Common Name: 4C +31.56 MOJAVE 15 GHz [Total intensity movie]   | [Polariz. movie] VLBA 1.4 GHz: University College Cork Program
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.Chavushyan2013priv.comm.)
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: 213 ± 13 μas/y ; 4.68 ± 0.28 c
Median: 104 ± 13 μas/y ; 2.28 ± 0.28 c
based on 7 moving features
Lister et al. 2019, ApJ,874,43
Separation Versus Time Plot: PNG    PDF
Stacked 15 GHz Stokes I VLBA images:
Natural weight:   PNG PDF FITS
Circular Beam:   PNG PDF FITS
Tapered Beam:   PNG PDF FITS
Stacking for 1994-2015:   FITS

Stacked 15 GHz Polarization VLBA images:
Method I:   Cumulative GIF, pol PNG, I FITS, P FITS, m FITS, EVPA FITS
Method II:   std EVPA PNG, FITS

Rotation Measure 8-15 GHz Map: | 2006_08_09 |

Spectral Index 8-15 GHz Map: | 2006_08_09 |


Multifrequency MOJAVE VLBA Data:

Epoch
8.1 GHz
8.4 GHz
12.1 GHz
2006-08-09
uvf  FITS  PNG  PDF 
uvf  FITS  PNG  PDF 
uvf  FITS  PNG  PDF 

VLBA 23 GHz: RRIFD Database
Kpc-scale: Kharb, Lister, and Cooper 2010, ApJ 710, 764
23 GHz Image
Kpc Image

Fermi LAT and 15 GHz VLBA Light Curves

Fermi LAT and 15 GHz VLBA Light Curves
VLBA 43 GHz: Cheng et al. 2020
Multiepoch Radio Spectrum:
43 GHz Image
Radio Spectrum
Comments: Ratan suggests GPS but spectrum is variable; low b; z=0.356 from V.Chavushyan2013 is unpublished

If you use these data in a publication, we ask that you please contact us so we can add a link to the list of external MOJAVE publications, and ask that you cite Lister et al., 2018, ApJS, 234, 12 and 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. 2018)"

Important Note: The MOJAVE team, working with the OVRO 40m AGN monitoring team checks and adjusts the flux density scaling of the MOJAVE VLBA data for possible systematics based on near-simultaneous OVRO 40m measurements at 15 GHz. Asterisked entries below denote epochs that have not yet been checked and corrected.
Epoch
(YYYY-MM-DD)
VLBA Code VLBA I
(mJy)
VLBA P
(mJy)
VLBA
P (%)
VLBA
EVPA (deg.)
I Image (Nat. Weight) Visibility
Data
Stokes I Radplot Polarization
Image
Full
Montage
2023-12-15 * BL286BB 877 34 3.9 72 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2023-05-27 * BL286AU 780 21 2.7 82 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2022-09-29 BL286AO 1008 34 3.4 90 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2022-02-24 BL286AH 1202 34 2.8 86 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2021-08-07 BL286AA 1124 41 3.6 117 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2013-07-30 BL178BG 1170 23 2.0 68 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2012-09-02 BL178AO 1230 6.5 0.5 166 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2012-01-14 BL178AF 1257 27 2.1 120 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2011-07-15 BL149DM 1195 14 1.2 125 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2011-02-20 BL149DB 1173 25 2.2 132 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2010-09-17 BL149CP 1080 18 1.7 121 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2010-01-16 BL149CG 1044 17 1.6 139 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2009-03-25 BL149BJ 1176 34 2.9 110 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2008-07-30 BL149AL 1103 22 2.0 121 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2007-08-09 BL149AE 1048 24 2.3 111 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2006-08-09 BL137H 911 23 2.5 117 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2005-09-16 BL123M 730 9.7 1.3 122 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2005-03-23 BL123D 674 9.1 1.4 106 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2004-06-11 BL111M 651 12 1.8 89 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2003-02-05 BL111E 587 15 2.6 49 FITS   PNG   PDF UVF PNG   PDF p:PNG  p:PDF   f:PNG  f:PDF PNG
2001-06-20 BZ026 599 no data FITS   PNG   PDF UVF PNG   PDF PNG
2001-03-04 BK068E 617 no data FITS   PNG   PDF UVF PNG   PDF PNG
1999-05-21 BK068A 979 no data FITS   PNG   PDF UVF PNG   PDF PNG
1997-08-28 BK052A 1338 no data FITS   PNG   PDF UVF PNG   PDF PNG
1996-05-16 BK037B 2083 no data FITS   PNG   PDF UVF PNG   PDF PNG
1995-04-07 BK016 2160 no data FITS   PNG   PDF UVF PNG   PDF PNG
1995-01-20 BP14 1904 no data FITS   PNG   PDF UVF PNG   PDF PNG
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