[evlatests] Changing Fluxes for 3C48, 3C138, 3C147

[Claire Chandler]

Hi Rick,

The defaults in CASA and the pipeline right now are Perley-Butler 2017. 
How do the new flux densities compare to those?

Claire


On 05/06/2019 04:03 PM, Rick Perley wrote:
>     The '2019 Flux Densities' observation is reduced.  The data were 
> taken Jan31/Feb 01 under ideal conditions.  Besides monitoring the 
> standard sources, emphasis was on finding southern calibrators. As 
> usual the major goal was uncovering various system issues. Come to the 
> Thursday meeting if you want to learn about these ...
>
>     The 'standard' source 3C48 is known to have undergone a major 
> flare, starting a bit more than a year ago.  The effects of this are 
> quite obvious in the results.  But I find that both 3C138 and 3C147 
> have also increased, although not by the same factor as 3C48.
>
>     All fluxes are based on 3C286.  As a check, 3C295 compared to 
> 3C286 -- no change within the errors (less than 1%, except at Q-band).
>
>     Below are the ratios of the current fluxes for 3C48, 3C138 and 
> 3C147 compared to their 'Perley-Butler' values from 2013.
>
> Note that at P-band, all ratios are 1.00 (to 1%).
>
>     Freq (MHz)    3C48    3C138    3C147
>
> -----------------------------------------------------
>
>     1022             1.00    1.00    1.00
>
>     1465            1.00    1.00    1.00
>
>     1865            1.00    0.99    1.00
>
>     2565             1.01    1.00    1.01
>
>     3565            1.01    1.00    1.01
>
>     4885            1.02    1.02    1.01
>
>     6680            1.03    1.02    1.01
>
>     8435            1.05    1.03    1.02
>
>     11320          1.08    1.05    1.03
>
>     14065          1.12    1.05    1.04
>
>     16564          1.14    1.06    1.04
>
>     19064          1.18    1.07    1.05
>
>     25564          1.25    1.08    1.06
>
>     32064          1.32    1.09    1.08
>
>     37064          1.37    1.09    1.07
>
>     42064          1.42    1.10    1.07
>
>     48064         1.42    1.11    1.03
>
> ----------------------------------------------------------
>
>     Accuracies are better than 1%, except at 48064 GHz (likely 3% or so).
>
>
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