Outburst of  Sax J2103.5+4545 detected by Fermi/GBM
P. Jenke (UAH), M. H. Finger (USRA), C. A. WIlson-Hodge (NASA/MSFC)
Pulsations from the transient Be/X-ray pulsar Sax J2103.5+4545 are currently being detected with Fermi/GBM. The pulsations were first detected in the data of April 3-4 at a frequency of 2.8607(7) mHz. The ephemeris used to determine the frequency is from Camero-Arranz et al. 2007, A&A, 473, 55.

The Swift/BAT transient monitor is showing an increase in flux starting on April 1 reaching 92 +/- 9 mCrab (15-50 keV) on April 4. The last comparable outburst occurred in December 2014.
x-ray,binary,pulsar,transient