A POSSIBLE PERIOD FOR THE K -BAND BRIGHTENING EPISODES OF GX 17+2
| Autor: | Reba M. Bandyopadhyay, Thomas E. Harrison, Stefanie Wachter, Bernard J. McNamara, Michael P. Rupen, Jillian Bornak |
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| Rok vydání: | 2009 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science K band FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics - High Energy Astrophysical Phenomena Low Mass Solar and Stellar Astrophysics (astro-ph.SR) Z source |
| Zdroj: | The Astrophysical Journal. 701:L110-L113 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1088/0004-637x/701/2/l110 |
| Popis: | The low mass X-ray binary and Z source GX 17+2 undergoes infrared K-band brightening episodes of at least 3.5 magnitudes. The source of these episodes is not known. Prior published K-band magnitudes and new K-band measurements acquired between 2006 and 2008 suggest that the episodes last at least 4 hours and have a period of 3.01254 $\pm$ 0.00002 days. Future bright episodes can be predicted using the ephemeris JD_{max} (n) = 2454550.79829 + (3.01254 $\pm$ 0.00002)(n) days. A growing body of evidence suggests that the GX 17+2 could have a synchrotron jet, which could cause this activity. Comment: 11 pages, 2 figures; to be published in ApJ Letters |
| Databáze: | OpenAIRE |
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