Searching for Short GRBs in Soft Gamma Rays with INTEGRAL/PICsIT

James Rodi, Angela Bazzano, Pietro Ubertini, Lorenzo Natalucci, V. Savchenko, E. Kuulkers, Carlo Ferrigno, Enrico Bozzo, Søren Brandt, Jérôme Chenevez, T. J.-L. Courvoisier, R. Diehl, A. Domingo, L. Hanlon, E. Jourdain, A. von Kienlin, P. Laurent, F. Lebrun, A. Lutovinov, A. Martin-CarrilloS. Mereghetti, J.-P. Roques, R. Sunyaev

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Abstract

With gravitational wave (GW) detections by the LIGO/Virgo collaboration over the past several years, there is heightened interest in gamma-ray bursts (GRBs), especially “short” GRBs (T <2s). The high-energy PICsIT detector (~0.2 ─ 10 MeV) on-board the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) is able to observe sources out to approximately 70° off-axis, making it essentially a soft gamma-ray, all-sky monitor for impulsiveevents, such as SGRBs. Because SGRBs typically have hard spectra with peak energies of a few hundred keV, PICsIT with its ~ 3000 cm collecting area is able to provide spectral information about these sources at soft gamma-ray energies.We have begun a study of PICsIT data for faint SGRB ssimilar to the one associated with the binary neutron star (BNS) merger GW170817, and also are preparing for future GW triggers by developing a realtime burst analysis for PICsIT. Searching the PICsIT data for significant excesses during ~30 min-long pointings containing times of SGRBs, we have been able to differentiate between SGRBs and spurious events. Also, this work allows us to assess what fraction of reported SGRBs have been detected by PICsIT, which can be used to provide an estimate of the number of GW BNS events seen by PICsIT during the next LIGO/Virgo observing runstarting in Fall 2018.
Original languageEnglish
Publication date2018
Number of pages2
Publication statusPublished - 2018
Event231st AAS Meeting - The Gaylord National Resort & Convention Center , National Harbor, United States
Duration: 8 Jan 201812 Jan 2018

Conference

Conference231st AAS Meeting
LocationThe Gaylord National Resort & Convention Center
CountryUnited States
CityNational Harbor
Period08/01/201812/01/2018

Cite this

Rodi, J., Bazzano, A., Ubertini, P., Natalucci, L., Savchenko, V., Kuulkers, E., Ferrigno, C., Bozzo, E., Brandt, S., Chenevez, J., Courvoisier, T. J-L., Diehl, R., Domingo, A., Hanlon, L., Jourdain, E., von Kienlin, A., Laurent, P., Lebrun, F., Lutovinov, A., ... Sunyaev, R. (2018). Searching for Short GRBs in Soft Gamma Rays with INTEGRAL/PICsIT. Abstract from 231st AAS Meeting, National Harbor, United States.