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

Jérôme Chenevez, M. Fiocchi, A. Bazzano, A. Tarana, L. Sidoli, A. Sguera, A. J. Bird, S. Drave, E. Kuulkers

Research output: Contribution to journalJournal articleResearch


The INTEGRAL satellite has resumed Galactic Plane Scanning observations (PI: A. Bazzano) since November 27^th , 2011. Results are made publicly available at: 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.
Original languageEnglish
JournalThe Astronomer's telegram
Pages (from-to)ATel #3816
Publication statusPublished - 2011

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