VLA calibrator information for 0842+1835

This page summarizes the information for 0842+1835 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
 ===================================================================
 0842+185   J2000  A 08h42m05.094180s  18d35'40.990610"  Aug01         
 0839+187   B1950  A 08h39m14.084300s  18d46'27.275000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P P P       1.40
   6cm    C  P P P P       1.00
 3.7cm    X  P P P P       0.81
   2cm    U  S S S S       0.60
 0.7cm    Q  W W W W       0.29

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)
201707220.936J0842+1835
201707230.930J0842+1835
201707230.934J0842+1835
201707240.904J0842+1835
201801221.048J0842+1835
201803211.002J0842+1835
201812160.996J0842+1835
201812171.775J0842+1835
201901031.154J0842+1835
201901221.415J0842+1835
201901232.156J0842+1835
201901270.985J0842+1835
201901301.021J0842+1835
201902031.016J0842+1835
201902031.030J0842+1835
201902041.019J0842+1835
201902041.016J0842+1835
201905200.986J0842+1835
201905210.979J0842+1835
201906190.981J0842+1835
201908090.991J0842+1835
201908151.015J0842+1835
201908161.020J0842+1835
201908171.007J0842+1835
201908180.998J0842+1835
201908191.013J0842+1835
201908201.012J0842+1835
201908211.051J0842+1835
201908221.007J0842+1835
201909130.989J0842+1835
201909250.981J0842+1835
201910041.005J0842+1835
201910190.963J0842+1835
201910200.967J0842+1835
202305071.038J0842+1835
S-band data (filled triangles)
201705280.838J0842+1835
201706160.835J0842+1835
201706190.846J0842+1835
201706250.831J0842+1835
201707010.835J0842+1835
201707070.830J0842+1835
201707080.830J0842+1835
201707090.835J0842+1835
201707140.827J0842+1835
201901020.851J0842+1835
201901140.862J0842+1835
201905200.877J0842+1835
201905210.850J0842+1835
201906190.855J0842+1835
201908090.832J0842+1835
201908170.860J0842+1835
201908200.866J0842+1835
201909150.826J0842+1835
201910040.853J0842+1835
201910040.867J0842+1835
201910050.863J0842+1835
201910190.837J0842+1835
201910200.841J0842+1835
202106050.929J0842+1835
C-band data (open squares)
201905210.716J0842+1835
201908140.746J0842+1835
201908160.747J0842+1835
201908190.780J0842+1835
201910070.779J0842+1835
201910200.733J0842+1835
202102030.781J0842+1835
202110110.826J0842+1835
X-band data (X-crosses)
201904250.631J0842+1835
201904250.658J0842+1835
201904260.665J0842+1835
201905210.564J0842+1835
201908170.637J0842+1835
201908250.642J0842+1835
201908300.543J0842+1835
201910200.576J0842+1835
202110100.623J0842+1835
U-band data (filled squares)
201908210.693J0842+1835
201908220.496J0842+1835
202101110.562J0842+1835