Common Name: 4C +31.56 MOJAVE 15 GHz [Total intensity movie]   | [Polariz. movie] Kpc-scale: Kharb, Lister, and Cooper 2010, ApJ 710, 764
B1950 Name: 2021+317 2 cm VLBA Image map
J2000 Name: J2023+3153
R.A. and Dec. (J2000): 20h23m19.017s
+31d53'2.306"
AGN Class: LSP BL Lac
Redshift: 0.356 (V.Chavushyan2013)
Luminosity Distance: 1882 Mpc ; 4.96 pc/mas
Radio Spectrum: Flat
Gamma-ray Association LAT: Y, EGRET: N, TeV: N
Kpc-scale morphology: One-sided Halo
Jet Speed: Maximum: 208 11 μas/y ; 4.56 0.24 c
Median: 95 7 μas/y ; 2.08 0.16 c
based on 6 moving features
Lister et al. 2016,AJ,152,12
Separation Versus Time Plot: PNG    PS
Stacked epoch 15 GHz VLBA images:
Natural weight: [PS]   [GIF]
Uniform weight: [PS]   [GIF]

Rotation Measure Map: | 2006_08_09 |

Spectral Index Map: | 2006_08_09 |


Multifrequency MOJAVE VLBA Data:

Epoch
8.1 GHz
8.4 GHz
12.1 GHz
2006-08-09
uvf  
uvf  
uvf  

VLBA 1.4 GHz: University College Cork Program
Multiepoch Radio Spectrum:
1.4 GHz Image
Multiepoch Radio Spectrum
Comments: Ratan suggests GPS but spectrum is variable; low galactic latitude; z=0.356 is tentative

If you intend to use these data in a publication, we ask that you please let us know 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.">
Epoch
(Y-M-D)
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
2013-07-30 BL178BG 1188 24 2.0 69 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2012-09-02 BL178AO 1242 5.9 0.5 161 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2012-01-14 BL178AF 1273 30 2.4 123 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2011-07-15 BL149DM 1196 15 1.3 123 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2011-02-20 BL149DB 1186 23 2.0 133 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2010-09-17 BL149CP 1083 21 2.0 122 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2010-01-16 BL149CG 1055 16 1.5 138 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2009-03-25 BL149BJ 1180 36 3.1 112 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2008-07-30 BL149AL 1108 19 1.7 119 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2007-08-09 BL149AE 1051 24 2.3 111 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2006-08-09 BL137H 919 31 3.4 116 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2005-09-16 BL123M 761 12 1.5 137 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2005-03-23 BL123D 693 8.7 1.3 101 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2004-06-11 BL111M 665 11 1.6 85 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2003-02-05 BL111E 605 14 2.4 37 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2001-06-20 BZ026 614 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
2001-03-04 BK068E 634 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1999-05-21 BK068A 1004 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1997-08-28 BK052A 1373 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1996-05-16 BK037B 2088 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1995-04-07 BK016 2157 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1995-01-20 BP14 1908 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS

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