VLA calibrator information for 2049+1003

This page summarizes the information for 2049+1003 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
 ===================================================================
 2049+100   J2000  A 20h49m45.864995s  10d03'14.398900"  Aug01         
 2047+098   B1950  A 20h47m20.780000s  09d52'02.041000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  X X X X       0.30
   6cm    C  S S S S       0.60
 3.7cm    X  S S S S       0.40
   2cm    U  S S S S       0.9
 0.7cm    Q  S S S S       0.8

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)
201710080.616J2049+1003
201710270.668J2049+1003
202007160.589J2049+1003
202007210.585J2049+1003
202008100.599J2049+1003
202008290.615J2049+1003
C-band data (open squares)
201712160.764J2049+1003
201901010.693J2049+1003
201905240.625J2049+1003
201906190.646J2049+1003
201906200.609J2049+1003
201908080.632J2049+1003
201908080.590J2049+1003
201909070.620J2049+1003
201910050.640J2049+1003
X-band data (X-crosses)
201905220.568J2049+1003
201905290.586J2049+1003
201906190.596J2049+1003
201906200.568J2049+1003
201908080.581J2049+1003
201908080.551J2049+1003
201909070.569J2049+1003
201910050.604J2049+1003
U-band data (filled squares)
201905240.535J2049+1003
201905290.551J2049+1003
201906200.534J2049+1003
201909070.531J2049+1003
K-band data (open circles)
201711260.696J2049+1003
201905290.510J2049+1003
201906200.490J2049+1003
201909070.481J2049+1003
A-band data (6-pointed stars)
201905290.445J2049+1003
201906200.418J2049+1003