VLA calibrator information for 1609+2641

This page summarizes the information for 1609+2641 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
 ===================================================================
 1609+266   J2000  B 16h09m13.320753s  26d41'29.036380"  Aug01         
 1607+268   B1950  B 16h07m09.290100s  26d49'18.658000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  20cm    L  P P P P       4.83
   6cm    C  S P P P       1.70                      300
 3.7cm    X  S P P P       0.85                      300
   2cm    U  X S S S       0.50                      300
 0.7cm    Q  X X X X       0.0

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)
201803194.692J1609+2641
201803214.653J1609+2641
201805244.682J1609+2641
201809074.659J1609+2641
201812064.666J1609+2641
201812164.738J1609+2641
201901194.674J1609+2641
201902154.606J1609+2641
201906054.652J1609+2641
201906094.624J1609+2641
201906104.639J1609+2641
201908155.311J1609+2641
201909014.657J1609+2641
201910034.724J1609+2641
202110134.688J1609+2641
202112224.829J1609+2641
S-band data (filled triangles)
201709252.807J1609+2641
201711242.789J1609+2641
201809072.788J1609+2641
201812062.831J1609+2641
201812162.822J1609+2641
201901192.805J1609+2641
201901272.819J1609+2641
201902152.754J1609+2641
201902192.843J1609+2641
201906092.852J1609+2641
201910032.830J1609+2641
201910052.830J1609+2641
202009042.834J1609+2641
202009172.865J1609+2641
202112222.843J1609+2641
202206192.914J1609+2641
202306272.826J1609+2641
C-band data (open squares)
201803211.408J1609+2641
201805071.372J1609+2641
201805091.372J1609+2641
201809061.371J1609+2641
201812061.354J1609+2641
201812161.390J1609+2641
201901191.367J1609+2641
201902051.352J1609+2641
201902151.379J1609+2641
201905101.314J1609+2641
201906091.365J1609+2641
201909061.395J1609+2641
201910031.454J1609+2641
202109161.377J1609+2641
202112221.376J1609+2641
202112231.426J1609+2641
202205231.376J1609+2641
202206271.307J1609+2641
X-band data (X-crosses)
201803210.776J1609+2641
201805040.727J1609+2641
201805080.735J1609+2641
201809070.738J1609+2641
201812060.742J1609+2641
201812160.756J1609+2641
201901190.753J1609+2641
201906090.732J1609+2641
201909060.760J1609+2641
201909240.747J1609+2641
201910050.724J1609+2641
201910080.722J1609+2641
202007010.718J1609+2641
202008200.769J1609+2641
202010060.727J1609+2641
202109250.646J1609+2641
202112210.750J1609+2641
202112220.746J1609+2641
202203070.730J1609+2641
U-band data (filled squares)
201811130.437J1609+2641
202112140.431J1609+2641
202112220.451J1609+2641
K-band data (open circles)
201811130.269J1609+2641
202112220.272J1609+2641
A-band data (6-pointed stars)
202112220.158J1609+2641
Q-band data (filled circles)
202112220.171J1609+2641