2024RNAAS...8..308K

Query : 2024RNAAS...8..308K

2024RNAAS...8..308K - Research Notes of the AAS, 8, 308 (2024/December-0)

The γ-Ray-emitting BL Lac 4FGL J1219.0+3653 in the Radio.

KREZINGER M., GABANYI K.E. and FREY S.

Abstract (from CDS):

We collect radio data of 4FGL J1219.0+3653, the first γ-ray BL Lac candidate known above redshift 3. We analyze total flux density measurements covering a wide frequency range (0.33-5 GHz) as well as the only available very long baseline interferometry (VLBI) data. The radio spectrum is flat. Based on the radio data, there is no evidence that the compact jet emission is Doppler-enhanced, at odds with the BL Lac classification. The Gaia-VLBI optical-radio positional offset is ∼9 mas which appears larger than usual in a blazar-like source but is still within 3σ uncertainties.

Journal keyword(s): Extragalactic radio sources - Active galactic nuclei - BL Lacertae objects - Gamma-ray sources - Radio continuum emission - Very long baseline interferometry

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	SDSS J121915.42+365718.5	BLL	12 19 15.4131373739	+36 57 18.499364984						~	28	1

Query : 2024RNAAS...8..308K

Basic data :

SDSS J121915.42+365718.5 -- BL Lac

Rad (FIRST,GB6,...), QSO (2014A&A), BLL (2020ApJ), Bz? (2022ApJS), * (Gaia), gam (4FGL), Opt (SDSS)

12 19 15.4131373739 +36 57 18.499364984 (Optical) [ 2.0970 1.0992 90 ] A 2018yCat.1345....0G

12 16 45.6015294328 +37 13 57.273312073 [ 2.0970 1.0992 90 ]

155.6243302865830 +78.0498752167839 [ 2.0970 1.0992 90 ]

4.988 3.185 [3.512 2.775 90] A 2018yCat.1345....0G

V(km/s) 272623 [~] / z(spectroscopic) 3.590000 [~] / cz 1076254.92 [~] (Opt) D 2018A&A...613A..51P

G 20.789391 [0.029650] C 2020yCat.1350....0G

u (AB) 24.243 [0.942] D 2014A&A...563A..54P

g (AB) 21.8234 [0.0652] C 2020ApJS..250....8L

r (AB) 20.9723 [0.0456] C 2020ApJS..250....8L

i (AB) 20.5718 [0.0451] C 2020ApJS..250....8L

z (AB) 20.3762 [0.1268] D 2020ApJS..250....8L

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`SDSS J121915.42+365718.5`	`GB6 B1216+3713`	`TGSSADR J121915.3+365716`	`Gaia DR3 1531536512566805120`
`4FGL J1219.0+3653`	`ILT J121915.41+365718.7`	`WN B1216.7+3714A`
`FIRST J121915.4+365719`	`NVSS J121915+365718`	`Gaia DR2 1531536512566805120`

References (28 between 1850 and 2026) (Total 28)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : SDSS J121915.42+365718.5

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`SDSS J121915.42+365718.5`	`FIRST J121915.4+365719`	`NVSS J121915+365718`	`WN B1216.7+3714A`	`Gaia DR2 1531536512566805120`
`Gaia DR3 1531536512566805120`

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