TY - JOUR
T1 - INTEGRAL upper limits on a bright X-ray flare from Sgr A
AU - Trap, Guillaume
AU - Goldwurm, Andrea
AU - Terrier, Régis
AU - Bélanger, Guillaume
AU - Yusef-Zadeh, Farhad
AU - Melia, Fulvio
PY - 2008
Y1 - 2008
N2 - Sgr A* is the supermassive black hole housed at the Galactic Center. Its non-thermal X-ray counterpart is variable and exhibits rapid flares about once per day. Besides, a soft y-ray source discovered by INTEGRAL apparently coincident with Sgr Az.ast;, IGR J17456-2901, might be related to the X-ray emission. To gain more indsight on the possible links between X-rays and y-rays, a new joint XMM-Newton/INTEGRAL campaign on the Galactic Center was performed in April 2007. Here, we report the INTEGRAL ∼100 ks long observation of this campaign. For the first time, a bright X-ray flare from Sgr A* detected by XMM-Newton (∼16.1 × 10-12 erg s-1 cm-2, 2-10 keV) fell into INTEGRAL observing time. However, no evidence for variability was found by INTEGRAL/ISGRI, neither in the 20-40 nor in the 40-100 keV band, for which we place 3σ upper limits on the flare's flux of 3.63 and 3.60 × 10 -11 erg s-1 cm-2, respectively.
AB - Sgr A* is the supermassive black hole housed at the Galactic Center. Its non-thermal X-ray counterpart is variable and exhibits rapid flares about once per day. Besides, a soft y-ray source discovered by INTEGRAL apparently coincident with Sgr Az.ast;, IGR J17456-2901, might be related to the X-ray emission. To gain more indsight on the possible links between X-rays and y-rays, a new joint XMM-Newton/INTEGRAL campaign on the Galactic Center was performed in April 2007. Here, we report the INTEGRAL ∼100 ks long observation of this campaign. For the first time, a bright X-ray flare from Sgr A* detected by XMM-Newton (∼16.1 × 10-12 erg s-1 cm-2, 2-10 keV) fell into INTEGRAL observing time. However, no evidence for variability was found by INTEGRAL/ISGRI, neither in the 20-40 nor in the 40-100 keV band, for which we place 3σ upper limits on the flare's flux of 3.63 and 3.60 × 10 -11 erg s-1 cm-2, respectively.
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M3 - Conference article
AN - SCOPUS:84883651272
SN - 1824-8039
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 7th INTEGRAL Workshop - An INTEGRAL View of Compact Objects, INTEGRAL 2008
Y2 - 8 September 2008 through 11 September 2008
ER -