SIGMA observations of X-ray Nova Velorum 1993 (GRS 1009-45)
We report on hard X-ray observations of X-ray Nova Velorum 1993 (GRS 1009-45) performed with the SIGMA coded mask X-ray telescope in January 1994. The source was clearly detected with a flux of about 60 mCrab in the 40-150 keV energy band during the two observations with a hard spectrum (alpha ~ - 1...
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| creator | Goldoni, P Vargas, M Goldwurm, A Laurent, P Roques, J. -P Jourdain, E Malzac, J Vedrenne, G Revnivtsev, M Churazov, E Gilfanov, M Sunyaev, R Dyachkov, A Khavenson, N Tserenin, I Kuleshova, N |
| description | We report on hard X-ray observations of X-ray Nova Velorum 1993 (GRS 1009-45)
performed with the SIGMA coded mask X-ray telescope in January 1994. The source
was clearly detected with a flux of about 60 mCrab in the 40-150 keV energy
band during the two observations with a hard spectrum (alpha ~ - 1.9) extending
up to ~ 150 keV. These observations confirm the duration of the activity of the
source in hard X-rays over 100 days after the first maximum and suggest a
spectral hardening which has already been observed in Nova Muscae. These and
other characteristics found in these observations strengthen the case for this
Nova to be a black hole candidate similar to Nova Muscae. |
| doi_str_mv | 10.48550/arxiv.astro-ph/9709089 |
| format | Article |
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performed with the SIGMA coded mask X-ray telescope in January 1994. The source
was clearly detected with a flux of about 60 mCrab in the 40-150 keV energy
band during the two observations with a hard spectrum (alpha ~ - 1.9) extending
up to ~ 150 keV. These observations confirm the duration of the activity of the
source in hard X-rays over 100 days after the first maximum and suggest a
spectral hardening which has already been observed in Nova Muscae. These and
other characteristics found in these observations strengthen the case for this
Nova to be a black hole candidate similar to Nova Muscae.</description><identifier>DOI: 10.48550/arxiv.astro-ph/9709089</identifier><language>eng</language><subject>Physics - Astrophysics of Galaxies ; Physics - Cosmology and Nongalactic Astrophysics ; Physics - Earth and Planetary Astrophysics ; Physics - High Energy Astrophysical Phenomena ; Physics - Instrumentation and Methods for Astrophysics ; Physics - Solar and Stellar Astrophysics</subject><creationdate>1997-09</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,885</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/astro-ph/9709089$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.astro-ph/9709089$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Goldoni, P</creatorcontrib><creatorcontrib>Vargas, M</creatorcontrib><creatorcontrib>Goldwurm, A</creatorcontrib><creatorcontrib>Laurent, P</creatorcontrib><creatorcontrib>Roques, J. -P</creatorcontrib><creatorcontrib>Jourdain, E</creatorcontrib><creatorcontrib>Malzac, J</creatorcontrib><creatorcontrib>Vedrenne, G</creatorcontrib><creatorcontrib>Revnivtsev, M</creatorcontrib><creatorcontrib>Churazov, E</creatorcontrib><creatorcontrib>Gilfanov, M</creatorcontrib><creatorcontrib>Sunyaev, R</creatorcontrib><creatorcontrib>Dyachkov, A</creatorcontrib><creatorcontrib>Khavenson, N</creatorcontrib><creatorcontrib>Tserenin, I</creatorcontrib><creatorcontrib>Kuleshova, N</creatorcontrib><title>SIGMA observations of X-ray Nova Velorum 1993 (GRS 1009-45)</title><description>We report on hard X-ray observations of X-ray Nova Velorum 1993 (GRS 1009-45)
performed with the SIGMA coded mask X-ray telescope in January 1994. The source
was clearly detected with a flux of about 60 mCrab in the 40-150 keV energy
band during the two observations with a hard spectrum (alpha ~ - 1.9) extending
up to ~ 150 keV. These observations confirm the duration of the activity of the
source in hard X-rays over 100 days after the first maximum and suggest a
spectral hardening which has already been observed in Nova Muscae. These and
other characteristics found in these observations strengthen the case for this
Nova to be a black hole candidate similar to Nova Muscae.</description><subject>Physics - Astrophysics of Galaxies</subject><subject>Physics - Cosmology and Nongalactic Astrophysics</subject><subject>Physics - Earth and Planetary Astrophysics</subject><subject>Physics - High Energy Astrophysical Phenomena</subject><subject>Physics - Instrumentation and Methods for Astrophysics</subject><subject>Physics - Solar and Stellar Astrophysics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotz01LAkEcgPG5eAjtMzSXIA-j87ozfzyJ1CZYQUp0W-YVF7RZZm3Jbx-op-f2wA-hB0Zn0ihF57b8tcPM9qeSSbefg6ZADdyhxXZdvy1xdn0sgz21-afHOeFvUuwZv-fB4q94yOX3iBmAwE_15xYzSoFINZ2gUbKHPt7fOka7l-fd6pVsPur1arkhVgMQl4IMldcmSR1UisrJ6CFwJyjzLIBIhiZvvPCqio7HWHFOK624jUkHYcQYPV63F0PTlfZoy7m5WJpu39ws4h-YRUTh</recordid><startdate>19970910</startdate><enddate>19970910</enddate><creator>Goldoni, P</creator><creator>Vargas, M</creator><creator>Goldwurm, A</creator><creator>Laurent, P</creator><creator>Roques, J. -P</creator><creator>Jourdain, E</creator><creator>Malzac, J</creator><creator>Vedrenne, G</creator><creator>Revnivtsev, M</creator><creator>Churazov, E</creator><creator>Gilfanov, M</creator><creator>Sunyaev, R</creator><creator>Dyachkov, A</creator><creator>Khavenson, N</creator><creator>Tserenin, I</creator><creator>Kuleshova, N</creator><scope>GOX</scope></search><sort><creationdate>19970910</creationdate><title>SIGMA observations of X-ray Nova Velorum 1993 (GRS 1009-45)</title><author>Goldoni, P ; Vargas, M ; Goldwurm, A ; Laurent, P ; Roques, J. -P ; Jourdain, E ; Malzac, J ; Vedrenne, G ; Revnivtsev, M ; Churazov, E ; Gilfanov, M ; Sunyaev, R ; Dyachkov, A ; Khavenson, N ; Tserenin, I ; Kuleshova, N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a799-bfd4d6c78f47d5fe5b4ec9d2b301c1d93f80fc8c3c56eb2ee62206752aef7d383</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Physics - Astrophysics of Galaxies</topic><topic>Physics - Cosmology and Nongalactic Astrophysics</topic><topic>Physics - Earth and Planetary Astrophysics</topic><topic>Physics - High Energy Astrophysical Phenomena</topic><topic>Physics - Instrumentation and Methods for Astrophysics</topic><topic>Physics - Solar and Stellar Astrophysics</topic><toplevel>online_resources</toplevel><creatorcontrib>Goldoni, P</creatorcontrib><creatorcontrib>Vargas, M</creatorcontrib><creatorcontrib>Goldwurm, A</creatorcontrib><creatorcontrib>Laurent, P</creatorcontrib><creatorcontrib>Roques, J. -P</creatorcontrib><creatorcontrib>Jourdain, E</creatorcontrib><creatorcontrib>Malzac, J</creatorcontrib><creatorcontrib>Vedrenne, G</creatorcontrib><creatorcontrib>Revnivtsev, M</creatorcontrib><creatorcontrib>Churazov, E</creatorcontrib><creatorcontrib>Gilfanov, M</creatorcontrib><creatorcontrib>Sunyaev, R</creatorcontrib><creatorcontrib>Dyachkov, A</creatorcontrib><creatorcontrib>Khavenson, N</creatorcontrib><creatorcontrib>Tserenin, I</creatorcontrib><creatorcontrib>Kuleshova, N</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Goldoni, P</au><au>Vargas, M</au><au>Goldwurm, A</au><au>Laurent, P</au><au>Roques, J. -P</au><au>Jourdain, E</au><au>Malzac, J</au><au>Vedrenne, G</au><au>Revnivtsev, M</au><au>Churazov, E</au><au>Gilfanov, M</au><au>Sunyaev, R</au><au>Dyachkov, A</au><au>Khavenson, N</au><au>Tserenin, I</au><au>Kuleshova, N</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SIGMA observations of X-ray Nova Velorum 1993 (GRS 1009-45)</atitle><date>1997-09-10</date><risdate>1997</risdate><abstract>We report on hard X-ray observations of X-ray Nova Velorum 1993 (GRS 1009-45)
performed with the SIGMA coded mask X-ray telescope in January 1994. The source
was clearly detected with a flux of about 60 mCrab in the 40-150 keV energy
band during the two observations with a hard spectrum (alpha ~ - 1.9) extending
up to ~ 150 keV. These observations confirm the duration of the activity of the
source in hard X-rays over 100 days after the first maximum and suggest a
spectral hardening which has already been observed in Nova Muscae. These and
other characteristics found in these observations strengthen the case for this
Nova to be a black hole candidate similar to Nova Muscae.</abstract><doi>10.48550/arxiv.astro-ph/9709089</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics |
| title | SIGMA observations of X-ray Nova Velorum 1993 (GRS 1009-45) |
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