Common Name: S4 1800+44 MOJAVE 15 GHz [Total intensity movie]   | [Polariz. movie] VLBA 1.4 GHz: University College Cork Program
B1950 Name: 1800+440 2 cm VLBA Image map
J2000 Name: J1801+4404
R.A. and Dec. (J2000): 18h1m32.315s
+44d4'21.900"
AGN Class: LSP HPQ
Redshift: 0.663 (1982MNRAS.200..191W)
Luminosity Distance: 3984 Mpc ; 6.98 pc/mas
Radio Spectrum: Flat
Gamma-ray Association LAT: Y, EGRET: N, TeV: N
Kpc-scale morphology: Two-sided
Jet Speed: Maximum: 444 38 μas/y ; 16.8 1.4 c
Median: 395 28 μas/y ; 14.9 1.0 c
based on 5 moving features
Lister et al. 2021, ApJ, in press
Separation Versus Time Plot: PNG    PS
Stacked epoch 15 GHz VLBA images:
Uniform weight: [PS]   [GIF]
Natural weight: [PS]   [GIF]
Circular Beam : [PS]   [GIF]
Tapered Beam: [PS]   [GIF]
Pushkarev et al. 2017 :   FITS

Rotation Measure Map: | 2006_04_28 |

Spectral Index Map: | 2006_04_28 |


Multifrequency MOJAVE VLBA Data:

Epoch
8.1 GHz
8.4 GHz
12.1 GHz
2006-04-28
uvf  
uvf  
uvf  

Univ. College Cork VLBA L Band Data:

Epoch
1.35 GHz
1.4 GHz
1.5 GHz
1.7 GHz
2010-03-07
uvf  
uvf  




VLBA 23 GHz: RRIFD Database
Kpc-scale: Reid et al. 1995, AASup, 110,213
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: MOJAVE_1 source

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 group, has discovered a systematic error in the flux densities of all VLBA 15 GHz observations taking place after a date that lies between 2019 April 16 and 2019 May 16. All observations after that date have correlated flux densities that are between 10% and 20% too low. The MOJAVE team and NRAO are currently investigating the issue.

Asterisked entries below denote epochs that have not yet been corrected for the VLBA flux density scaling problem.
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
2013-08-20 BL178BI 779 18 2.3 122 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2013-05-05 BL178BC 840 15 1.8 104 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2012-11-21 BL178AT 928 20 2.1 126 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2012-08-03 BL178AN 640 27 4.2 122 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2011-03-05 BL149DD 506 8.7 1.7 5 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2009-12-17 BL149CE 964 23 2.4 133 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2008-08-25 BL149BB 1317 43 3.3 41 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2007-03-28 BL137P 1736 20 1.1 30 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2006-04-28 BL137D 1379 39 2.8 101 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2005-03-05 BL123C 656 25 3.8 114 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2004-12-02 BL111Q 760 19 2.4 110 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2004-08-09 BL111N 1300 22 1.7 122 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2003-03-29 BL111G 1166 10 0.9 49 FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS PNG   PS
2001-12-30 BR077H 1044 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
2000-12-28 BK068F 637 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1999-01-02 BG077D 760 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1997-03-13 BK048B 1191 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1996-05-16 BK037B 1480 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
1995-04-07 BK016 969 no data FITS   PNG   PS FITS   PNG   PS PNG   PS uvf   PNG   PS
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