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INTEGRAL/JEM-X detection of 1RXS J194211.9+255552

ATel #3816; J. Chenevez (DTU Space, Denmark), M. Fiocchi, A. Bazzano, A. Tarana (INAF-IASF, Roma, Italy), L. Sidoli (INAF-IASF, Milano, Italy), Sguera (INAF-IASF; Bologna, Italy), A. J. Bird, S. Drave (Soton, United Kingdom), E. Kuulkers (ESA/ESAC, Spain)
on 21 Dec 2011; 10:52 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Jerome CHENEVEZ (jerome@space.dtu.dk)

Subjects: X-ray, Transient

Referred to by ATel #: 3818, 4209

The INTEGRAL satellite has resumed Galactic Plane Scanning observations (PI: A. Bazzano) since November 27^th , 2011. Results are made publicly available at: http://gpsiasf.iasf-roma.inaf.it/ The transient ROSAT source 1RXS J194211.9+255552 is detected by INTEGRAL/JEM-X during the Galactic Plane Scan observations performed between 2011 December 18, 13:47 (UTC) and December 19, 8:59 (UTC). The source was inside the field of view of the JEM-X detector during two pointings between UTC 15 and 15:42 on December 18, and between UTC 7:28 and 8:12 on December 19, for an amount of 5.3 ks effective exposure leading to a detection significance of eight sigmas. The averaged fluxes extracted from the combined JEM-X1 and JEM-X2 mosaics are 10 +/-2 mCrab and 16 +/-5 mCrab, between 3-10 keV and 10-25 keV, respectively. The source is not detected by the IBIS/ISGRI instrument, and we derive a 3-sigma flux upper limit of six mCrab in the 18-40 keV energy range. A Swift ToO follow-up has been approved and the data analysis will soon be performed.

INTEGRAL Galactic Palne Scanning