Calvera (X-ray source)

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]
Rotation	59.199071070 ms
Age	285,000 years
Other designations
	PSR J1412+7922, RX J1412.9+7922, 1RXS J141256.0+792204[2]
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] There is a ring of radio emission almost a degree in diameter, offset about 4′.9 from Calvera itself, which is possibly its supernova remnant.[5]

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

References

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.
Arias, M.; Botteon, A.; Bassa, C. G.; Van Der Jagt, S.; Van Weeren, R. J.; o'Sullivan, S. P.; Bosschaart, Q.; Dullaart, R. S.; Hardcastle, M. J.; Hessels, J. W. T.; Shimwell, T.; Slob, M. M.; Sturm, J. A.; Tasse, C.; Theijssen, N. C. M. A.; Vink, J. (2022). "Possible discovery of Calvera's supernova remnant". Astronomy & Astrophysics. 667: A71. arXiv:2207.14141. Bibcode:2022A&A...667A..71A. doi:10.1051/0004-6361/202244369. S2CID 251135361.

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.

[5] Arias, M.; Botteon, A.; Bassa, C. G.; Van Der Jagt, S.; Van Weeren, R. J.; o'Sullivan, S. P.; Bosschaart, Q.; Dullaart, R. S.; Hardcastle, M. J.; Hessels, J. W. T.; Shimwell, T.; Slob, M. M.; Sturm, J. A.; Tasse, C.; Theijssen, N. C. M. A.; Vink, J. (2022). "Possible discovery of Calvera's supernova remnant". Astronomy & Astrophysics. 667: A71. arXiv:2207.14141. Bibcode:2022A&A...667A..71A. doi:10.1051/0004-6361/202244369. S2CID 251135361.