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View this ticket online: <a href="https://help.nrao.edu/app#app.tickets,t:38320" title="(#)" style="color: #0065A3; font-family: Helvetica, Arial, sans-serif; font-weight: normal; padding: 0; margin: 0; text-align: left; line-height: 1.3; text-decoration: underline;">https://help.nrao.edu/app#app.tickets,t:38320</a>
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Elisabetta Ladu <elisabetta.ladu@inaf.it> </td>
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Awaiting Agent
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Redhat 7-64bit
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Dear Help-desk, I am writing because I am experiencing difficulties in running a good bandpass for my HSA spectral data where VLBA + VLA as a phased array was used. I have performed an...
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<div>Dear Help-desk, </div><div>I am writing because I am experiencing difficulties in running a good bandpass for my HSA spectral data where VLBA + VLA as a phased array was used.</div><div>I have performed an initial band pass with the BPASS task and as a calibrator 4C39.25 using the timerange in which it was observed. </div><div>(I use the aips version 31dec 2024)<br></div><div>The main parameters I set are:</div><div>CALSOUR '4C39.25' </div><div>TIMERANG 0 9 4 1 0 9 9 29</div><div>FREQID 1 </div><div>SUBARRAY 1 </div><div>ANTENNAS *all 0 </div><div>DOCALIB 1</div><div>DOBAND -1 </div><div>SOLINT 0 </div><div>SOLTYPE 'R' </div><div>REFANT 11 (VLA)</div><div>WEIGHTIT 0</div><div>BPASSPRM 1 0 0 0 0 0 0 0 1 3 0 </div><div>I then checked the results with the POSSM task and noticed that some ripples were still present. For this reason and to improve the bandpass, I thought I would try to relaunch the BPASS task using the BP table created by the first possm and then only changing </div><div>DOBAND 1 </div><div>from the parameters above </div><div>and using the BPVER 1 generated by the previous bpsass. </div><div>However, I receive the following error message from the message server: </div><div>LOCALH> BPASS1: Task BPASS (release of 31DEC24) begins</div><div>LOCALH> BPASS1: Bandpass table (amp & phase) will be normalized</div><div>LOCALH> BPASS1: Weights in solution will be channel-dependent</div><div>LOCALH> BPASS1: Array name in AN table is VLBA</div><div>LOCALH> BPASS1: Will assume this is data from the VLBA correlator</div><div>LOCALH> BPASS1: and that it is all fringe-rotated to Earth Centre</div><div>LOCALH> BPASS1: Will remove effects of that fringe-rotation</div><div>LOCALH> BPASS1: to provide consistent bandpass calibration</div><div>LOCALH> BPASS1: If incorrect, abort and change array name keyword</div><div>LOCALH> BPASS1: UVGET: Using flag table version 3 to edit data</div><div>LOCALH> BPASS1: Calibrating gains bandpass</div><div>LOCALH> BPASS1: Not calibrating polarization</div><div>LOCALH> BPASS1: Selecting, editing and calibrating the data with CL vers 5</div><div>LOCALH> BPASS1: Dividing the spectral data by channel 0</div><div>LOCALH> BPASS1: ZABORS: signal 11 received</div><div>LOCALH> BPASS1: ABORT!</div><div>I cannot trace the cause of the error.</div><div>I have also experimented with setting DOBAND 2 or 3 and WEIGHTIT 1 but always receive the same message from the message server.</div><div><br></div><div>What is the reason for the message ZABORS: signal 11 received?<br><br></div><div>I was also wondering whether it is<span style="font-size:1.125rem;"> possible and correct to execute a bpass using the previous bp table as "template"?</span></div><div><br></div><div>Thank you for your assistance.</div><div>Elisabetta</div>
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