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Record Details

Record 70 of 95803
Discovery of a Hand X-Ray Source, SAX J0635+0533, in the Error Box of the Gamma-Ray Source 2EG J0635+0521
Author and Affiliation:
Kaaret, P.(Columbia Univ., Columbia Astrophysics Lab., New York, NY United States)
Piraino, S.(Columbia Univ., Columbia Astrophysics Lab., New York, NY United States)
Halpern, Jules P.(Columbia Univ., Columbia Astrophysics Lab., New York, NY United States)
Eracleous, M.(Columbia Univ., Columbia Astrophysics Lab., New York, NY United States)
Oliversen, Ronald [Technical Monitor]
Abstract: We have discovered an X-ray source, SAX J0635+0533, with a hard spectrum within the error box of the GeV gamma-ray source in Monoceros, 2EG J0635+0521. The unabsorbed flux from the source is 1.2 x 10(exp -11) ergs /sq cm s in the 2-10 keV band. The X-ray spectrum is consistent with a simple power-law model with absorption. The photon index is 1.50 +/- 0.08, and we detect emission out to 40 keV. Optical observations identify a counterpart with a V magnitude of 12.8. The counterpart has broad emission lines and the colors of an early B-type star. If the identification of the X-ray/optical source with the gamma-ray source is correct, then the source would be a gamma-ray-emitting X-ray binary.
Publication Date: May 01, 2001
Document ID:
20010055645
(Acquired Jun 29, 2001)
Subject Category: SPACE RADIATION
Document Type: Journal Article
Publication Information: The New X-Ray/Gamma-Ray Pulsars; p. 11; CAL-3332
Contract/Grant/Task Num: NAG5-3229
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: Columbia Univ.; Columbia Astrophysics Lab.; New York, NY United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: X RAY SOURCES; GAMMA RAYS; EMISSION SPECTRA; B STARS; VISUAL OBSERVATION; COLOR; EARLY STARS; ERRORS; NEUTRONS; PHOTONS; X RAY BINARIES
Imprint And Other Notes: Repr. from The Astrophysical Journal, v. 523, 1999 p 197
Availability Source: Other Sources
Availability Notes: Abstract Only
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