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<br><br><b> Ticket Information: </b>
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View this ticket online: <a href="https://help.nrao.edu/agent/#app.tickets,t:31792" 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/agent/#app.tickets,t:31792</a>
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Juhi Tiwari </td>
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Awaiting Agent
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Hi, 1. I am trying to run some basic calibration steps on the old VLA data (project: AO104). I obtained the flux density of the calibrator 3C286 (1328+307 in B1950 nomenclature) using t...
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<div>Hi,</div><div>1. I am trying to run some basic calibration steps on the old VLA data (project: AO104). </div><div>I obtained the flux density of the calibrator 3C286 (1328+307 in B1950 nomenclature) using the task SETJY. Following this, I obtained a model for the flux calibrator using the task CALRD. I then ran the task CALIB with calsource input as '1328+307'. This results in the following error:</div><div>CALIB2: Task CALIB (release of 31DEC20) begins</div><div>CALIB2: Using 19910129 . L BAND . 1 Disk= 1 Usid= 1103</div><div>CALIB2: UVGET: doing no flagging this time</div><div>CALIB2: Selecting and calibrating the data</div><div>CALIB2: Using Clean Component self-cal source model</div><div>CALIB2: SETGDS: IMAGE 1 EPOCH 2000.0 UV EPOCH 1950.0</div><div>CALIB2: USE UVFIX ON THE UV DATA OR EPOSW ON THE IMAGE</div><div>CALIB2: Purports to die of UNNATURAL causes</div><div>CALIB2: localhos 31DEC20 TST: Cpu= 0.0 Real= 0 IO= 3</div><div>AIPS 2: Resumes</div><div>How can I fix this? It is strange that when I used the same observation two months ago to generate images, I did not get this error. Any idea why this may be happening now?</div><div><br></div><div>2. The same steps mentioned above were followed to reduce VLA data (project:ALO252). This time the CALIB task gave the following error.</div><div>CALIB1: Task CALIB (release of 31DEC20) begins</div><div>CALIB1: Using 19920112 . L BAND . 1 Disk= 1 Usid= 1102</div><div>CALIB1: FQMATC: Setting FQ id number = 1</div><div>CALIB1: UVGET: doing no flagging this time</div><div>CALIB1: Selecting and calibrating the data</div><div>CALIB1: A CLEAN MODEL WAS REQESTED FOR MULTIPLE SOURCES</div><div>CALIB1: Purports to die of UNNATURAL causes</div><div>CALIB1: localhos 31DEC20 TST: Cpu= 0.0 Real= 0 IO= 5</div><div>AIPS 1: Resumes</div><div>What could be going wrong here and how can this be fixed? </div><div>Juhi</div>
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