7C 1415+2556
| 7C 1415+2556 | |
|---|---|
 7C 1415+2556, as seen by DESI Legacy Surveys | |
| Observation data (J2000.0 epoch) | |
| Constellation | Boötes |
| Right ascension | 14h 17m 56.67s |
| Declination | +25d 43m 26.22s |
| Redshift | 0.240000 |
| Heliocentric radial velocity | 71,950 km/s |
| Distance | 3.249 Gly (996.1 Mpc) |
| Apparent magnitude (V) | 0.052 |
| Apparent magnitude (B) | 0.069 |
| Surface brightness | 16.0 |
| Characteristics | |
| Type | Opt.var. BLLAC |
| Notable features | BL Lacertae object |
| Other designations | |
| RX J1417.9+2543, PGC 1747267, 2E 1415+2557, RBS 1366, 2MASS J14175667+2543260, MG2 J141757+2543, 2FGL J1418.1+2539, EXO 1415.6+2557, SWIFT J1417.7+2539 | |
7C 1415+2556 also known as 2E 1415+2557 and PGC 1747267, is a BL Lac object with an X-ray flux of >=4×10-13 ergs s-1 cm-2,[1] located in the constellation of Boötes. With a redshift of 0.24, the galaxy is located 3.2 billion light-years from Earth.[2] It was discovered in 1988 as part of a program of optical polarimetry of a complete sample of radio sources.[3]
References[edit]
- ^ Caccianiga, A.; Maccacaro, T.; Wolter, A.; Della Ceca, R.; Gioia, I. M. (2002-02-01). "On the Cosmological Evolution of BL Lacertae Objects". The Astrophysical Journal. 566 (1): 181–186. arXiv:astro-ph/0110334. Bibcode:2002ApJ...566..181C. doi:10.1086/338073. ISSN 0004-637X.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-06-16.
- ^ Impey, C. D.; Tapia, S. (1988-10-01). "New Blazars Discovered by Polarimetry". The Astrophysical Journal. 333: 666. Bibcode:1988ApJ...333..666I. doi:10.1086/166775. ISSN 0004-637X.
