VLA calibrator information for 2011-0644

This page summarizes the information for 2011-0644 as found in the original VLA calibrator list and, if found there, a link to search the NRAO VLA Archive Survey (NVAS) for calibrator data before 2010. Furthermore, a table with the most recent approximate flux densities, starting from 2017 as mined from the VLA CASA pipeline is presented.

If shown at the top, we have recovered the original, pre-WIDAR ANTSOL flux density solutions from the period roughly 2000-2007; symbols as explained next.
The mined data are plotted (gray, on the left hand side) as function of (log) frequency on the top and as function of time on the bottom. The frequency band symbols in the bottom panel follow the symbols as outlined in the top panel:

4-band  (~75 MHz) horizontal stripe       X-band (~10.0 GHz) cross
P-band (~350 MHz) open triangle        U/Ku-band (~15.0 GHz) filled square
L-band (~1.5 GHz) VLA-Y shape             K-band (~22.2 GHz) open circle
S-band (~3.0 GHz) filled triangle      A/Ka-band (~33.2 GHz) 6-pointed star
C-band (~6.0 GHz) open square             Q-band (~45.0 GHz) filled circle

Assume a 10% flux density error on each point, up to 30% for the higher frequency data points. The dashed lines in the frequency plot indicate the approximate spectral index in the frequency band (tied to the measured flux density).
Depending on the spectral behavior, different receiver observing bands (as indicated with the log-frequency axis) may have very different typical flux densities. Note that there can be significant flux density changes for different array configurations, which start date is indicated at the top of the time-line figure. Calendar years are separated by vertical dotted lines.
If shown, a curve depicts a fit to the (unweighted) average data for each band (if there are more than two bands with measured flux densities). The fit equation is listed at the top where the x-coordinate represents the base-10 log of the frequency (GHz) and the y-coordinate represents the base-10 log of the flux density (mJy/bm). The fit may use more data than shown and is using data with different time stamps, which means typically different flux densitities in a single band for genuine variable sources (and/or observed in different array configurations).
Depending on the variability of the source, array configuration and the quality of the data, this fit may, or may not, be representative for the data!

(Click on the figure for a larger view in a new tab/window)

Original (outdated) VLA calibrator list information:

 IAU NAME EQUINOX  PC RA(hh,mm,ss)    DEC(ddd,mm,ss)   POS.REF ALT.NAME
 ===================================================================
 2011-067   J2000  A 20h11m14.215847s -06d44'03.555190"  Aug01         
 2008-068   B1950  A 20h08m33.699400s -06d53'01.672000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P P P       2.60
   6cm    C  P P P P       1.3
 3.7cm    X  X X X X       0.85
   2cm    U  X X X X       0.49
 0.7cm    Q  S S S S       0.8

Default NVAS search around this position (in new tab/window)

Results from CASA pipeline flux density mining:

Observing date (UT)	Flux density (Jy/bm)	Source name used
L-band data ("VLA Y-arm" symbols)
20170521	2.539	J2011-0644
20190728	2.568	J2011-0644
S-band data (filled triangles)
20181009	2.164	J2011-0644
20181009	1.681	J2011-0644
20181110	2.021	J2011-0644
20181110	3.569	J2011-0644
20181111	9.091	J2011-0644
C-band data (open squares)
20171210	1.101	J2011-0644
20180910	2.519	J2011-0644
20180910	4.562	J2011-0644
20180912	6.184	J2011-0644
20180915	1.371	J2011-0644
20180919	1.327	J2011-0644
20180919	7.084	J2011-0644
20180919	5.220	J2011-0644
20180920	1.751	J2011-0644
20180920	4.647	J2011-0644
20180920	6.216	J2011-0644
20180924	1.366	J2011-0644
20180925	1.368	J2011-0644
20180926	5.756	J2011-0644
20180926	7.702	J2011-0644
20180926	4.651	J2011-0644
20180927	6.046	J2011-0644
20180927	3.964	J2011-0644
20180928	5.739	J2011-0644
20180930	9.670	J2011-0644
20181002	4.822	J2011-0644
20181002	5.275	J2011-0644
20181003	7.186	J2011-0644
20181004	3.525	J2011-0644
20181005	4.916	J2011-0644
20181005	5.546	J2011-0644
20181005	1.458	J2011-0644
20181005	2.610	J2011-0644
20181006	3.991	J2011-0644
20181006	4.784	J2011-0644
20181007	7.742	J2011-0644
20181007	2.905	J2011-0644
20181007	1.500	J2011-0644
20181007	1.358	J2011-0644
20181008	4.713	J2011-0644
20181008	5.636	J2011-0644
20181009	4.852	J2011-0644
20181009	12.067	J2011-0644
20181216	1.161	J2011-0644