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Record 1 of 1852
RE J1255+266: Detection of an extremely bright EUV transient
Author and Affiliation:
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)
Abstract: During 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.
Publication Date: Mar 01, 1995
Document ID:
19950061761
(Acquired Dec 28, 1995)
Accession Number: 95A93360
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: Astronomy and Astrophysics (ISSN 0004-6361); 295; 1; p. L13-L16
Publisher Information: Germany
Contract/Grant/Task Num: NSF AST-92-17891
Financial Sponsor: NASA; United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BRIGHTNESS DISTRIBUTION; EXTREME ULTRAVIOLET RADIATION; GALACTIC CLUSTERS; GAMMA RAY BURSTS; ROSAT MISSION; X RAY ASTRONOMY; DECAY RATES; ENERGY SPECTRA; LIGHT CURVE; PROPORTIONAL COUNTERS; SKY SURVEYS (ASTRONOMY); VARIABLE STARS
Imprint And Other Notes: Astronomy and Astrophysics vol. 295, no. 1 p. L13-L16 March 1, 1995
Miscellaneous Notes: Research sponsored by JPL
Availability Source: Other Sources
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