Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.1956....1b&link_type=abstract
The Astronomer's Telegram, #1956
Astronomy and Astrophysics
Astronomy
2
X-Ray, Binaries, Neutron Stars, Pulsars, Transients
Scientific paper
Observations with the NaI detectors of the Gamma-ray Burst Monitor (GBM) on Fermi show 66 s pulsations in the 12-25 keV band consistent with the transient Be/X-ray binary pulsar Cepheus X-4 (GS 2138+56). The source was first detected on 2009 March 7 and was again detected on March 8. On both days the pulse frequency was consistent with 15.07552(15) mHz, and the r.m.s. pulsed flux was consistent with 2.8(2)E-10 erg/cm^2/s (12-25 keV).
Beklen Elif
Finger Mark H.
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