[daip] SourceID in BP tables created by BPASS
Eric Greisen
egreisen at nrao.edu
Mon May 24 13:21:23 EDT 2004
Lincoln Greenhill writes:
> I have observed that BPASS sets sourceID=0 in BP tables when
> SOLINT=0 (scan avg). Is this intentional? It seems odd.
I have looked at the code - it sets source iD = 0 when SOLINT < 0
which means to average all sources together. It does not do this when
SOLINT=0. The source number in that case could be zero I suppose when
the file is single source or otherwise has trouble with the source
table.
>
> I also have a problem with POSSM plots of BP tables that have sourceID=0
> and contain entries for two freqids. My SU table has QUAL=1 and QUAL=2 as
> a secondary way of indicating different FREQIDs (e.g.., a source w/
> freqid=1 also has qual=1). The following table describes what POSSM does
> when aparm(8)=2.
>
> FREQID QUAL Action
> 1 -1 no plots <<<<<<<< bug ?
> 2 -1 correct plots for freqid 2B
> 1 1 no plots <<<<<<<< bug ?
> 2 2 correct plots for freqid 2
> 1 2 correct plots for freqid 1 despite incorrect qual
> 2 1 correct plots for freqid 2 despite incorrect qual
>
This I find most peculiar and suggest you check the other adverbs.
The source number in the table is tested and, if zero, the usual test
on matching source numbers with those requested is skipped. The
qualifier does not get recordewd in the BP table and is ignored by
POSSM in the BP section. The FREQID is all that matters here and so
FREQID=1 should produce the same plots no matter what QUAL is set to.
Eric Greisen
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