VLA calibrator information for 1024-0052

This page summarizes the information for 1024-0052 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)

Results from CASA pipeline flux density mining:

Observing date (UT)	Flux density (Jy/bm)	Source name used
L-band data ("VLA Y-arm" symbols)
20170610	0.823	J1024-0052
20170617	0.811	J1024-0052
20170702	0.821	J1024-0052
20170710	0.835	J1024-0052
20180409	0.804	J1024-0052
20180506	0.776	J1024-0052
20180513	0.773	J1024-0052
20180522	0.769	J1024-0052
20190917	0.775	J1024-0052
20190922	0.791	J1024-0052
20190923	0.775	J1024-0052
20191020	0.776	J1024-0052
20191020	0.781	J1024-0052
20191020	0.792	J1024-0052
S-band data (filled triangles)
20180106	0.697	J1024-0052
20180106	0.708	J1024-0052
20190416	0.690	J1024-0052
20191001	0.653	J1024-0052
20191020	0.675	J1024-0052
20191020	0.641	J1024-0052
20200912	0.712	J1024-0052
20210806	0.705	J1024-0052
20210829	0.713	J1024-0052
20210912	0.707	J1024-0052
20211029	0.721	J1024-0052
20211214	0.713	J1024-0052
C-band data (open squares)
20171113	0.514	J1024-0052
20171217	0.506	J1024-0052
20190921	0.515	J1024-0052
20191017	0.488	J1024-008
20191018	0.520	J1024-008
20191020	0.476	J1024-0052
20191020	0.507	J1024-0052
20191020	0.498	J1024-0052
20191021	0.492	J1024-008
20210611	0.492	J1024-0052
20220127	0.484	J1024-0052
20220627	0.478	J1024-0052
20220702	0.493	J1024-0052
20220702	0.479	J1024-0052
X-band data (X-crosses)
20180225	0.351	J1024-0052
20180225	0.352	J1024-0052
20191020	0.308	J1024-0052
20191020	0.337	J1024-0052
20210426	0.331	J1024-0052
20210603	0.331	J1024-0052
20221219	0.334	J1024-0052
U-band data (filled squares)
20191020	0.238	J1024-0052
20200203	0.242	J1024-0052
20200304	0.240	J1024-0052
20200317	0.241	J1024-0052
20200329	0.238	J1024-0052
20200403	0.238	J1024-0052
20200407	0.239	J1024-0052
20200408	0.238	J1024-0052
20200408	0.237	J1024-0052
20200409	0.238	J1024-0052
20200409	0.237	J1024-0052
20200410	0.236	J1024-0052
20200414	0.219	J1024-0052
20200415	0.235	J1024-0052
K-band data (open circles)
20181128	0.184	J1024-0052
20181220	0.178	J1024-0052
20181223	0.182	J1024-0052
20181224	0.181	J1024-0052
20210328	0.180	J1024-0052
20210408	0.157	J1024-0052
20210420	0.160	J1024-0052
20210423	0.155	J1024-0052
20210511	0.153	J1024-0052
20210512	0.151	J1024-0052
20210513	0.162	J1024-0052
20210513	0.154	J1024-0052
20210515	0.157	J1024-0052
20210518	0.158	J1024-0052
20210518	0.140	J1024-0052
20210519	0.153	J1024-0052
20210521	0.177	J1024-0052
20210525	0.157	J1024-0052
20210531	0.151	J1024-0052
A-band data (6-pointed stars)
20181120	0.132	J1024-0052
20181125	0.129	J1024-0052
20181204	0.133	J1024-0052
20181209	0.131	J1024-0052
20181210	0.133	J1024-0052
20181212	0.131	J1024-0052
20181212	0.129	J1024-0052
20190108	0.123	J1024-0052
20190113	0.122	J1024-0052
20190117	0.136	J1024-0052
20190119	0.129	J1024-0052
20190126	0.134	J1024-0052
20190128	0.134	J1024-0052
20190130	0.128	J1024-0052
20190131	0.130	J1024-0052
20190131	0.132	J1024-0052
20190131	0.134	J1024-0052
20200208	0.123	J1024-0052
20200208	0.123	J1024-0052
20200219	0.121	J1024-0052
20200226	0.123	J1024-0052
20200227	0.121	J1024-0052
20200229	0.118	J1024-0052
20200303	0.120	J1024-0052
20200305	0.124	J1024-0052
20200406	0.125	J1024-0052
20200416	0.132	J1024-0052
20200516	0.126	J1024-0052
20210517	0.109	J1024-0052
20210525	0.106	J1024-0052
20210526	0.117	J1024-0052
20210529	0.120	J1024-0052
20210911	0.108	J1024-0052
20220905	0.105	J1024-0052