INTEGRAL GPS detects renewed activity from IGR J18483-0311 and GRS 1915+105

ATel #13676; V. A. Lepingwell (Univ. of Southampton, UK), J. Chenevez, J. H. Beck (DTU Space, Denmark), F. Onori, A. Bazzano, M. Fiocchi (INAF-IAPS Roma, Italy), A. J. Bird, P. Charles (Univ. of Southampton, UK), K. Alizai (DTU Space, Denmark), L. Natalucci, P. Ubertini (INAF-IAPS Roma, Italy), L. Bassani, A. Malizia, N. Masetti, V. Sguera (INAF-OAS, Bologna, Italy), A. Bodaghee (Georgia College & State University, USA), E. Kuulkers (ESA/ESTEC, The Netherlands)
on 28 Apr 2020; 11:06 UT
Credential Certification: Victoria Lepingwell (V.A.Lepingwell@soton.ac.uk)

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INTEGRAL has recently performed public observations of the Scutum Region during the Galactic Plane Scanning program (PI: A. Bazzano) in revolution 2221 (between 2020-04-25 10:47:13 and 2020-04-27 01:10:30 UTC). INTEGRAL detected a number of Galactic sources, notably IGR J18483-0311 and GRS 1915+105.

Renewed activity from the SFXT IGR J18483-0311 was detected by INTEGRAL at the following flux levels over the whole revolution:

Instrument	Flux	E range	Significance	Effective
	10-10 erg cm-2 s-1 (mCrab)	keV	sigma	exp.time (ks)
IBIS/ISGRI	1.8 ± 0.2 (16.7 ± 1.4)	22-60	11.7	10.2
JEM-X	3.5 ± 0.3 (23.0 ± 2.0)	3-10	23.0	21.5
JEM-X	3.3 ± 0.5 (31.0 ± 5.0)	10-25	23.0	21.5

Activity from microquasar GRS 1915+105 has been recently reported (ATel #13652) and was also detected by INTEGRAL as follows:

Instrument	Flux	E range	Significance	Effective
	10-10 erg cm-2 s-1 (mCrab)	keV	sigma	exp.time (ks)
IBIS/ISGRI	1.8 ± 0.2 (16.7 ± 1.5)	22-60	11.3	9.3
JEM-X	1.7 ± 0.3 (11.5 ± 2.5)	3-10	7.0	23.0
JEM-X	1.6 ± 0.7 (15.0 ± 7.0)	10-25	7.0	23.0

All the data have been analysed using the Offline Software Analysis version 11.0 (OSA11).

Further INTEGRAL Galactic Plane Scanning observations are planned in the coming days. Results from the Galactic Plane Scanning are made publicly available at: http://gps.iaps.inaf.it