VLA calibrator information for 1327+2210

This page summarizes the information for 1327+2210 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
 ===================================================================
 1327+221   J2000  A 13h27m00.861311s  22d10'50.163060"  Aug01         
 1324+224   B1950  A 13h24m37.118600s  22d26'22.703000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P S X       1.02           10
   6cm    C  P P P P       1.5              
 3.7cm    X  P P P P       1.77             
   2cm    U  P P P P       1.6
 1.3cm    K  P P P P       1.47             
 0.7cm    Q  S S S S       0.9

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)
20190430	0.502	J1327+2210
20190523	0.489	J1327+2210
20190617	0.489	J1327+2210
20191007	0.552	J1327+2210
20191015	0.559	J1327+2210
S-band data (filled triangles)
20170921	0.502	J1327+2210
20170925	0.514	J1327+2210
20190401	0.639	J1327+2210
20190411	0.677	J1327+2210
20190412	0.669	J1327+2210
20190430	0.656	J1327+2210
20190805	0.681	J1327+2210
20190809	0.685	J1327+2210
20190815	0.667	J1327+2210
20190910	0.684	J1327+2210
20191015	0.716	J1327+2210
20200715	0.677	J1327+2210
20200907	0.690	J1327+2210
20211010	0.580	J1327+2210
20211115	0.645	J1327+2210
20211117	0.626	J1327+2210
20211129	0.507	J1327+2210
20220620	0.542	J1327+2210
20220621	0.527	J1327+2210
C-band data (open squares)
20171128	0.556	J1327+2210
20180101	0.543	J1327+2210
20180309	0.531	J1327+2210
20190508	0.922	J1327+2210
20190817	0.858	J1327+2210
20191007	0.894	J1327+2210
20210615	0.616	J1327+2210
20210814	0.588	J1327+2210
20210814	0.589	J1327+2210
20210821	0.571	J1327+2210
20210926	0.554	J1327+2210
20211224	0.580	J1327+2210
20220317	0.513	J1327+2210
20220611	0.495	J1327+2210
20220612	0.493	J1327+2210
20220703	0.504	J1327+2210
X-band data (X-crosses)
20180219	0.520	J1327+2210
20190321	1.033	J1327+2210
20190403	1.045	J1327+2210
20190803	0.879	J1327+2210
20190805	0.886	J1327+2210
20190809	0.898	J1327+2210
20210424	0.583	J1327+2210
20210612	0.544	J1327+2210
20220524	0.471	J1327+2210
20220528	0.480	J1327+2210
U-band data (filled squares)
20180410	0.527	J1327+2210
K-band data (open circles)
20180907	0.784	UR56917_gain
20180910	0.866	UR56917_gain
20180910	0.769	UR56917_gain
20180914	0.863	UR56917_gain
20180915	0.807	UR56917_gain
20180915	0.779	UR56917_gain
20180922	0.787	UR56917_gain
20180923	0.844	UR56917_gain
20180928	0.750	UR56917_gain
20180929	0.759	UR56917_gain
20190901	0.894	J1327+2210
20200226	0.717	J1327+2210
A-band data (6-pointed stars)
20200314	0.829	J1327+2210
20200607	0.958	J1327+2210
20201214	0.546	J1327+2210
20201218	0.547	J1327+2210
20201220	0.541	J1327+2210
20201221	0.546	J1327+2210