VLA calibrator information for 0521+1638

This page summarizes the information for 0521+1638 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
 ===================================================================
 0521+166   J2000  A 05h21m09.886021s  16d38'22.051220"  Aug01  3C138  
 0518+165   B1950  A 05h18m16.514100s  16d35'26.834000"
 -----------------------------------------------------
 BAND        A B C D    FLUX(Jy)    UVMIN(kL)  UVMAX(kL)
 =====================================================
  90cm    P  S S S S      17.5 
  20cm    L  X S P P       8.47                       45
   6cm    C  X X S P       3.78                       45
 3.7cm    X  X X S S       2.52                       45
   2cm    U  X X X S       1.56                       45
 0.7cm    Q  X X ? ?       0.4

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)
201709238.3440521+166=3C138
201710068.3373C138
201710138.3080521+166=3C138
201710168.4060521+166=3C138
201710178.3840521+166=3C138
201710178.3470521+166=3C138
201710198.3330521+166=3C138
201710218.3450521+166=3C138
201710228.3840521+166=3C138
201710228.3180521+166=3C138
201710268.3290521+166=3C138
201710288.3520521+166=3C138
201710298.3240521+166=3C138
201710308.3630521+166=3C138
201710318.3380521+166=3C138
201711098.2740521+166=3C138
201711198.3970521+166=3C138
201711258.3680521+166=3C138
201712018.3830521+166=3C138
201712088.4063C138
201712148.3070521+166=3C138
201712158.3040521+166=3C138
201712188.1930521+166=3C138
201712198.2540521+166=3C138
201712198.4030521+166=3C138
201801228.2343C138
201804108.2043C138
201804198.3663C138
201804227.8470521+166=3C138
201804268.0530521+166=3C138
201809068.2773C138
201809108.2300521+166=3C138
201809208.2150521+166=3C138
201810078.3090521+166=3C138
201810078.2870521+166=3C138
201810078.2960521+166=3C138
201810088.2900521+166=3C138
201810088.2640521+166=3C138
201810088.2610521+166=3C138
201810088.2750521+166=3C138
201810118.2470521+166=3C138
201810168.3380521+166=3C138
201810168.2820521+166=3C138
201810168.3950521+166=3C138
201810198.3050521+166=3C138
201810228.3110521+166=3C138
201810228.2600521+166=3C138
201810228.3100521+166=3C138
201810228.2880521+166=3C138
201810228.2880521+166=3C138
201810248.2790521+166=3C138
201810248.2500521+166=3C138
201810258.2540521+166=3C138
201810308.2620521+166=3C138
201810308.2710521+166=3C138
201812288.1973C138
201901098.2413C138
201905047.9693C138
201905108.5773C138
201905117.9213C138
201905178.0043C138
202112078.0003C138
202112128.2743C138
202207018.0300521+166
202208178.1083C138
202210148.2143C138
202210158.1203C138
202210188.0823C138
202210188.0713C138
202210198.1053C138
202210198.2103C138
202301248.5203C138
202303047.9873C138
202303287.9903C138
202304098.0243C138
202304117.9473C138
202304167.9423C138
202304188.0343C138
202304218.0303C138
202304288.1003C138
202305058.1183C138
202305068.0893C138
202305078.0963C138
202305168.0323C138
S-band data (filled triangles)
201709185.4403C138
201709225.4383C138
201709235.4083C138
201709255.4133C138
201709265.4353C138
201709305.4383C138
201709305.4393C138
201710015.4333C138
201710015.4403C138
201710025.4393C138
201710025.4543C138
201710035.4473C138
201710065.4413C138
201710065.4523C138
201710125.4443C138
201710125.4453C138
201710285.4223C138
201710295.3273C138
201711065.3373C138
201711085.3383C138
201711095.4223C138
201711185.3993C138
201711185.4013C138
201711195.4143C138
201711195.4173C138
201711205.4153C138
201711205.4263C138
201711215.3953C138
201711215.4183C138
201711255.4453C138
201711255.4503C138
201711265.4643C138
201711265.4773C138
201711275.4693C138
201711285.4223C138
201711285.4403C138
201711295.4263C138
201711295.4443C138
201711295.3433C138
201711305.4423C138
201711305.4543C138
201712015.4433C138
201712015.4643C138
201712165.4653C138
201712175.3833C138
201712285.4093C138
201712285.4333C138
201712295.4083C138
201712295.4283C138
201712305.4033C138
201712305.4113C138
201801055.4533C138
201801055.4553C138
201801095.4453C138
201801095.4493C138
201801105.4153C138
201801105.4293C138
201801125.3883C138
201801125.4023C138
201801135.3933C138
201801135.4043C138
201801145.4073C138
201801145.4143C138
201801165.4253C138
201801165.4513C138
201802035.4703C138
201802105.4023C138
201802125.3083C138
201802155.4103C138
201802165.5473C138
201802175.4133C138
201802185.3883C138
201804105.2833C138
201811185.4683C138
201811205.4683C138
201811205.4463C138
201811265.4623C138
201811275.5273C138
201811305.4903C138
201812015.4723C138
201812075.4523C138
201812095.5103C138
201812115.4563C138
201812145.4993C138
201812235.4863C138
201812265.4383C138
202110085.4163C138
202110085.4173C138
202110105.3923C138
202110175.3933C138
202110245.2923C138
202110265.3623C138
202111025.4283C138
202111045.4473C138
202111055.4013C138
202111095.3573C138
202111115.3783C138
202111125.3923C138
202111135.2023C138
202111165.3173C138
202111175.2943C138
202111185.2653C138
202111195.3323C138
202111205.3443C138
202111215.3153C138
202111225.2943C138
202111245.4323C138
202111255.3693C138
202111275.3483C138
202111285.3503C138
202111295.3113C138
202111305.3623C138
202112015.3313C138
202112035.3593C138
202112045.4193C138
202112055.4113C138
202112065.4173C138
202112095.4093C138
202112155.4813C138
202201315.3623C138
202202035.3133C138
202202045.3153C138
202202055.3163C138
202202075.3333C138
202202085.3353C138
202202115.3753C138
202202115.3343C138
202202135.4003C138
202202155.2603C138
202202185.3653C138
C-band data (open squares)
201711023.2190521+166=3C138
201712013.3600521+166=3C138
201804232.6823C138
201908092.886J0521+1638
202012213.0713C138
202102083.0213C138
202103263.5073C138
202204153.0013C138
202207012.7093C138
X-band data (X-crosses)
201908091.833J0521+1638
202005312.3000521+166
K-band data (open circles)
202208061.7490521+166