cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-vwutbd9
title: 0520071

description: This proposal is a continuation of the on-going (AO4) program of making a several Msec long series of multiple latitude scans of selected regions of the Galactic disk. This technique of studying the extended high-energy emission of the Galaxy has proved to be very successful in minimizing systematic errors associated with the SPI and ISGRI detectors background variations and thus providing a clean emission spectrum of the Galactic disk limited only by the photon counting statistics. In this proposal a region of the Galactic disk outside the central bulge at l~40 is selected.  The ultimate goal of the entire project is to have model independent and systematics free measurements of the fluxes in nuclear lines and a broad band spectrum of the Galactic background emission. The proposed scanning technique is at present the only proven way to achieve these goals without hitting the systematics limit. Comparison of these data with the existing deep observations of the central Galactic bulge and the inner part of the Galactic disk (AO4) will allow one to address the most fundamental questions facing INTEGRAL: i) clarify the role of stellar nucleosynthesis in the production of positrons ii) place tight constraints on the fate of the positrons iii) allow a detailed comparison between the A26 and Fe60 nuclear lines emission and the star formation rate in different parts of the Galactic disk iv) provide the most accurate measurement of the Galactic hard X-ray and gamma ray diffuse emission and measure or put an upper limit on the population of low energy cosmic rays in the Galaxy which cannot be measured my other means.   Taking into account the unique combination of properties of INTEGRAL instruments the proposed strategy is the best possible usage of the INTEGRAL time. Proposed observations will provide results on the high energy properties of the Milky Way that will not be overcome for decades and will therefore build up [truncated! Please see actual data for full text]
DOI: 10.57780/esa-vz3hbj9
title: 0120036

description: Neutron capture processes can be expected in any situation where neutrons are accelerated to high energies and rapidly thermalized in a sufficiently dense medium.  Solar flare spectra for example are often dominated by the presence of very strong narow line emission at 2.2 MeV resulting from neutron capture on hydrogen.  These observations indicate the importance  of neutron capture measurements as a tracer of energetic particle interactions.  This provides a strong motivation to search for observable emission in other (non-solar) astrophysical sources where compact binary systems or stelllar flares represent potential sites of measurable 2.2 MeV emission.      A previous analysis of data from the COMPTEL experiment on CGRO led to the first all-sky map of 2.2 MeV line emission. The map was nearly featureless with only one significant point-like feature. This source (GRO J0332-87) has been tentatively associated with the unusual white dwarf object RE 0317-853.  It has further been speculated that the 2.2 MeV emission may result from some type of flaring proces near the surface of a white dwarf.Here we propose an observation of the 2.2 MeV point-source candidate by the IBIS/SPI instruments on INTEGRAL. The purpose of this observation will be three-fold: 1) to provide an independent confirmation of the COMPTEL source  2) to further define the characteristics of the source (energy spectrum location)  and 3) to test for source variability.  Observations with INTEGRAL will take advantage of the unique capabilities of SPI for acquiring high sensitivity data with both high energy and angular resolution.  In addition observations with JME-X and IBIS will permit a sensitive search for energetic sources that might be related to the observed COMPTEL source irrespective of the results from SPI. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-vzg0mcc
title: 0420073

description: We propose a VERY long (4-6 Msec) project of repeated latitude scans of a selected region of the Galactic Disk outside the central bulge. The rapid  latitude scans are intended to minimize any possible systematics associated with the SPI and ISGRI detectors background variations thus providing a clean emission spectrum of this portion of the Galactic disk limited only by the photon counting statistics.The ultimate goal is to have a model independent measurements of the disk positron annihilation emission 1.8 MeV Al26 and 1.17 MeV and 1.33 MeV Fe60 lines fluxes and a broad band spectrum of the Galactic Ridge emission believed to be due to weak compact X-ray sources and Cosmic Rays at low and high energies respectively. The proposed strategy is the only reliable way to achieve these goals without hitting the systematics limit.A further comparison of these data with the existing deep observations of the central Galactic Bulge would address the most fundamental questions facing the INTEGRAL: i) clarify the role of stellar nucleosynthesis in the production of positrons and the relation between the Galactic Disk and Bulge ii) place tight constraints on the fate of the positrons iii) allow a detailed comparison between Al26 and Fe60 nuclear lines emission and star formation rate in the disk iv) provide robust conclusion on the nature of the hard Ridge emission. As a secondary science we anticipate discovery of a number of new extragalactic objects in very interesting region of thelocal Universe -- the Great Attractor.   The proposed observations making the best possible use of the INTEGRALcapabilities and will remain an extremely valuable source ofinformation on the High Energy properties of the Milky Way for decadesto come.  [truncated! Please see actual data for full text]
DOI: 10.5284/1128374
title: Data from a Trial Trench Evaluation at Harvil Road Woodland, London Borough of Hillingdon, 2018-2022 (HS2 Phase One)

description: This collection comprises of images, site records and an archive decision sheet from a trial trench evaluation carried out by COPA (Cotswold Oxford Pre-Construct Archaeology) at Harvil Road Woodland, London Borough of Hillingdon, during March 2018.
DOI: 10.57780/esa-w39dj2n
title: 0110010

description: The prime objective of this proposal is to perform INTEGRAL pointed follow-up observations of targets of opportunity (TOO) mainly discovered during the Core Prgrammes GPS and GCDE or discovered using other space and ground observatories. All observations contained in this proposal are part of the INTEGRAL Guaranteed Time Programme (Core Programme). [truncated! Please see actual data for full text]
DOI: 10.57780/esa-w51wpkw
title: 1260001

description: Coordinated observations of 3C 273:  a cross-calibration campaign on 3C 273 involving Chandra XMM Nustar INTEGRAL and possibly Suzaku will be carried out on July 2015.
DOI: 10.57780/esa-w5kkinu
title: 1220011

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-wbrpvp0
title: 0299827

description: Galactic Plane Survey for AO 02 and Pattern 27
DOI: 10.57780/esa-wco39h1
title: 1470003

description: Observations of GRS 1915+105 simultaneous with an AstroSat guaranteed time observation to allow cross-calibration of the energy response at different flux levels especially with AstroSat/LAXPC (3-80 keV). [truncated! Please see actual data for full text]
DOI: 10.57780/esa-wd1fkb7
title: 2070014

description: INTEGRAL TOO observations of Swikft J1727.8-1613
DOI: 10.57780/esa-wgxlelj
title: 0299852

description: Galactic Plane Survey for AO 02 and Pattern 52
DOI: 10.57780/esa-witfjif
title: 0631000

description: A deep observation of the North Ecliptic Pole is proposed. The aim is to reach a factor ~10 lower in flux than achieved previously. A considerable number of new  faint sources are expected which will be used to test the validity of population  synthesis models which try toreproduce the X-ray background spectrum. Some of the faint sources  will be Compton-thick AGN. The sample of sources will also be used to study the dependence  of the obscured-to unobscured AGN ratio with either redshift and/or luminosity and thus to test the AGN unification model. The good high-energy response of IBIS and SPI will  be used to test the presence of a high-energy (>100 keV) cut-off in the AGN spectra of  the brightest objects and in the stacked spectrum of all the detected AGN. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-wn2j9js
title: 0820037

description: This proposal is a one of three accompanying proposals aimed on obtaining legacy-level observational datasets on the Milky Way Galactic disk. The ultimate goal of the entire project (which started in AO4 and which we plan to continue it in subsequent AOs) is to have model  independent and systematics free measurements of the fluxes in nuclear lines (511 keV annihilation emission 1.8 MeV 26Al and 1.17 MeV and 1.33 MeV 60Fe 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. Our strategy was supported by INTEGRAL TACs during previous AOs and now we propose to continue the coverage of the Galactic disk with scanning observations.  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 descrete sources from the total measured photon flux the proposed strategy is the best possible usage of the valuable INTEGRAL time.In this proposal we ask for 2 Msec observations of Galactic region at l=-22.5 deg which will be complimentary to the already performed observations of the inner Galaxy at l~40 22.5 and -45 deg. Having two model-independent systematics free and symmetric (l=+/- 22.5 deg) measurements of the 511 keV annihilation line flux we will put strong constrains on symmetry of line emission. This proposal will provide complimentary data to the accepted AO6 KP proposal of G. Weidenspointner (ID: 06K0003) which scans the Galaxy along the plane. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-wom1my4
title: 8860191

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-wongka7
title: 8860057

description: Crab  on-axis staring  IBIS rise-time selection to be changed usingIBIS on-board software patch  for this obs only
DOI: 10.57780/esa-wpf07w7
title: 1020021

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-wpyy36i
title: 1240026

description: There is good evidence that Anomalous X-ray Pulsars (AXPs) and 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 (10^13-15 G). Magnetars go through phases of intense activity during which they may emit a few up to hundreds of bursts within a period of weeks to months and at the same time they can increase their persistent flux by more than two orders of magnitude.  During those periods they exhibit properties which are quite different from those in quiescence. Their strong magnetic fields are probably mainly responsible for these changes and accordingly it is interesting to study them intensively at those times. In addition the discovery of transient magnetars has opened a new perspective in the field.  This proposal is aimed at gathering new insights on the physics of magnetars through the study of the multi-band spectrum of the initial phase of their outbursts. We request four 200 ks ToO INTEGRAL observations to be triggered by an X-ray flux increase or burst activation from known and new magnetars. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-wqx2opg
title: 1020008

description: The nature of ultraluminous X-ray sources (ULXs) remains unknown. We do not know whether they host stellar- or intermediate-mass black holes nor do we have a clear understanding of the accretion process. Similarly poorly studied is accretion onto supermassive black holes in low-luminosity active galactic nuclei (LLAGN). To address these problems high-sensitivity observations at energies above 10 keV are needed. We propose to add 2+2 Ms of exposure with INTEGRAL in AO9 and AO10 to a 4 Ms    exposure to be accumulated in AO7 and AO8 in a unique field where two of the brightest ULXs M82 X-1 and Holmberg IX X-1 and one of the brightest LLAGN M81 are located. We will measure the spectra of these sources in the 3-100 keV energy band and study their spectral variability. A preliminary analysis of ~2.5 Ms of observations provided to us so far confirms the feasibility of achieving our scientific goals. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-wsthepw
title: 8860318

description: Crab Calibration 2016.1 (1661-1662): JEM-X
DOI: 10.57780/esa-wvdszdy
title: 2020006

description: The final frontier for MeV astrophysics is to observe extragalactic extended emission. Normal type grand spiral galaxies such as the Andromeda galaxy (M31) remain terra incognita in the MeV range and therefore put a question mark on the benchmark character of the Milky Way (MW) MeV emission. Albeit huge scientific potential in the observations of other galaxies can be expected the useful observation time of M31 with SPI is only 200 ks. M31 has an apparent extent of 3.2 deg making it difficult to observe as a whole for ISGRI with its angular resolution of 12 arcsin. ISGRI found ten sources coincident with the extent of M31 however its diffuse emission is still unknown making it an ideal target for SPI with its wider angular resolution of 2.7 deg.Continuum emission from a variety of processes may be within reach in a dedicated observation campaign: Extrapolating GeV observations to the MeV band M31 could have a flux on the order of 1e-8 to 1e-2 ph/cm2/s/keV in the band 0.02-1 MeV. Our current SPI analysis translates to tight constraints about dark matter (DM) either in the form of particles or primordial black holes (PBHs): In particular our limits are already now compatible with measurements from NuSTAR the Voyager probes and the CMB. The accompanying annihilation of electrons with positrons would result in a narrow and blue-shifted 511 keV line with a flux on the order of 1e-5 ph/cm/2 within reach with additional exposure time. Because M31s stellar mass is ten times larger than the MW and because strong GeV emission has been found in M31 probably related to millisecond pulsars the 511 keV line can be expected 20 more luminous than in the MW resulting in a flux of 1e-5 ph/cm/2 independent of any DM contributions.Here we propose to make use SPI to observe the diffuse emission of M31 in a dedicated campaign. With an observation time of 1 Ms the current exposure would be sextupled and hence the sensiti [truncated! Please see actual data for full text]
DOI: 10.57780/esa-wx3ddm4
title: 1920020

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 1.6 Ms in AO-14 1.6 Ms in AO-15 2.0 Ms in AO-16 1.6 Ms in AO-17 1.0 Ms in AO-18) we propose a new deep 1.0 Msec exposure of the Galactic Center (GC) field which corresponds to 15% share time in the total available for this target in AO-19. Observations of the GC region make the best use of the unique INTEGRAL capabilities and undoubtedly are the most efficient investment of its precious observing time. The main objectives of the proposed observations are the monitoring of Sgr A* and three dozens of black-hole 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-x1appj6
title: 0634000

description: AO-6 Key Programme 5: SMC/47 TucWe propose Key Programme status for the field containing 47 Tuc which is the best studied globular cluster in most wavelengths.  Our major goal is to understand whether millisecond pulsars can be a strong source of 511 keV annihilation line emission as this is the most easily testable of the viable mechanisms for producing the annihilation line emission proposed from the Galactic Center region -- because 47 Tuc is substantially closer to us than is the Galactic Center and all its emission fits within a single SPI beam a 2 Megasecond SPI observation should yield a detection of 511 keV emission from 47 Tuc if millisecond pulsars are the dominant source of 511 keV emission from the Galactic Center.  Understanding the Galactic Center 511 keV emission is a crucial goal: if we can eliminate mundane possibilities such as pulsar winds and positrons generated in black hole X-ray binary jets then we can begin to take very seriously the possibility that this emission is indicating the decay of some exotic form of dark matter.  Additionally most of the Small Magellanic Cloud (including the Bar the highest star formation rate region) fits comfortably within the INTEGRAL field of view if 47 Tuc is the primary target.  Because this region of the sky has a large number of relatively short visibility windows executing this program will require roughly weekly observations of 45 kiloseconds which is optimal for discovering bright transients in the SMC and does no harm to the science goals of detecting annihilation line emission from 47 Tuc and of making a deep survey of the persistent emission of the SMC. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-x1k1ak3
title: 8860137

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-x1r8n5q
title: 8860296

description: OMC FF sequence ISOC V10 onwards: sequence of ff measurements with LED on/off followed by a DC cal.
DOI: 10.57780/esa-x2zois8
title: 0820024

description: Building on our successful AO-6 and AO-7 observations we propose a similar observational program dedicated to determining the longitude profile of the asymmetric positron annihilation line radiation from the inner Galaxy first reported by Weidenspointner et al. 2008. Crucial measurements to achieve this goal can be made by applying the successful chopping pointing strategy to fields at (lb)= (+/-15deg0deg) that cover both the inner disk as well as the outer bulge region for a total of 5 Ms. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-x35snup
title: 8860281

description: Crab 2013: JEM-X Staring rev 1268
DOI: 10.57780/esa-x4v2bsf
title: 8860228

description: Crab 2011: JEM-X DV Voltage rev 1019
DOI: 10.57780/esa-x6ajhs5
title: 1440024

description: We propose prompt searches for X-ray and optical counterparts to IceCube high-energy astrophysical neutrinos with INTEGRAL. The astrophysical flux of high-energy neutrinos discovered by IceCube (Aarsten et al. 2013 Science 22 342) is expected to help us reveal the elusive sources of cosmic rays. While no neutrino point-sources have been detected so far a significant increase in the sensitivity of this study can be obtained by performing electromagnetic (EM) observations of IceCube neutrino positions to search for transient emitters. The IceCube observatory has implemented a system of realtime alerts that will broadcast the positions of candidate astrophysical neutrinos to the community. We will use these public alerts to trigger target-of-opportunity (ToO) observations with the INTEGRAL satellite. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-x74dbzu
title: 1420029

description: We propose an INTEGRAL-multiwavelengh monitoring of GRS 1915+105 with the goal to understand the tight connections that exist between the different emitting media and placed in a broader context understand accreting-ejecting sources in general. After a succesfull campaign in the past here we propose to renew this type of monitoring taking advantage of new facilities (especially the Sardinia radio telescope in the radio domain) while tentatively increasing the number of wavelengths covered by including infrared (ESO facilities) and gamma-ray (Fermi) observations. Other X-ray facilities will also be considered. We require 45 ks pointings taken every second revolution in order to 1) probe the physics of accretion by studying the X-ray emission of the source 2) study the origin of the high variability of GRS 1915+105 3) understand the connections between accretion and ejection processes and 4) constrain physical models of emission processes. Points 1) and 2) can be done by looking into the interplay between the soft and hard X-ray emitters (therefore with JEM-X and IBIS) point 3) needs contemporaneous X-ray/radio/IR coverage and point 4) will make use of Fermi-INTEGRAL observations. Besides these specific points this monitoring will allow us to accumulate more data and thus have a better view of the (rather unknown) behaviour of this source beyond 200 keV.  It should be noted that GRS 1915+105 lies in a quite crowded field with many variable sources such as X-ray binaries of all types the enigmatic microquasar SS 433 and a couple of highly absorbed IGR sources. This survey will also  permit all these sources to be studied in a regular manner. Such a monitoring will greatly participate to the INTEGRAL legacy by bringing new data on a dozen of exciting Galactic sources. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-x9rsqlm
title: 8860094

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-xcng1sd
title: 0399804

description: Galactic Plane Survey for AO 03 and Pattern 04