1E 1207.4-5209

1E 1207.4-5209

Artist's impression of 1E 1207.4-5209
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Centaurus[1]
Right ascension 12h 10m 0.88s[2]
Declination −52° 26′ 28.4″[2]
Details
Rotation0.424130748815 s
Age302 Myr
Other designations
Blue Eye Pulsar, 1E 1207.4-5209, PSR J1210-5226, 2XMM J121000.8-522628, 1RXS J121000.9-522629, EXO 120723-5209.8 [3]
Database references
SIMBADdata

1E 1207.4-5209 (nicknamed as Blue Eye Pulsar) is a pulsar and a central compact object (CCO) located in the supernova remnant PKS 1209−51/52.[4][5][6] It is about 7,000 light-years away, in the southern constellation of Centaurus.[7]

It was first identified as an X-ray source, but was later found to be a pulsar with a rotation period of 0.4241 seconds[4] and an estimated age of 302 million years. In 2026, astronomers picked up radio pulses from the object for the first time, decades after it was first found. This leads to new interest about its unusual properties.[6]

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. 1 2 Lin, Dacheng; Webb, Natalie A.; Barret, Didier (2012-09-01). "CLASSIFICATION OF X-RAY SOURCES IN THE XMM-NEWTON SERENDIPITOUS SOURCE CATALOG". The Astrophysical Journal. 756 (1): 27. arXiv:1207.1913. doi:10.1088/0004-637X/756/1/27. ISSN 0004-637X.
  3. ↑ "PSR J1210-5226". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-07-11.
  4. 1 2 Zavlin, V. E.; Pavlov, G. G.; Sanwal, D.; Trümper, J. (2000). "Discovery of 424 Millisecond Pulsations from the Radio-quiet Neutron Star in the Supernova Remnant PKS 1209−51/52". The Astrophysical Journal. 540 (1): L25–L28. arXiv:astro-ph/0005548. Bibcode:2000ApJ...540L..25Z. doi:10.1086/312866.
  5. ↑ Sanwal, D.; Pavlov, G. G.; Zavlin, V. E.; Teter, M. A. (2002). "Discovery of Absorption Features in the X-Ray Spectrum of an Isolated Neutron Star". The Astrophysical Journal. 574 (1): L61–L64. arXiv:astro-ph/0206195. Bibcode:2002ApJ...574L..61S. doi:10.1086/342368.
  6. 1 2 "Astronomers discover radio signals coming from rare 'Blue Eye Pulsar' after decades of silence". Space.com. Retrieved 2026-07-09.
  7. ↑ "Photo Album: 1E 1207.4-5209: X-rays Probe Gravitational Field Of A Neutron Star". Chandra X-ray Observatory. Retrieved 2026-07-11.
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