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.[3] It is one of the closest of its kind to Earth.[4]

For other uses, see Calvera (disambiguation).
Calvera
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Ursa Minor
Right ascension 14h 12m 55.867s[1]
Declination +79° 22′ 03.895″[1]
Characteristics
Evolutionary stage Neutron star
Astrometry
Distance≤2000[1] pc
Details[1]
Rotation59.199071070 ms
Age285,000 years
Other designations
PSR J1412+7922, RX J1412.9+7922, 1RXS J141256.0+792204[2]
Database references
SIMBADdata

The object is so-named because the seven previously known isolated neutron stars are known collectively as 'The Magnificent Seven'.

References
  1. Bogdanov, Slavko; et al. (28 May 2019). "Neutron Star Interior Composition Explorer X-Ray Timing of the Radio and γ-Ray Quiet Pulsars PSR J1412+7922 and PSR J1849-0001". The Astrophysical Journal. 877 (2): 69. arXiv:1902.00144. Bibcode:2019ApJ...877...69B. doi:10.3847/1538-4357/ab1b2e.
  2. "RX J1412.9+7922". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 September 2020.
  3. "Rare dead star found near Earth". August 20, 2007. Archived from the original on July 13, 2014. Retrieved August 21, 2007.
  4. 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.


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