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Deeper INTEGRAL upper limits on the gamma-ray transient AGL J1608-5253

ATel #6462; V. Sguera (INAF-IASF Bologna, Italy), M. Fiocchi (INAF-IAPS Roma, Italy), A. Bazzano (INAF-IAPS Roma, Italy), A. J. Bird (Univ. of Southampton, UK), L. Sidoli (INAF-IASF Milano, Italy)
on 12 Sep 2014; 10:42 UT
Credential Certification: Eleonora Torresi (torresi@iasfbo.inaf.it)

Subjects: X-ray, Gamma Ray, Transient

INTEGRAL performed further and longer observations (PI: Fiocchi M.) in the direction of the recently newly discovered gamma-ray transient AGL J1608-5253 (ATel #6427), in addition to those already reported in ATel #6428.

From Aug 24 11:38 (UTC) to Aug 27 07:36 (UTC), AGL J1608-5253 was in the field of view of both IBIS/ISGRI and JEM-X instruments onboard INTEGRAL for a total on-source time of 201 ks and 20 ks, respectively. In particular, the new IBIS/ISGRI observations ensured a simultaneous temporal coverage of a significant fraction of the entire gamma-ray activity detected by AGILE from AGL J1608-5253 (ATel #6427).
No source was significantly detected by INTEGRAL inside the AGILE error circle, we obtained 3-sigma upper limits of 1.4 mCrab (1.1 x 10-11 erg cm-2 s-1), 1.7 mCrab (1.6 x 10-11 erg cm-2 s-1) and 2.1 mCrab (3.1 x 10-11 erg cm-2 s-1) in the energy bands 20-40, 40-100 and 3-10 keV, respectively.