VLA calibrator information for 1146+3958

This page summarizes the information for 1146+3958 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
 ===================================================================
 1146+399   J2000  A 11h46m58.297907s  39d58'34.304610"  Aug01         
 1144+402   B1950  A 11h44m21.020900s  40d15'14.240000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P S S       1.10
   6cm    C  P P P P       1.30
 3.7cm    X  P P P P       1.20
   2cm    U  P P P P       1.60
 0.7cm    Q  S S S S       0.85

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)
201706011.010J1146+3958
201706131.024J1146+3958
201707021.011J1146+3958
201708310.923J1146+3958
201709090.933J1146+3958
201801170.946J1146+3958
201803200.863J1146+3958
201805240.984J1146+3958
201902061.085J1146+3958
201902081.084J1146+3958
201902101.086J1146+3958
201902111.089J1146+3958
201902121.105J1146+3958
201902121.116J1146+3958
201909100.052J1146+3958
201910041.320J1146+3958
201910061.344J1146+3958
201910081.343J1146+3958
201910111.345J1146+3958
202112141.172J1146+3958
202305271.135J1146+3958
S-band data (filled triangles)
201706130.942J1146+3958
201707020.944J1146+3958
201708311.020J1146+3958
201909071.595J1146+3958
201910041.606J1146+3958
C-band data (open squares)
201706051.157J1146+3958
201706131.178J1146+3958
201707021.236J1146+3958
201708311.348J1146+3958
201804271.402J1146+3958
201805031.377J1146+3958
201902161.487J1146+3958
201908131.815J1146+3958
201908301.762J1146+3958
201910061.944J1146+3958
201910061.937J1146+3958
201910081.969J1146+3958
X-band data (X-crosses)
201707021.586J1146+3958
201708311.662J1146+3958
201802131.833J1146+3958
201903141.783J1146+3958
201908201.824J1146+3958
201908232.119J1146+3958
202008191.618J1146+3958
202101171.785J1146+3958
202104042.157J1146+3958
202104102.142J1146+3958
202104202.059J1146+3958
202104212.143J1146+3958
202104232.021J1146+3958
202104242.041J1146+3958
202104242.048J1146+3958
202104262.092J1146+3958
202106221.925J1146+3958
202203051.558J1146+3958
U-band data (filled squares)
201706171.762J1146+3958
201710192.232J1146+3958
201908132.259J1146+3958
K-band data (open circles)
201706131.825J1146+3958
201707021.998J1146+3958
202109142.062J1146+3958
Q-band data (filled circles)
201706171.955J1146+3958