INTEGRAL IBIS/ISGRI energy calibration in OSA 10

Caballero, Isabel; Heras, J. A. Zurita; Mattana, F.; Soldi, S.; Laurent, Philippe; Lebrun, F.; Natalucci, Lorenzo; Fiocchi, M.; Ferrigno, C.; Rohlfs, R.

doi:10.22323/1.176.0142

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…In former versions of the Off-line Science Analysis (OSA) software, the time evolution of detectors' gain and offset (split in two energy regions) was modelled using a phenomenological description (Caballero et al, 2012). The bi-parametric spectra were corrected to make the positions of the background lines at 60 keV and 511 keV compatible with those at the beginning of the mission.…”

Section: Ibis Main Instrumentmentioning

confidence: 99%

INTEGRAL reloaded: spacecraft, instruments and ground system

Kuulkers¹,

Ferrigno²,

Kretschmar³

et al. 2021

Preprint

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The European Space Agency's INTErnational Gamma-Ray Astrophysics Laboratory (ESA/INTEGRAL) was launched aboard a Proton-DM2 rocket on 17 October 2002 at 06:41 CEST, from Baikonur in Kazakhstan. Since then, INTEGRAL has been providing long, uninterrupted observations (up to about 47 hr, or 170 ksec, per satellite orbit of 2.7 days) with a large field-of-view (FOV, fully coded: 100 deg 2 ), millisecond time resolution, keV energy resolution, polarization measurements, as well as additional wavelength coverage at optical wavelengths. This is realized by two main instruments in the 15 keV to 10 MeV energy range, the spectrometer SPI (spectral resolution 3 keV at 1.8 MeV) and the imager IBIS (angular resolution: 12 arcmin FWHM), complemented by X ray (JEM-X; 3-35 keV) and optical (OMC; Johnson V-band) monitor instruments. All instruments are co-aligned to simultaneously observe the target region. A particle radiation monitor (IREM) measures charged particle fluxes near the spacecraft. The Anticoincidence subsystems of the main instruments, built to reduce the background, are also very efficient all-sky γ-ray detectors, which provide virtually omni-directional monitoring above ∼75 keV. Besides the long, scheduled observations, INTEGRAL can rapidly (within a couple of hours) re-point and conduct Target of Opportunity (ToO) observations on a large variety of sources.INTEGRAL observations and their scientific results have been building an impressive legacy: The discovery of currently more than 600 new high-energy sources; the first-ever direct detection of 56 Ni and 56 Co radio-active decay lines from a Type Ia supernova; spectroscopy of isotopes from galactic nucleo-synthesis sources; new insights on enigmatic positron annihilation in the Galactic bulge and disk; and pioneering gamma-ray polarization studies. INTEGRAL is also a successful actor in the new multi-messenger astronomy introduced by non-electromagnetic signals from gravitational waves and from neutrinos: INTEGRAL found the first prompt electromagnetic radiation in coincidence with a binary neutron star merger. Up to now more than 1750 scientific papers based on INTEGRAL data have been published in refereed journals. In this paper, we will give a comprehensive update of the satellite status after more than 18 years of operations in a harsh space environment, and an account of the successful Ground Segment.

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Section: Ibis Main Instrumentmentioning

confidence: 99%

INTEGRAL reloaded: spacecraft, instruments and ground system

Kuulkers¹,

Ferrigno²,

Kretschmar³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In OSA10 time evolution of effective detector gain and offset (split in two regions in energy) was modelled with a phenomenological law [14]. The biparametric spectra were corrected to make the positions of the background lines at ∼60 keV and 511 keV compatible with those at the beginning at the mission.…”

Section: Update In the Energy Calibrationmentioning

confidence: 99%

“…Below 100 keV the prediction of the current model is systematically above the observed spectrum. The effect can be explained by the limitation of the approach used so far for modelling the [14], other instruments from [4], [5]. response just below the peak of the effective area and above the absorption edges.…”

Section: Crabmentioning

confidence: 99%