3C 66A

Galaxy in constellation Andromeda

3C 66A
Hubble Legacy Archive WFPC2 image of 3C 66A (brightest object on the far right)
Observation data (Epoch J2000)
Constellation	Andromeda
Right ascension	02^h 22^m 39.612^s^[1]
Declination	+43° 02′ 07.80″^[1]
Redshift	0.444^[1]^[2]
Distance	4.5 billion light-years (Light travel time)^[2] 5.4 billion light-years (present)^[2]
Type	BLLAC^[2]
Apparent magnitude (V)	15.5^[1]^[2]
Other designations
2E 558, 2EG J0220+4228, B3 0219+428A, QSO B0219+4248^[1]
See also: Quasar, List of quasars

3C 66A is a blazar^[1]^[2] located in the constellation Andromeda.

The "distance" of a far away galaxy depends on the distance measurement used. With a redshift of 0.444,^[1]^[2] light from this active galaxy is estimated to have taken around 4.5 billion years to reach Earth.^[2] But as a result of the expansion of the Universe, the present (co-moving) distance to this galaxy is about 5.4 billion light-years (1647 Mpc).^[2] Even at this great distance this blazar has an apparent magnitude of about 15.5.^[1] Although 0.444 is used as the common redshift value, 0.3347 is a new strict lower limit "inferred through observing the far-UV absorption by the low-z IGM."^[3]

3C 66A underwent an optical outburst in 2007 August, as monitored by the Tuorla blazar monitoring program.^[4] The event was monitored by the Whole Earth Blazar Telescope project.

References

^ ^a ^b ^c ^d ^e ^f ^g ^h "3C 66A". SIMBAD Astronomical Database. Retrieved 2010-04-01.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ "NASA/IPAC Extragalactic Database". Results for 3C 066A. Retrieved 2010-04-01.
^ Furniss, Amy (May 10, 2013). "THE FIRM REDSHIFT LOWER LIMIT OF THE MOST DISTANT TeV-DETECTED BLAZAR PKS 1424+240". Astrophysical Journal Letters. 768 (2): L31. arXiv:1304.4859. Bibcode:2013ApJ...768L..31F. doi:10.1088/2041-8205/768/2/L31. S2CID 21291053.
^ Errando, Manel; Lindfors, Elina; Mazin, Daniel; Prandini, Elisa; Tavecchio, Fabrizio (2009). "A TeV source in the 3C 66A/B region". arXiv:0907.0994 [astro-ph.HE].

External links

Wikisky image of 3C 66A with 3C 66B (PGC 9067) near the lower left
The galaxy 3C 66B with 3C 66A in the North-West

Constellation of Andromeda

Stars

Bayer	α (Alpheratz) β (Mirach) γ (Almach) δ ε ζ η θ ι κ λ μ ν ξ (Adhil) ο π ρ σ τ υ (Titawin) φ χ ψ ω A b c υ Per (Nembus)
Flamsteed	2 3 4 5 6 7 8 9 10 11 12 13 14 (Veritate) 15 18 22 23 26 28 32 36 39 41 44 45 47 55 56 58 59 63 64 65 66 6 Per
Variable	R T U W Z RT RV RX SU SW TU TW WZ XZ AB AC AD AE AF AR BM BX CC CG CN DS DX EG ET EU FF GP GQ GX GR GY HH HN IW KK KX KZ LL LN LP LQ OP OS OU PX PY QO QR QV QX V385 V428 V439 V455 V529 V807
HR	1 40 56 78 104 122 134 178 275 282 283 289 379 410 483 687 746 748 8884 8925 8950 8962 8973 9011 9074 9075 9105
HD	16175 (Buna) 222155
Other	3XMM J004232.1+411314 ADS 48 HAT-P-6 (Sterrennacht) HAT-P-16 HAT-P-19 HAT-P-28 M31-RV KELT-1 NGC 44 NGC 82 NGC 84 NGC 91 NGC 162 NGC 464 Qatar-3 Qatar-4 PA-99-N2 WASP-1 WISE 0146+4234 WISE J0005+3737 WISE J004945.61+215120.0

Exoplanets	14 Andromedae b κ Andromedae b υ Andromedae b c d Gliese 15 Ab c HD 13931 b HD 16175 b HAT-P-6b HAT-P-32b WASP-1b WASP-33b Qatar-4b Qatar-5b

Star
clusters

NGC	206 272 752 956 7686
Other	Mayall II RBC EXT8

Nebulae

NGC	7662

Galaxies

Messier	32 110
NGC	5 11 13 19 20 21 27 39 43 48 49 51 67 68 69 70 71 72 74 76 79 80 81 83 85 86 90 93 94 96 97 108 109 112 140 149 160 169 181 183 184 214 218 226 228 229 233 243 252 258 260 262 280 304 317 389 393 404 425 431 477 512 513 523 528 529 531 536 542 561 605 620 668 679 687 700 703 704 705 708 709 710 712 714 717 721 732 753 759 801 812 834 891 906 910 911 912 913 920 937 980 995 996 999 1000 7640 7836
Numbered	I II III IV V VIII IX X XI XVIII XIX XXI
Other	3C 66A 3C 66B Andromeda Galaxy Arp 273 Donatiello I