Dear Eric<br> <br> I would like to know if DBCON is the right task to combine 2 <br> uv-datasets observed with exactly the same settings (same <br> Centre-freq, same BW, same nchan, same antenna config) <br> but pointing towards 2 different sources.<br>
<br> My goal is to use one of the sources to calibrate the other; <br> unfortunately the data for the 2 sources are in 2 different FITS <br>
files. I would also like to add that the 2 sources were observed <br> with their observation times interleaved, ie., every alternate <br> scan corresponds to the same source (the successive scans <br> were put in different FITS-files). <br>
<br> I used DBCON to combine the 2 single source files (after having <br> converted them to MULTI-source format using task MULTI) with <br> options:<br> DOARR = +1<br> DOPOS = -1<br> <br> DBCON "appears to have ended successfully" creating the output <br>
multi source file. The SU table also seem to get the correct source <br> names, except that their fluxes are all 0. <br><br> But when I now use UVPLT to plot <b>one</b> of these sources I get the <br> following error: <br>
localh> UVPLT1: Task UVPLT (release of 31DEC10) begins<br>localh> UVPLT1: SOUFIL: ALL SOURCES REJECTED BY SELECTION CRITERIA<br>localh> UVPLT1: Purports to die of UNNATURAL causes<br>localh> UVPLT1: localhost 31DEC10 TST: Cpu= 0.0 Real= 0<br>
<br> However, when I select ALL sources, UVPLT does make the plots <br> successfully -- the 2 sources can also be clearly distinguished by <br> their fluxes. <br><br><br> Could you help please? What is the right task for combining uv data <br>
on 2 different sources observed with the same correlator settings and <br> the same antenna configuration? <br><br> regards<br>
--wasim<br><br> <br clear="all"><br>-- <br>Research Fellow (A&A)<br>Raman Research Institute<br>Bangalore--560080<br>