INTEGRAL/IBIS detects renewed activity from H 1417-624

M. Fiocchi*, A. Sguera, L. Sidoli, A. Bazzano, A. J. Bird, P. A. Charles, J. Chenevez, S. P. Drave, Erik Kuulkers, L. Natalucci, A. Paizis, P. Parisi, A. Tarana, P. Ubertini

*Corresponding author for this work

Research output: Other contributionNet publication - Internet publicationResearch


During a recent INTEGRAL Galactic Plane Scanning observation (PI: A. Bazzano), started on 2014 January 19 at 07:51 UTC, IBIS/ISGRI detected renewed activity from the transient system H 1417-624. The source H 1417-624 was detected at about 10 sigma in the IBIS map 18-40 keV, with a flux of 14.5+/-1.5 mCrab (uncertainties at 90% c.l.) and a net exposure time of 25ks. The 40-100 keV IBIS/ISGRI 3-sigma upper limit is about 8 mCrab. During the previous INTEGRAL revolution 1375, started on 2014 January 16 at 07:55, the 3-sigma upper limit was 5 mCrab (18-40 keV), although the exposure time was 22ks. H 1417-624 is a Be X-ray Transient (Apparao et al. 1980, A&A 89, 249; Grindlay et al. 1984, ApJ 276, 621) showing a neutron star spin period of 17.54 s and an orbital period of 42.12 days (Finger et al. 1996, A&A Supp. Ser. 120, 209). It was previously detected in 1994 and 1995 (during a strong type II outburst lasting over 110 days; Finger et al. 1996), in 1999 by BATSE (Finger 1999, IAUC# 7313 and ATels #52 and #53, for the correct spin period), in 2008 July by INTEGRAL IBIS/ISGRI (ATel #1613) and in 2009 October by Fermi/GBM (ATel #2275) and by Swift/BAT (ATel #2276). Further INTEGRAL Galactic Plane Scanning observation are planned in the coming days. Results from the Galactic Plane Scanning are made publicly available at:
Original languageEnglish
Publication date21 Jan 2014
VolumeATel #5782
Number of pages1
Publication statusPublished - 21 Jan 2014
SeriesThe Astronomer's telegram


  • X-ray
  • Binary
  • Transient

Cite this

Fiocchi, M., Sguera, A., Sidoli, L., Bazzano, A., Bird, A. J., Charles, P. A., Chenevez, J., Drave, S. P., Kuulkers, E., Natalucci, L., Paizis, A., Parisi, P., Tarana, A., & Ubertini, P. (2014, Jan 21). INTEGRAL/IBIS detects renewed activity from H 1417-624. The Astronomer's telegram