VLA calibrator information for 1254+1141

This page summarizes the information for 1254+1141 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
 ===================================================================
 1254+116   J2000  A 12h54m38.255601s  11d41'05.895070"  Aug01         
 1252+119   B1950  A 12h52m07.717000s  11d57'20.865000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P P P       1.0
   6cm    C  P P P P       0.8
 3.7cm    X  S S S S       0.9
   2cm    U  S S S S       0.9
 0.7cm    Q  S S S S       0.7

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

WARNING: multiple positions found, using first one 193.6593983 +11.6849709 193.6594000 +11.6849708 Results from CASA pipeline flux density mining:
Observing date (UT)Flux density (Jy/bm)Source name used
L-band data ("VLA Y-arm" symbols)
201705220.793J1254+1141
201705251.600J1254+1141
201705310.843J1254+1141
201706010.861J1254+1141
201706010.853J1254+1141
201706070.858J1254+1141
201706090.883J1254+1141
201707090.820J1254_N4517A
201711100.749J1254+1141
201711110.748J1254+1141
201711300.759J1254+1141
201712240.765J1254+1141
201712260.775J1254+1141
201801070.714J1254+1141
201801070.708J1254+1141
201801210.702J1254+1141
201802200.797J1254+1141
201802200.809J1254+1141
201803190.745J1254+1141
201803200.756J1254+1141
201805080.771J1254+1141
201805230.787J1254+1141
201805290.763J1254+1141
201805310.755J1254+1141
201806040.755J1254+1141
201809100.788J1254+1141
201809150.822J1254+1141
201809160.811J1254+1141
201809290.817J1254+1141
201810050.793J1254+1141
201810050.810J1254+1141
201810070.802J1254+1141
201811110.880J1254+1141
201811120.875J1254+1141
201811120.869J1254+1141
201811140.856J1254+1141
201812260.808J1254+1141
201901030.803J1254+1141
201901100.804J1254+1141
201903180.758J1254+1141
201905070.775J1254+1141
201905130.752J1254+1141
201905150.788J1254+1141
201905190.766J1254+1141
201905190.771J1254+1141
201905220.769J1254+1141
201906240.722J1254+1141
201909280.722J1254+1141
201910100.771J1254+1141
201910111.098J1254+1141
201910120.738J1254+1141
201910190.748J1254+1141
202104140.800J1254+1141
202107310.820J1254+1141
202108080.822J1254+1141
202112130.868J1254+1141
202112180.844J1254+1141
202305060.886J1254+1141
202305100.904J1254+1141
S-band data (filled triangles)
201708063.344J1254+1141
201902070.843J1254+1141
201904250.798J1254+1141
201905310.731J1254+1141
201907090.802J1254+1141
201910110.820J1254+1141
202206200.910J1254+1141
C-band data (open squares)
201706150.794J1254+1141
201708040.835J1254+1141
201708050.807J1254+1141
201803260.839J1254+1141
201903100.855J1254+1141
201908290.866J1254+1141
201910100.867J1254+1141
201910110.860J1254+1141
202012110.892J1254+1141
202103030.828J1254+1141
202108070.806J1254+1141
202109280.825J1254+1141
202206090.839J1254+1141
202207020.838J1254+1141
X-band data (X-crosses)
201903100.826J1254+1141
201910100.823J1254+1141
201910110.789J1254+1141
202103020.738J1254+1141
202207230.899J1254+1141
202207240.910J1254+1141
202208040.930J1254+1141
U-band data (filled squares)
201804100.692J1254+1141
201804240.729J1254+1141
201903100.759J1254+1141
201910110.682J1254+1141
202101080.704J1254+1141
K-band data (open circles)
201804240.647J1254+1141
202101050.862J1254+1141
202101060.872J1254+1141
202101200.849J1254+1141
202102070.839J1254+1141
202102130.841J1254+1141