JEM-X observations of the Be/X-ray binary EXO 2030+375

S.M. Nunez, P. Reig, P. Blay, P. Kretschmar, Niels Lund, V. Reglero

Research output: Contribution to journalJournal articleResearchpeer-review


We have used data from the Joint European Monitor (JEM-X) to perform an X-ray spectral and timing analysis of the 42-s transient pulsar EXO 2030+375 during an X-ray outburst. X-ray pulsations are clearly detected with an average pulse period of 41.66+/-0.05 s and an average pulse fraction of 60%. The profile of the energy spectrum did not change appreciably throughout the X-ray outburst, although the source shows a slightly softer spectrum during periastron passage in the energy range 9-25 keV. The 5-25 keV X-ray luminosity changed by a factor of 2 throughout the observations, reaching a maximum value of 3x10(36) erg s(-1). These observations allowed us to verify the in-flight instrumental properties of the JEM-X Monitor.
Original languageEnglish
JournalAstronomy & Astrophysics
Issue number1
Pages (from-to)L411-L414
Publication statusPublished - 2003


  • EXO 2030+375
  • BeX stars
  • HMXRBs
  • JEM-X


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