Calvera (X-ray source)

Calvera
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Ursa Minor
Right ascension	14h 12m 55.867s
Declination	+79° 22′ 03.895″
Characteristics
Evolutionary stage	Neutron star
Astrometry
Distance	≤2000 pc
Details
Rotation	59.199071070 ms
Age	285,000 years
Other designations
	PSR J1412+7922, RX J1412.9+7922, 1RXS J141256.0+792204
Database references
SIMBAD	data

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]

The object is so-named because the seven previously known isolated neutron stars are known^{[by whom?]} collectively as 'The Magnificent Seven'.^{[citation needed]}

References[]

^ ^a ^b ^c ^d 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. S2CID 119337118.
^ "RX J1412.9+7922". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 September 2020.
^ "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. S2CID 7915388.

External links[]

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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[Bogdanov2019-1] 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. S2CID 119337118.

[SIMBAD-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. S2CID 7915388.

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