VLA calibrator information for 2230+6946

This page summarizes the information for 2230+6946 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
 ===================================================================
 2230+697   J2000  A 22h30m36.469725s  69d46'28.076980"  Aug01         
 2229+695   B1950  A 22h29m11.655500s  69d31'02.647000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  S S S S       0.55
   6cm    C  P P P P       1.10
 3.7cm    X  S S S S       0.38
   2cm    U  P P P P       1.10
 0.7cm    Q  W W W W       0.3

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

WARNING: multiple positions found, using first one 337.6519571 +69.7744658 337.6519572 +69.7744658 Results from CASA pipeline flux density mining:
Observing date (UT)Flux density (Jy/bm)Source name used
C-band data (open squares)
201909100.9482230+697
201908250.747J2230+6946
201709180.817J2230+6946
201709210.810J2230+6946
201711080.835J2230+6946
201711130.872J2230+6946
201711180.868J2230+6946
202008210.943J2230+6946
202008230.938J2230+6946
202008260.943J2230+6946
202009060.881J2230+6946
202009100.879J2230+6946
201711090.926J2230+6946
201712170.863J2230+6946
201805060.908J2230+6946
201805070.886J2230+6946
X-band data (X-crosses)
201802100.822J2230+6946
K-band data (open circles)
202107130.712J2230+6946
202107170.553J2230+6946
202107200.584J2230+6946
202107250.584J2230+6946
202107300.564J2230+6946
202108090.568J2230+6946
A-band data (6-pointed stars)
201903220.480J2230+6946
202110160.543J2230+6946