MOJAVE Sample: 2021+317

Common Name:	4C +31.56	MOJAVE 2cm [Total intensity movie] \| [Polariz. movie]	Kpc-scale: Kharb, Lister, and Cooper 2010, ApJ 710, 764
B1950 Name:	2021+317
J2000 Name:	J2023+3153
R.A. and Dec. (J2000):	20h23m19.017s +31d53'2.306"
AGN Class:	U
Redshift:	0.356 (V. Chavushyan 2013, priv. comm.)
Luminosity Distance:	1882 Mpc ; 4.96 pc/mas
Radio Spectrum:	Flat
Gamma-ray Association	LAT: N, EGRET: N, TeV: N
Kpc-scale morphology:	One-sided Halo
Max. Jet Speed:	295 ± 36 μas/y ; 6.47 c Lister et al. 2009, AJ, 138,1874
Separation Versus Time Plot:	GIF PS
Stacked epoch 15 GHz VLBA images: Natural weight: [PS] [GIF] Uniform weight: [PS] [GIF] Rotation Measure Map: \| 2006_08_09 \|		VLBA mm-wave image: USNO RRFID Survey	Radio Spectrum (multiepoch plot):

Comments:	Ratan suggests GPS but spectrum is variable; low galactic latitude, MOJAVE 20 cm VLA image shows halo

If you intend to use these data in a publication, we ask that you please contact us so we can add a link to our external publications page, and that you include the following acknowledgment: "This research has made use of data from the MOJAVE database that is maintained by the MOJAVE team (Lister et al., 2009, AJ, 137, 3718)."

Available 2 cm VLBA Data
(Epoch entries without links are non-MOJAVE data available from the NRAO VLBA archive)
Epoch	VLBA Code	VLBA I (mJy)	VLBA P (mJy)	VLBA P (%)	VLBA EVPA (deg.)	I Image (Nat. Weight)	Tapered I Image	Tapered I Image (Widefield)	Visibility Data	Stokes I Radplot	Pol. Image
2012-09-02	BL178AO	1242	6	0.5	161	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2012-01-14	BL178AF	1274	30	2.4	123	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2011-07-15	BL149DM	1196	15	1.3	123	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2011-02-20	BL149DB	1186	23	1.9	133	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2010-09-17	BL149CP	1083	21	1.9	122	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2010-01-16	BL149CG	917	14	1.5	138	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2009-03-25	BL149BJ	1000	31	3.1	112	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2008-07-30	BL149AL	1108	19	1.7	119	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2007-08-09	BL149AE	1053	24	2.3	111	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2006-08-09	BL137H	916	31	3.4	116	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2005-09-16	BL123M	761	12	1.6	137	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2005-03-23	BL123D	686	9	1.3	104	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2004-06-11	BL111M	664	11	1.7	85	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2003-02-05	BL111E	606	14	2.3	37	FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS	JPG PS
2001-06-20	BZ026	614				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS
2001-03-04	BK068E	634				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS
1999-05-21	BK068A	1004				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS
1997-08-28	BK052A	1373				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS
1996-05-16	BK037B	2088				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS
1995-04-07	BK016	2157				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS
1995-01-20	BP14	1908				FITS JPG PS	FITS JPG PS	JPG PS	uvf	JPG PS