cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-xfpxne9
title: 0520028

description: We propose INTEGRAL observations of theaccreting binary X-ray pulsar Her X-1 for a total of 460 ks in its Main-On state. The main goal is to answer a number of fundamental questions related to the class of accreting binary X-ray pulsars e.g.: Is the neutron star in Her X-1 indeed precessing freely? and What isthe exact physics in the magnetized accretion column generating spectra with cyclotron lines?We propose to study systematic variations with time and with precessional phase of the cyclotron line feature the hard X-ray pulse profile and the pulse period. Such observations will exploit two unique features of INTEGRAL: its excellent energy and time resolution and the capability toperform long uninterrupted observations. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-xfwmo5i
title: 0720009

description: We request one INTEGRAL observation of 250 ksec of thebright Seyfert 2 galaxy NGC 2110. Previous observations by  BeppoSAX showed a complex X-ray spectrum but did not extend significantly above 100 keV in order to study the continuum and determine the turnover (cut-off) in the hard X-ray band. An AO-6 combined INTEGRAL (250 ksec) and Swift (2.2 ksec) observation of NGC 2110 showed a cut-off at 90 keV but displayed little reflection (R < 0.3) and no fluorescence line. INTEGRAL offers the unique possibility to study the physics involved in absorbed AGN and even enables us to study the connection between flux variation high-energy cut-off reflection component and iron fluorescence line. The variation in flux between and during the proposed and previous observation in various energy bands can reveal the geometry of this source. The two separate observations will most likely catch the source in two different states allowing to further constrain the connection between high energy spectrum and reprocessing. The proposed observation will put tighter constraints on the reflection component and/or will show spectral variability within this object. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-xhy30gw
title: 0229700

description: This is an artificial proposal
DOI: 10.57780/esa-xn0ai45
title: 0399913

description: Norma arm Proposal for AO 03 Cycle 1
DOI: 10.57780/esa-xow32de
title: 8860334

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-xqj1lbm
title: 8860195

description: Crab cal. Spring 2010
DOI: 10.57780/esa-xqn91r4
title: 0670001

description: 1E1547.0-5408 in outburst: public TOO
DOI: 10.57780/esa-xr3vr23
title: 8860100

description: Crab 1 deg arc 2006 SpringUsed by IBIS and JEM-X
DOI: 10.57780/esa-xr9jhhm
title: 1470007

description: Hidden TOO on GW event at 41.07 -45.49
DOI: 10.57780/esa-xrik8jy
title: 1970009

description: INTEGRAL TOO observations of Mrk 501
DOI: 10.57780/esa-xtd1m5o
title: 0120112

description: The X-ray flux observed from X-ray transients changes by several orders of magnitude between quiescence and outburst providing an opportunity to learn about black hole candidates (BHCs) accretion onto compact objects and the processes responsible for high energy emission.  The high energy emission provides a probe of the regions of space close to the compact object allowing us to study strong gravity and jet formation processes.  4U 1630-47 is the only BHC X-ray transient that has outbursts which recur on a relatively regular and short time scale.  In addition to having a high level of activity the source produces strong hard X-ray emission and optically thin highly polarized synchrotron radio emission indicating the presence of jets.  We propose to observe 4U 1630-47 with INTEGRAL along with contemporaneous radio observations in order to:  1. measure the properties of high energy emission lines (if they are present) including the narrow electron-positron annihilation line at 511~keV and the 300-500~keV lines of uncertain origin that have been observed in other systems  2. determine the relationship between the radio and high energy emission  and 3. measure the energy spectra in the hard and soft states to place constraints on accretion geometries and emission mechanisms.  The high spectral resolution good sensitivity and broadband capabilities of INTEGRAL are critical for achieving the goals of this proposal. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-xwfqzzq
title: 0399835

description: Galactic Plane Survey for AO 03 and Pattern 35
DOI: 10.57780/esa-xx5uqol
title: 8860158

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-xy2vvje
title: 2070016

description: INTEGRAL TOO observation of GX 339-4 at the early phase of an outburst simultaneous with XMM-Newton
DOI: 10.57780/esa-y2pf30c
title: 8860278

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-y4fbhka
title: 0220114

description: We propose to carry out an INTEGRAL survey of Sgr A* simultaneously with the approved XMM-Newton large project (552 ks) exposure monitoring program of the galactic nucleus and the associated multiwavelength campaign planned for 2004. The primary aim of this program is a detailed study of the X-ray/gamma-ray activity of Sgr A* the radiative manifestation of the massive black hole at the galactic center. Although the galactic nucleus hosts the nearest and probably best studied massive black hole its physical and radiative properties and in particular its low level of high energy emission remain little understood. The discovery of bright and hard X-ray flares from  SgrA* with Chandra and XMM-Newton in the last two years has certainly opened new perspectives in understanding the processes at work in accreting black holes but a number of crucial questions remain unaswered. Recent INTEGRAL observation of the Galactic Center have led to the discovery of a significant excess at energies > 20 keV in direction of the Sgr A complex. This excess appears to be variable and it is probably associated with the activity of Sgr A*. Simultaneous observations of Sgr A* with INTEGRAL and XMM-Newton will allow to verify the association of the INTEGRAL source with Sgr A* and thus to provide a measure of the gamma-ray emission from the galactic nucleus. The broad band data that will be obtained through this program especially if coupled to simultaneous infrared and sub-mm observations will be invaluable in assessig the validity of the principal emission models for Sgr A* i.e. boosted jets or accretion flow and in understanding other issues related to low accretion rates in compact objects. The Sgr  region has already been observed with INTEGRAL in 2003  and it will be observed again in the course of the GCDE in 2004. However the herein proposed program requires performing the INTEGRAL observations simultaneously to the planned XMM ob [truncated! Please see actual data for full text]
DOI: 10.34810/data59/1
title: Data-MethodRecoveryAdipocytes-2016-09.tab
DOI: 10.57780/esa-y51o0lz
title: 8860229

description: Crab 2011: JEM-X Diagnostic Mode rev 1019
DOI: 10.57780/esa-y5drn8z
title: 1770011

description: INTEGRAL Observation of Sco X-1Observation to allow z-flip strategy
DOI: 10.57780/esa-y6xbz5y
title: 8860253

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-y79awq5
title: 8860254

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-y96z6z1
title: 8860092

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-y9tiwyb
title: 8860305

description: Crab 2013: SPI/IBIS 5x5 wide rev 1268 and 1269
DOI: 10.57780/esa-ya4z200
title: 0299916

description: Galactic Centre Deep Exposure for AO 02 and Pattern 16
DOI: 10.57780/esa-yam43mf
title: 0620021

description: GRS 1915+105 can be considered as the prototype microquasar. It does in short times what other sources do over several days or more. We hence can catch these variations very easily with pointing INTEGRAL and thus have a unique chance to understand their physical origin through a broad band (spectral and temporal) study  of the source. Placed in a multiwavelength context this will permit us to understand the tight connections that exist between the different emitting media. Understanding this source will help us understand all microquasars. After very successful results obtained in the past AOs we propose to continue the monitoring of  GRS 1915+105 and its surroundings during AO6. We plan to (quasi-)simultaneously observe the source  in the broadest waveband ever achieved from radio (Ryle GBT) to gamma-ray (GLAST) with special emphasis in the X-ray domain (INTEGRAL and possibly RXTE). We require 20 ks INTEGRAL pointings taken every second revolution in order to  understand the origin of the high variability of GRS 1915+105 at X-ray energies. These coupled to observations at other wavelengths will permit us to probe the physical mechanisms at work in this source: the connections between accretion and ejection processes the emission processes at high energy the origin of the X-ray spectral transitions and  that of the variabilities.   The latter two points will be based on the co-use of JEM-X in the soft X-rays and IBIS in the hard X/Gamma-rays and on a simultaneous approach with RXTE. We aim at studying the interplay between the soft and hard X-ray components the different time scales of their variations in relation with different physical models. For the study of the accretion-ejection mechanisms we  will provide simultaneous radio (Ryle GBT) and infrared (ESO) observations while the very high energy (with GLAST) will allow us to discriminates among different radiationprocesses and thus different mode [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ybkl8tb
title: 1120025

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) and kinematics (later from more AO-11 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-ybwzeu5
title: 0920022

description: We propose an additional deep 3.0 Msec exposure of the Large Magellanic Cloud in order 1). to confidently detect and precisely measure the flux from SN 1987A in the direct-escape lines of radioactive Ti-44 (lines at 67.9 78.4 and 511 keV) 2). to study possible hard X-ray emission produced by cosmic-rays accelerated in the ejecta blast wave interacting with the ``inner equatorial ring of circumstellar material of SNR 1987A 3) to search for hard emission from the stellar remnant of this supernova (or significantly improve the existing upper limit). This proposal is a continuation of our proposals approved by TAC in AO-7 (for observations with a 2.0 Msec exposure) and AO-8 (for observations with a 1.5 Msec exposure). If the additional 3.0 Msec observations of the region will be carried out in AO-9 the total exposure for SN1987A will be increased till 9 Msec - by a factor of 2 relatively the presently available one - that will allow INTEGRAL to confidently detect the Ti-44 radioactive lines. In addition to the above (main) purposes of the proposals we will try to detect an electron-positron annihilation line from the dark bulge of the LMC (testing the hypothesis that the line can be produced in the LMC and in the Galactic center by dark matter annihilation). The deep observation of the LMC will also allow ones to monitor X-ray variability of a number of compact X-ray sources present in the field and search for new X-ray transients and weak sources. This observation makes the best use of the unique INTEGRAL capabilities and undoubtedly is the most efficient investment of its precious observing time. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ycwsftr
title: 8860215

description: Crab cal. Spring 2010
DOI: 10.57780/esa-yh0rcsq
title: 1320001

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 180 of them with one hexagonal pattern about every 3 days whenever the region 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 is providing 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. As a service to the scientific community the observations are to be made public. We will continue to make the IBIS/ISGRI and JEM-X quick-look results publicly available through the web soon after the data have been taken to preserve the possibility for rapid follow-up by the community. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-yh587sz
title: 8860161

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-yihamx3
title: 8860042

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-yiq2vsg
title: 0399932

description: Scutum arm Proposal for AO 03 Cycle 3
DOI: 10.57780/esa-yl8xrqi
title: 0820014

description: This proposal aims at obtaining the deepest hard X-ray extragalactic survey at studying the keV to GeV spectrum and hard X-ray variability of the brightest quasar 3C 273 and at measuring annihilation and hard X-ray emission from the central region of the Virgo cluster. Current INTEGRAL observations of the 3C 273 field already provide the deepest hard X-ray extragalactic survey ever made. With the additional exposure we aim at reaching a flux limit of 0.1 mCrab. This will allow to detect sources with typical luminosity up to a redshift of 0.1 probing the evolution of AGN in the hard X-rays over the last billion years. It will also allow to study the implication of absorption for the cosmic X-ray background the absorption/luminosity relationship and the local AGN luminosity function. SPI is the only available instrument for the next decades to be able to detect the presence of anti-matter in the jet of 3C 273. This detection would have profound implications on models explaining jet creation acceleration and collimation as well as the high-energy emission of AGN. The three other instruments of INTEGRAL have enough sensitivity to follow the complex spectral variations of 3C 273 from the optical to the hard X-rays in coordination with GeV measurements by Fermi. This is a unique opportunity to study the correlations between the various emission components of 3C 273 from the eV to the GeV range and compare them with model predictions. Such observations have far reaching implications. Key observations will finally be obtained on the hard X-ray emission of M87 probably generated by interaction of its radio bubble and the cooling flow of the Virgo cluster as well as on the expected cluster annihilation emission. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ylt2nkn
title: 1020020

description: This proposal is aimed on obtaining legacy-level observational datasets on the Milky Way Galactic disk.  The ultimate goal of the entire project is to have model independent and systematics free measurements of the fluxes in nuclear lines (511 keV annihilation emission 1.8 MeV Al26 and 1.17 MeV and 1.33 MeV Fe60 lines) and a broad band spectrum of the Galactic background emission which at different energies is provided either by cumulative emission of faint Galactic source or by interaction of low energy cosmic rays with interstellar medium. Taking into account the unique combination of properties of INTEGRAL instruments - broad band coverage large fields of view and possibilities to eliminate the contribution of discrete sources from the total measured photon flux the proposed strategy is the best possible usage of the valuable INTEGRAL time. Wide mapping of the Milky Way during the campaign of Galactic latitude scans also contributes to the legacy of the INTEGRAL observatory giving the opportunity to study the population of Galactic sources at high latitudes. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ymozyqy
title: 1120029

description: For as long as X-ray astronomy exists X-ray (and gamma-ray) astronomers consider the Crab supernova remnant to be a steady standard candle suitable as a calibration source. INTEGRAL has been observing the Crab for mainly calibration purposes only about twice per year for a total of about 4 revolutions per AO. Further observations have been sparse and only every now and then it was in the field of view during a few ad-hoc observations of relatively nearby sources. We propose to monitor the Crab more frequently on a regular basis. The objectives are two-fold: 1) monitor and seek for accompanying flares which have been seen at >100 MeV by Fermi and Agile 2) improve on the (cross-) calibration of the INTEGRAL instruments as well as with other high-energy instruments. We propose to look at the Crab every 4th revolution with a single standard 5x5 pattern for 45 ksec. The data will be made public immediately. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-yncesaf
title: 0399829

description: Galactic Plane Survey for AO 03 and Pattern 29
DOI: 10.57780/esa-ynj611a
title: 1820018

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-ynk7wel
title: 8860091

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-ynp2f56
title: 0320015

description: X-ray emission provides the best tracer of conditions close to the central engines of AGNs. At low energies  AGNs have a power law spectrum modified by the effects of absorption and reflection.  At higher energies in the hard X-ray domain we have access to the intrinsic emission of these sources. We can measure the primary power law the reflection hump and the high energy cutoff. AGNs exhibit also  rapid aperiodic variability for which  no fully satisfying explanation has been advanced. INTEGRAL offers   a unique opportunity for  a wide variety of sensitive X-ray observations to investigate the physical processes at the origin  of  the complex emission of two Seyfert galaxies NGC 2110 and NGC 2992 which   display many  enigmatic  properties. Indeed their Seyfert classification changed from 2 to 1 type without clear explanation and in the case of NGC 2992 a rebuilding of the AGN activity has been observed  in 1998 reaching its flux level of 1978.     We ask for one INTEGRAL observation of 400 ks for each   object  to obtain significant  informations on their high energy emission in particular on the continuum and on  the cutoff  allowing us to study the nature of their central engine.  [truncated! Please see actual data for full text]