| NRAO 530 | |
|---|---|
 The flat spectrum radio quasar NRAO 530. | |
| Observation data (J2000.0 epoch) | |
| Constellation | Serpens |
| Right ascension | 17h 33m 02.705s |
| Declination | −13° 04′ 49.548″ |
| Redshift | 0.899000 |
| Heliocentric radial velocity | 269,513 km/s |
| Distance | 7.558 Gly |
| Apparent magnitude (V) | 19.5 |
| Apparent magnitude (B) | 18.0 |
| Characteristics | |
| Type | blazar;FRSQ;LPQBLLAC |
| Other designations | |
| LEDA 2829294, PKS 1730-130, 4FGL J1733.0-1305, G4Jy 1417, Cul 1730-130, PKS 1730-13, PKS B1730-130 | |
NRAO 530 or PKS 1730-13 is a flat-spectrum radio quasar[1] located in the southern constellation of Serpens. It has a redshift of 0.902.[2][3] and was first discovered by two astronomers, W.J. Welch and Hyron Spinrad in 1973.[4] It is classified as a blazar because of its optical variability across the electromagnetic spectrum in radio, gamma ray and X-ray bands.[5] This quasar is also further categorized an OVV quasar.[6][7]
- ^ Jorstad, Svetlana; Wielgus, Maciek; Lico, Rocco; Issaoun, Sara; Broderick, Avery E.; Pesce, Dominic W.; Liu, Jun; Zhao, Guang-Yao; Krichbaum, Thomas P.; Blackburn, Lindy; Chan, Chi-kwan; Janssen, Michael; Ramakrishnan, Venkatessh; Akiyama, Kazunori; Alberdi, Antxon (February 2023). "The Event Horizon Telescope Image of the Quasar NRAO 530". The Astrophysical Journal. 943 (2): 170. arXiv:2302.04622. Bibcode:2023ApJ...943..170J. doi:10.3847/1538-4357/acaea8. ISSN 0004-637X.
- ^ Junkkarinen, V. (1984-07-01). "Spectrophotometry of the QSO NRAO 530". Publications of the Astronomical Society of the Pacific. 96: 539–542. Bibcode:1984PASP...96..539J. doi:10.1086/131374. ISSN 0004-6280.
- ^ Torniainen, I.; Tornikoski, M.; Teräsranta, H.; Aller, M. F.; Aller, H. D. (2005-05-13). "Long term variability of gigahertz-peaked spectrum sources and candidates" (PDF). Astronomy & Astrophysics. 435 (3): 839–856. Bibcode:2005A&A...435..839T. doi:10.1051/0004-6361:20041886. ISSN 0004-6361.
- ^ Welch, W. J.; Spinrad, Hyron (1973-08-01). "High-Frequency Observations of the Radio Source NRAO 530". Publications of the Astronomical Society of the Pacific. 85 (506): 456. Bibcode:1973PASP...85..456W. doi:10.1086/129485. ISSN 0004-6280.
- ^ An, Tao; Baan, Willem A.; Wang, Jun-Yi; Wang, Yu; Hong, Xiao-Yu (2013-08-08). "Periodic radio variabilities in NRAO 530: a jet–disc connection?". Monthly Notices of the Royal Astronomical Society. 434 (4): 3487–3496. doi:10.1093/mnras/stt1265. ISSN 0035-8711.
- ^ Feng, S.-W.; Shen, Z.-Q.; Cai, H.-B.; Chen, X.; Lu, R.-S.; Huang, L. (2006-08-23). "Multi-frequency VLBI observations of NRAO 530" (PDF). Astronomy & Astrophysics. 456 (1): 97–104. arXiv:astro-ph/0605578. Bibcode:2006A&A...456...97F. doi:10.1051/0004-6361:20054678. ISSN 0004-6361.
- ^ Starr, Michelle (2023-02-13). "EHT Peers Into The Heart of One of The Brightest Lights in The Universe". ScienceAlert. Retrieved 2024-10-26.