VLA calibrator information for 0948+0022

This page summarizes the information for 0948+0022 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
 ===================================================================
 0948+003   J2000  B 09h48m57.3209s    00d22'25.563"     May02  JVAS  
 0946+006   B1950  B 09h46m23.2595s    00d36'25.206"  
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
 0.7cm    Q  W W W W       0.33

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
S-band data (filled triangles)
201904170.155J0948+0022
201904170.156J0948+0022
K-band data (open circles)
201812100.356J0948+0022
201812170.315J0948+0022
201902210.214J0948+0022
201902210.212J0948+0022
201902250.215J0948+0022
201902250.213J0948+0022
A-band data (6-pointed stars)
201710150.334J0948+0022
201710160.328J0948+0022
201710220.343J0948+0022
201902180.262J0948+0022
201902180.259J0948+0022
201902240.245J0948+0022
201902250.241J0948+0022
201902260.235J0948+0022
202001260.1770948+003
Q-band data (filled circles)
202103230.248J0948+0022
202103230.224J0948+0022
202104060.237J0948+0022
202104110.295J0948+0022
202104280.342J0948+0022
202105170.288J0948+0022
202105230.101J0948+0022
202105300.338J0948+0022
202212140.731J0948+0022