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Max-Planck-Institut für extraterrestrische PhysikMPE

- Gamma-Ray Astronomy -

Project:   INTEGRAL
Science from INTEGRAL (
collected&selected by RD/MPE)


  MPE MPE   Group Gamma-Ray Astronomy   Group Projects   Group INTEGRAL  Group Science

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ESA News for general Public


Various Press Releases

INTEGRAL Spectrometer Status
 MPE's Notes

CESR Notes


INTEGRAL Science Chronologyscience

(RD selected science highlights, latest on top; for other highlights/selections see ESA and press release links)
  • The INTEGRAL Science Workshop in Dublin, Ireland, attracts nearly 300 scientists, with stimulating discussions of results among various high-energy missions world-wide (30Sep2010)
  • SPI refines its findings on positron annihilation emission in the inner Galaxy, clearly confirming disk emission at a low level and shallow spatial distribution, and deviations from perfectly-GC-centered emission of the bright bulge (26Sep2010)
  • SPI publishes 26Al spectra Doppler Shifts along the inner Galaxy (INTEGRAL picture of the month Oct2010) (20Sep2010)
  • SPI finds 26Al emission from nearby nucleosynthesis of the Scorpius-Centaurus region (23Feb2010)
  • SPI publishes 26Al spectra for different regions along the plane of the Galaxy (INTEGRAL picture of the month Jun2009) (29Jan2009)
  • SPI on INTEGRAL monitors a flood of outbursts from an AXP/Magnetar (1E1547.0, neutron star with soft X-ray spectrum) which FERMI/GBM had seen to burst already last October. ToO for INTEGRAL will be made on 24Jan (22Jan2009)
  • The INTEGRAL Science Workshop in Copenhagen/Denmark, focussed on 'compact objects', attracts over 150 scientists, and features broad science discussions reaching well beyond the INTEGRAL community. (14Sep2008)
  • Polarized emission from the Crab (see note from Oct 2007 below) is published in 'Science' (ESA Press Release)(29Aug2008)
  • INTEGRAL schedules a ToO for a Soft Gamma-Ray Repeater / Magnetar, discovered with the GBM on the recently-launched Fermi gamma-ray mission (26Aug2008)
  • INTEGRAL schedules a ToO for a rather nearby supernova, SN2008S, probably a type IIn, at 3.8 Mpc distance (4Feb2008)
  • Positron annihilation in the Galaxy's disk appears asymmetric, brighter in the 4th quadrant, and indicating positron origins in binaries (Weidenspointner et al., 2007)(Press Release 10Jan2008)(04Oct2007)
  • IBIS\INTEGRAL surveys the Galaxy's cosmic neighborhood, finding an anisotropy reminiscent of that seen in AUGER's proof of the extragalactic origin of highest-energy cosmic-rays (Krivonos et al. 2007)(ESA Press Release)(17Dec2007)
  • INTEGRAL schedules its first ToO based on an AGILE trigger (Outburst of AGN 3C454.3)(16Nov2007)
  • INTEGRAL "Lustrum" Science workshop in Sardinia celebrated 5 years of INTEGRAL with 72 talks and 26 posters in a 3-day meeting with ~130 participants (ESA Press Release)(19Oct2007)
  • Crab off-pulse polarization (angle ~120deg) now clearly measured with SPI (Dean et al.) and IBIS Compton mode (Grenier et al.)(19Oct2007)
  • INTEGRAL sees ist so far most distant source, and AGN named IGR J22517+2218 at redshift 3.66 (ESA Press Release)(Bassani et al. 2007)(03Oct2007)
  • AGN spectra are found consistent with the X-ray background spectrum, with a high-energy cutoff in their spectra at 100-200 keV and strong AGN luminosity evolution between redshifts 0 and 1 (IBIS analysis; Sazonov et al. 2007)(23Aug2007)
  • The 3rd IBIS source catalogue finds 421 sources, among them unexpected CVs, many AGN populating locations of nearby galaxy clusters, and a rich variety of accreting binaries with neutron stars or black holes as compact components (ESA press release)(Bird et al. 2007)
  • Inner-Galaxy monitoring finds relatively-low central black-hole (SgrA) and binary activity, which allows to constrain the population of fainter accreting binaries (Kuulkers et al. 2007; ESA press release)(18Jan2007)
  • GRB061122 detected 7 deg off axis (22Nov2006)
  • Cyg X-1 outburst at 2*I(Crab) in soft-hard state (Tuerler et al. 2006)(05Oct2006)
  • Evidence for Crab polarization-state correlations between gamma-rays (SPI) and optical (Willis et al. 2006)(01Aug2006)
  • Xray Binary spectra (LMXBs) show hard tails from blackbody emission, Comptonized by magnetospheric electrons (Paizis et al. 2006)(26Jul2006)
  • Clear (5sigma) detection of both 60Fe lines from the Galaxy with SPI (Wang et al. 2007) (Picture of Jun07)(03Jul06)
  • Detection of both 44Ti low-energy lines with IBIS (Renaud et al. 2006) (29Jun06)
  • Determination of AGN luminosity function, showing that AGN contribute only at the percent level to total background at 20-50 keV, and that obscured AGN are a minor population (Beckmann et al. 2006; see also Sazonov et al. 2006, Bassani et al. 2006, Bazzano et al. 2006, Bird et al. 2006) (28Jun06)
  • Detection of a GRB from 'the backside' of INTEGRAL with IBIS (Marcinkowski et al. 2006) (press release)(POM) (16Jun2006)
  • Identification of IBIS-detected absorbed-source AXJ1838-0655 with HESS source J1837-069, suggestive of a cosmic particle accelerator (SNR/PWN?); similarly, INTEGRAL IGR18135-1751 coincides with HESS J1813-178, also seen by MAGIC, and likely a SNR accelerating cosmic rays. Issue: electrons or hadrons? (Molkov et al. 2004; Bird et al. 2006) (10May2006)
  • Anomalous X-ray pulsars (AXPs) identified as high-magnetic field neutron stars, related to soft gamma-ray repeaters (denHartog et al. 2006, POM) (20Mar2006)
  • Earth observations clearly detect the cosmic diffuse X-ray background with SPI and IBIS (POM_Jun06)(POM_May06)(ESA Press Release Sep06)(Churazov et al. 2006)(25Jan2006)
  • Publication of 26Al Diffuse-Emission Results: Line width constraint, signature of Galactic rotation (POM)(Diehl et al. 2006)(05Jan2006)
  • Detection of new class of high-mass and rapidly-variable X-ray Binaries (POM)(Negueruela 2005)(02Nov2005)
  • Non-detection of 44Ti lines from Cas A with SPI rules out 44Ti velocities <1000 km/s (Vink 2005) (18Jul2005)
  • First AGN catalogue from INTEGRAL (Beckmann et al. 2005)(08Jul2005)
  • Second soft gamma-ray source catalogue released (Bird et al. 2005)(05Jul2005)
  • Positron annihilation from Positronium continuum confirms 511 keV line results (Weidenspointner et al. 2005) (21Jun2005)
  • Diffuse Galactic Emission analyzed for source contributions: low-energy part dominated by typical X-ray sources, high-energy part with singificant-to-dominating contribution of a new source population (Lebrun et al. 2005; Bouchet et al. 2005; Strong et al. 2005) (15Jun2005)
  • New discoveries by HESS of cosmic-ray acceleration signs in / near supernova remnants: INTEGRAL/IBIS detection of these same sources (Ubertini et al. 2005) (15Jun2005)
  • Diffuse 26Al emission from inner Galaxy: 26Al nuclei found to have low velocity as typical for ISM; detection of Doppler shift signature as expected from Galactic rotation (Diehl et al. 2005) (15Jun2005)
  • Galactic Center region sources imaging: new source near GC detected (Belanger et al. 2005)(21May2005)
  • State change and flaring activity in Cyg-X1-like BH binary JGR17464 (Joinet et al. 2005) (10Mar2005)
  • Cyg X-1 BH accretion seen in intermediate state, variability analyzed (Cadolle-Bel et al. 2005, Malzac et al. 2005) (10Mar2005)
  • Blazar 3C454 outburst detected with INTEGRAL (Pian et al. 2006) (15Feb06)
  • Cyclotron lines most clearly seen in transient X-ray pulsar X00115+63 (Santangelo et al. 2005) (21Jan2005)
  • Giant outburst of magnetar SGR1806 on 27 Dec 2004: First reported from SPI-ACS detectors (GCN 2920ff; MPE report (in german)) (21Jan2005)
  • Absence of 44Ti emission from SNR Tycho rules out sub-Ch model for this case (Renaud et al. 2005)(18Jan2005)
  • 44Ti emission from Cas A SNR is confirmed with IBIS (Vink et al. 2005) (18Jan2005)
  • Radioactive 60Fe: Now seen with SPI (Internal INTEGRAL Workshop at ESTEC; Harris et al. A&A 2005) (18Jan2005)
  • Positron annihilation measurements confirm symmetric bulge-like extended emission in inner Galaxy with a weak disk component; annihilation must occur in warm partly-ionized ISM (Jean et al. 2005; Churazov et al. 2005; Knödlseder et al. 2005) (18Jan2005)
  • Mapping of X-ray binaries in Galaxy confirms HMXB origin in star-forming regions, and LMXB origin in old stellar population (Lutovinov et al. 2004) (11Nov2004)
  • Cyclotron lines seen in Nov-Jan outburst from Be-X-ray binary V0332+53 (Kreykenbohm et al. 2005) (26Dec2004) 
  • Rapid GRB followups on INTEGRAL's GRB041219 detection allow prompt burst discovery also in IR (Hanlon et al. 2005) (Jan2005)
  • Fastest-rotating X-ray pulsar: Discovered JGR 00291+5934 as millisecond pulsar with 1.67 ms periodicity (Eckert et al. ATel 352; Falanga et al. A&A 2005) (02Dec2004)
  • 26Al emission from Cygnus region indicates young massive star cluster origin, from slightly broadened line (Knödlseder et al. 2004) (11Feb2004)
  • 44Ti emission from candidate young SNR in Vela region is not confirmed by INTEGRAL (vonKienlin et al. 2004) (11Feb2004)
  • Closest and underluminous Gamma-Ray Burst GRB031203 detected (z~0.3), associated with SN (Sazonov et al. 2004) (05Aug2004)
  • Diffuse emission in the innner Galaxy is confirmed in SPI surveys (yet not understood), in spite of an unexpectedly-large population of hard X-ray point sources discovered with ISGRI (Lebrun et al. 2004; Strong et al. 2004)(17Mar2004)
  • A gamma-ray burst occurs within INTEGRAL's field of view (GRB031203); INTEGRAL's alert and results stimulated  follow-up studies on its optical counterpart after its finding (05Dec2003)
  • 26Al emission from inner Galaxy does not confirm ~550 km/s high-velocity line reported earlier (Diehl et al. 2003) (11Nov2003) 
  • Positron annihilation emission from inner Galaxy appears as extended, bulge-like emission (Jean et al. 2003) (17Sep2003; 10Nov2003)
  • New hard-X-ray sources are discovered with INTEGRAL, which appear embedded in molecular clouds, e.g. IGR J16318-4848, opening up broader research on stellar-mass black holes  (Walter et al. 2003) (10Apr2003,17Oct2003)
  • First GRBs rapidly located with INTEGRAL/IBAS, specifically GRB021219 (Mereghetti et al. GCNs 1706 ff) (20Dec2002)

INTEGRAL Mission Notes & News

SPI Instrument Performance Notes & Newsthe SPI instrument

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