Calvera (X-ray source)
In astronomy, Calvera is a nickname—based on the villain in the 1960 film The Magnificent Seven—of an X-ray source known as 1RXS J141256.0+792204 in the ROSAT All-Sky Survey Bright Source Catalog (RASS/BSC). It lies in the constellation Ursa Minor and is identified as an isolated neutron star.[1] It is one of the closest of its kind to Earth.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 14h 12m 56.0s |
| Declination | +79° 22′ 04″ |
| Apparent magnitude (V) | ? |
| Distance | 625 ± 375 ly (190 ± 110 pc) |
| Spectral type | X |
| Other designations | |
RX J1412.9+7922 | |
The object is so-named because the seven previously known isolated neutron stars are known collectively as 'The Magnificent Seven'.
References
- "Rare dead star found near Earth". August 20, 2007. Archived from the original on July 13, 2014. Retrieved August 21, 2007.
- Rutledge, Robert; Fox, Derek; Shevchuk, Andrew (2008). "Discovery of an Isolated Compact Object at High Galactic Latitude". The Astrophysical Journal. 672 (2): 1137–43. arXiv:0705.1011. Bibcode:2008ApJ...672.1137R. doi:10.1086/522667.
External links
- SIMBAD query result: RX J1412.9+7922 -- X-ray source
- Universe Today, Closest Neutron Star Discovered
- Pennsylvania State University. "Possible closest neutron star to Earth found" (Press release). August 20, 2007. Retrieved August 21, 2007.
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