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RE J1255+266: Detection of an extremely bright EUV transientDuring a pointed ROSAT observation in the direction of the Coma cluster of galaxies an exceptionally bright EUV source, RE J1255+266, was detected serendipitously. The source is located close to the Galactic North Pole, at b(sub II) is approximately or equal to 89 deg. Its observed EUV flux (62 - 110 eV) at the time of the detection was of order 7 x 10(exp -9) ergs/sq cm, making RE J1255+266 temporarily one of the brightest EUV sources on the sky. The EUV flare of RE J1255+266 has a light curve with a decay time of about 0.86 days. With respect to earlier non-detections, the source brightened by a factor of approximately 7000. Such a behavior has not been observed before. Thus, it is unclear what type of source RE J1255+266 might be. Up to now no positive identification with any known source could be obtained. Emission at the position of the source was previously only detected in the 1987 Green Bank radio continuum survey. Simultaneous observations with Compton Gamma Ray Observatory/Burst and Transient Source Experiment (CGRO/BATSE) resulted in non-detections of the source in the 8 - 50 keV energy range.
Document ID
19950061761
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dahlem, M.
(Space Telescope Science Inst. Baltimore, MD, United States)
Kreysing, H.-C.
(Tuebingen Universitaet Tuebingen, Germany)
White, S. M.
(Maryland Univ. College Park, MD, United States)
Engels, D.
(Hamberger Sternwarte Hamburg, Germany)
Condon, J. J.
(National Radio Astronomy Observatory, Charlottesville, VA United States)
Harmon, B. A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Zhang, S. N.
(Universities Space Research Association, Huntsville, AL United States)
Kouveliotou, C.
(Universities Space Research Association, Huntsville, AL United States)
Paciesas, W. S.
(Alabama Univ. Huntsville, AL, United States)
Voges, W.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Date Acquired
August 16, 2013
Publication Date
March 1, 1995
Publication Information
Publication: Astronomy and Astrophysics
Volume: 295
Issue: 1
ISSN: 0004-6361
Subject Category
Astronomy
Accession Number
95A93360
Funding Number(s)
CONTRACT_GRANT: NSF AST-92-17891
Distribution Limits
Public
Copyright
Other

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