VLA calibrator information for 0555+3948

This page summarizes the information for 0555+3948 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
 ===================================================================
 0555+398   J2000  A 05h55m30.805608s  39d48'49.165000"  Aug01         
 0552+398   B1950  A 05h52m01.407200s  39d48'21.946000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P P P       1.70
   6cm    C  P P P P       5.00
 3.7cm    X  P P P P       6.20
   2cm    U  P P P P       2.80
 0.7cm    Q  S S S S       2.5

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)
20171210	2.011	J0555+3948
20190729	1.770	J0555+3948
20191016	1.781	J0555+3948
20230529	1.817	J0555+3948
S-band data (filled triangles)
20170909	3.913	J0555+3948
20171210	4.138	J0555+3948
20181129	1.582	J0555+3948
20190503	3.835	J0555+3948
20211209	3.858	J0555+3948
C-band data (open squares)
20170527	4.140	J0555+3948
20170812	4.038	J0555+3948
20171031	4.227	J0555+3948
20171125	4.045	J0555+3948
20171210	4.146	J0555+3948
20181118	2.162	J0555+3948
20190406	3.822	J0555+3948
20190804	3.848	J0555+3948
X-band data (X-crosses)
20171210	3.201	J0555+3948
20180210	3.149	J0555+3948
U-band data (filled squares)
20170608	2.131	J0555+3948
20170610	2.311	J0555+3948
20170611	2.257	J0555+3948
20170810	2.251	J0555+3948
K-band data (open circles)
20170529	1.792	J0555+3948
20170603	1.796	J0555+3948
20170616	1.829	J0555+3948
20170810	1.831	J0555+3948
20171210	1.991	J0555+3948
20181122	2.365	J0555+3948