2.3 Ms only done up to now) and kinematics (later from more AO-12 observations) of this nearby 26Al source with INTEGRAL. We aim at unique data for ISM dynamics and massive stars as its driving engines within INTEGRALs lifetime  there is hardly a more suitable and closer target region. These observations also support 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  moreover over 30 Fermi sources can be studied within our target region. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-e6j7trq
title: 0320010

description: We ask for 3 observations of 300 ks each to observe in target-of-opportunity (TOO) up to 3 blazars conditional to stringent and well defined triggering criteria based on optical X-ray or gamma-ray brightening. Serendipitous detections of bright blazars by INTEGRAL itself and by Swift/BAT will also be instrumental to TOO activation. By coordinating these INTEGRAL observations with XMM-Newton campaigns and by complementing these with monitoring at TeV optical and radio frequencies we will guarantee the coverage of a broad energy range. This will allow us to follow the evolution of the overall spectral distribution of blazars during a flare episode and thus constrain the time-dependent parameters of the emission model.=======Please note that the exposures indicated in the Observation Details Panel are purely indicative only to fill the form. The required time is 3 observation of 300 ks each in ToO. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ea6wa0p
title: 0299846

description: Galactic Plane Survey for AO 02 and Pattern 46
DOI: 10.57780/esa-eautjs9
title: 0399822

description: Galactic Plane Survey for AO 03 and Pattern 22
DOI: 10.57780/esa-eflcygi
title: 1020027

description: According to the standard lore gamma-ray emission from blazars originates in jets blazars show accretion rates far below the Eddington limit and the accretion flow forms a torus. The Narrow-Line Seyfert 1 galaxy 1H0323+342 member of a new class of gamma-ray emitting AGN does not fit into this picture: it shows near-Eddington accretion rate from an optically thick disk showing at the same time gamma-ray emission. Moreover 1H0323+342 seems to represent a transitional case in which the inner disk heats up and blows up to a torus configuration as the accretion rate goes down (or vice versa). Thus 1H0323+342 is the best target among the four gamma-ray bright Narrow-Line Seyfert 1 galaxies for its brightness and for its variability: in order to be able to study the disk/jet coupling and overall which condition take to the emerging of the jet over the disk spectrum it is mandatory to perform simultaneous multiwavelenth observations and among them the hard X-ray band is particularily r^ant: this is the scope of this proposal. Integral observations will be a crucial point in the success of the multiwavelength campaign on 1H0323+342 that will shed light on this jet/disk paradigm. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-efstt4v
title: 8860238

description: Crab 2011: SPI/IBIS 5x5 wide rev 1089
DOI: 10.57780/esa-eiq1l7m
title: 0220154

description: We propose an INTEGRAL observation of the cluster of galaxies withpowerful radio halo Coma. A detection of the hard X-ray emission from this clusters at $Esim100$~keV will allow us to distinguishbetween different mechanisms of generation of the hard X-rayemission (e.g. inverse Compton vs. suprathermal bremsstrahlung) and to derive the enrgy densities of the magnetic field and relativistic particles in the intracluster medium. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ej8tajw
title: 1270003

description: Public TOO on BH transient V404 Cyg (GS 2023+338) in outburst
DOI: 10.57780/esa-ejk8chi
title: 1270011

description: We propose to perform TOO observations of the transient X-ray pulsar V0332+53 in the subcritical regime (never observed before). The purpose of these observations is to measure the cyclotron line energy in this lowest observable state. The INTEGRAL measurements will be used jointly with our NuSTAR/Swift/XMM-Newton program for searching the critical luminosity in X-ray pulsars. To reconstruct the broad-band spectrum accurately we ask about the entire INTEGRAL revolution (~170 ksec) with the hexagonal dither pattern. The expected source flux is about 15-20 mCrab in the 17-60 keV energy band. Due to limitations of the source visibility with INTEGRAL and the flux decay we ask to perform observatiosn asap (preferably in the revolution 1596)     [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ekdfvhm
title: 8860230

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