VLA calibrator information for 1922+1530

This page summarizes the information for 1922+1530 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
 ===================================================================
 1922+155   J2000  B 19h22m34.699188s  15d30'10.032130"  Aug01         
 1920+154   B1950  B 19h20m18.227000s  15d24'21.354000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  X X X X       0.50
   6cm    C  P P P P       0.80            6
 3.7cm    X  P P P P       1.00
   2cm    U  S S S S       0.70            6
 0.7cm    Q  W W W W       0.28

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
C-band data (open squares)
201712240.480J1922+1530
201805150.493J1922+1530
201908040.582J1922+1530
202207260.843J1922+1530
X-band data (X-crosses)
201706020.457J1922+1530
201706240.476J1922+1530
201802190.624J1922+1530
201812150.646J1922+1530
201902070.607J1922+1530
201903120.606J1922+1530
201903240.602J1922+1530
202203080.787J1922+1530
K-band data (open circles)
201809080.627J1922+1530
201809180.584J1922+1530
201810100.562J1922+1530
201812140.629J1922+1530
201902260.655J1922+1530
201908020.667J1922+1530
201908120.642J1922+1530
A-band data (6-pointed stars)
201811080.479J1922+1530
201908180.545J1922+1530
201910070.500J1922+1530
Q-band data (filled circles)
201910120.479J1922+1530