A Search for Untriggered GRB Afterglows with ROTSE-III
We present the results of a search for untriggered gamma-ray burst (GRB) afterglows with the Robotic Optical Transient Search Experiment-III (ROTSE-III) telescope array. This search covers observations from 2003 September to 2005 March. We have an effective coverage of 1.74 deg super(2) yr for rapid...
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| Veröffentlicht in: | The Astrophysical journal 2005-10, Vol.631 (2), p.1032-1038 |
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| creator | Rykoff, E. S Aharonian, F Akerlof, C. W Alatalo, K Ashley, M. C. B Güver, T Horns, D Kehoe, R. L Kiziloǧlu, Ü McKay, T. A Özel, M Phillips, A Quimby, R. M Schaefer, B. E Smith, D. A Swan, H. F Vestrand, W. T Wheeler, J. C Wren, J Yost, S. A |
| description | We present the results of a search for untriggered gamma-ray burst (GRB) afterglows with the Robotic Optical Transient Search Experiment-III (ROTSE-III) telescope array. This search covers observations from 2003 September to 2005 March. We have an effective coverage of 1.74 deg super(2) yr for rapidly fading transients that remain brighter than 617.5 mag for more than 30 minutes. This search is the first large-area survey to be able to detect typical untriggered GRB afterglows. Our background rate is very low and purely astrophysical. We have found four previously unknown cataclysmic variables (CVs) and one new flare star. We have not detected any candidate afterglow events or other unidentified transients. We can place an upper limit on the rate of fading optical transients with quiescent counterparts dimmer than 620th magnitude at a rate of less than 1.9 deg super(-2) yr super(-1) with 95% confidence. This places limits on the optical characteristics of off-axis (orphan) GRB afterglows. As a by-product of this search, we have an effective 652 deg super(2) yr of coverage for very slowly decaying transients, such as CVs. This implies an overall rate of outbursts from high Galactic latitude CVs of 0.1 deg super(-2) yr super(-1). |
| doi_str_mv | 10.1086/432832 |
| format | Article |
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S ; Aharonian, F ; Akerlof, C. W ; Alatalo, K ; Ashley, M. C. B ; Güver, T ; Horns, D ; Kehoe, R. L ; Kiziloǧlu, Ü ; McKay, T. A ; Özel, M ; Phillips, A ; Quimby, R. M ; Schaefer, B. E ; Smith, D. A ; Swan, H. F ; Vestrand, W. T ; Wheeler, J. C ; Wren, J ; Yost, S. A</creator><creatorcontrib>Rykoff, E. S ; Aharonian, F ; Akerlof, C. W ; Alatalo, K ; Ashley, M. C. B ; Güver, T ; Horns, D ; Kehoe, R. L ; Kiziloǧlu, Ü ; McKay, T. A ; Özel, M ; Phillips, A ; Quimby, R. M ; Schaefer, B. E ; Smith, D. A ; Swan, H. F ; Vestrand, W. T ; Wheeler, J. C ; Wren, J ; Yost, S. A</creatorcontrib><description>We present the results of a search for untriggered gamma-ray burst (GRB) afterglows with the Robotic Optical Transient Search Experiment-III (ROTSE-III) telescope array. This search covers observations from 2003 September to 2005 March. We have an effective coverage of 1.74 deg super(2) yr for rapidly fading transients that remain brighter than 617.5 mag for more than 30 minutes. This search is the first large-area survey to be able to detect typical untriggered GRB afterglows. Our background rate is very low and purely astrophysical. We have found four previously unknown cataclysmic variables (CVs) and one new flare star. We have not detected any candidate afterglow events or other unidentified transients. We can place an upper limit on the rate of fading optical transients with quiescent counterparts dimmer than 620th magnitude at a rate of less than 1.9 deg super(-2) yr super(-1) with 95% confidence. This places limits on the optical characteristics of off-axis (orphan) GRB afterglows. As a by-product of this search, we have an effective 652 deg super(2) yr of coverage for very slowly decaying transients, such as CVs. 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A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Search for Untriggered GRB Afterglows with ROTSE-III</atitle><jtitle>The Astrophysical journal</jtitle><date>2005-10-01</date><risdate>2005</risdate><volume>631</volume><issue>2</issue><spage>1032</spage><epage>1038</epage><pages>1032-1038</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>We present the results of a search for untriggered gamma-ray burst (GRB) afterglows with the Robotic Optical Transient Search Experiment-III (ROTSE-III) telescope array. This search covers observations from 2003 September to 2005 March. We have an effective coverage of 1.74 deg super(2) yr for rapidly fading transients that remain brighter than 617.5 mag for more than 30 minutes. This search is the first large-area survey to be able to detect typical untriggered GRB afterglows. Our background rate is very low and purely astrophysical. 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| title | A Search for Untriggered GRB Afterglows with ROTSE-III |
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