A BL Lacertae object or BL Lac object is a type of active galactic nucleus (AGN) or a galaxy with such an AGN, named after its prototype, BL Lacertae....

BL Lac may refer to: BL Lacertae, an active galaxy, prototype of the BL Lacertae objects BL Lacertae object, a type of active galaxy, based on the prototype...

namesake of the class of active galactic nuclei known as "BL Lacertae objects" or "BL Lac objects". This class is distinguished by rapid and high-amplitude...

category includes BL Lac objects and optically violently variable (OVV) quasars. The generally accepted theory is that BL Lac objects are intrinsically...

PKS 0735+178 is a classical BL Lac object in the northern constellation of Gemini. This is one of the brightest objects of its type in the night sky....

AO 0235+164 is a BL Lacertae object (BL Lac object) located in the constellation of Aries, 7.5 billion light years from Earth. It has a redshift of 0...

S5 1803+784 is a BL Lacertae object located in the far northern constellation of Draco. It has an estimated redshift of (z) 0.68 and was first discovered...

S2CID 118885000. Chiaberge, M.; Capetti, A.; Celotti, A. (30 June 2024). "The BL Lac heart of Centaurus A". Oxford Academic. Monthly Notices of the Royal Astronomical...

"Blazars" (BL Lac objects and OVV quasars) classes are distinguished by rapidly variable, polarized optical, radio and X-ray emission. BL Lac objects show no...

1ES 1959+650 is a BL Lacertae object or a BL Lac object located in the eastern constellation of Draco, about 676 million light years from Earth. It was...

1ES 1741+196 is a BL Lacertae object (BL Lac) located in the constellation of Hercules. It is located 1.2 billion light years from Earth. It was first...

light-years). It is the closest radio galaxy to Earth, as well as the closest BL Lac object, so its active galactic nucleus has been extensively studied by professional...

H1426+428 also known as 1ES 1426+428, is a high-frequency peaked BL Lacertae object (HBL) located in the constellation of Boötes. It is located at a relatively...

1ES 0229+200 is a relatively distant BL Lacertae object (BL Lac) located in the constellation of Aries, 1.9 billion light years from Earth. It has a redshift...

3C 371 is a BL Lac object located in the constellation Draco. With a redshift of 0.051, this active galaxy is about 730 million light-years away. 3C 371...

the apparently faster-than-light motion seen in some radio galaxies, BL Lac objects, quasars, blazars and recently also in some galactic sources called...

OJ 287 is a BL Lac object 4 billion light-years from Earth that has produced quasi-periodic optical outbursts going back approximately 120 years, as first...

black holes — galaxy hosting a dual AGN OJ 287 core black holes — a BL Lac object with a candidate binary supermassive black hole core system PG 1302-102...

Array, detected a single fading radio source within the error box, a BL Lac object. An article was written for Nature stating that this event proved that...

– a quasar with a relativistic jet pointing directly towards Earth – of BL Lac-type. With a redshift of 0.3365 ± 0.0010, it has a luminosity distance of...

PKS 2155-304 is a BL Lac object, a galaxy hosting a type of blazar. It is a strong emitter from radio to high-energy frequencies. PKS 2155-304 is at redshift...

star-like object, PKS 1144-379 has been identified as BL lac object of Mv ≈16.2, due to its variability in optical, infrared, and radio wavelengths. Such BL Lac...

AP Librae is a BL Lacertae object located at a distance of 700 million light years in the southern constellation of Libra. In the visual band it is one...

rays. It is a blazar or BL Lac object, which is an active galactic nucleus with a jet that is shooting towards the Earth. The object has a redshift of z =...

nucleus. In even shorter wavelengths, the BL Lac object PG 1553+113 is a heavy emitter of gamma rays. This object is the most distant found to emit photons...

is some controversy as to whether UHURU might not have detected the BL Lac object 1E 1207.9 +3945, which is inside their error box - the later HEAO 1...

the source (BL Lac object) is a strong emitter from radio to gamma frequencies. The object is at a redshift of z = 0.056. This object first came of...

archaic. At visible wavelengths, they are similar in appearance to BL Lac objects but generally have stronger broad emission lines. 3C 279 S5 0014+81...

sample: e.g. the radio galaxy 3C 66B is part of the sample, but the BL Lac object 3C 66A is not. Edge, DO; Shakeshaft, JR; McAdam, WB; Baldwin, JE; Archer...

these energies. 2018: detection of VHE gamma rays from direction of the BL Lac object TXS 0506+056, that is coincident with the high-energy neutrino event...