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Gregory Walsh <gregory.walsh@nbi.ku.dk> </td>
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Awaiting Agent
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Hello, I'm reducing some Q-band data and I noticed after flux calibration that the recovered flux density for my calibrator is systematically low to Kitt Peak baselines. I've attached t...
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<div>Hello,</div><div><br></div><div>I'm reducing some Q-band data and I noticed after flux calibration that the recovered flux density for my calibrator is systematically low to Kitt Peak baselines. I've attached two outputs of UVPLT to show this: one of the entire array and one of just KP baselines. You can see by eye that the KP baselines recover systematically lower flux density than baselines at similar Gigawavelength. The post-VLBAAMP gains are also approximately half of all other antennas.</div><div><br></div><div>This data set is essentially test data, so it's not pertinent to science results exactly. Nonetheless, I'm curious to know what the general procedure is to address these low gain values to a single antenna. Is there something erroneous in the Tsys table? Would amplitude self-calibration help?</div><div><br></div><div>Thanks,</div><div>Greg</div>
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<strong>Attachments</strong>
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• <a href="https://help.nrao.edu/file.php/5924KQGSXARPXR59238416FE52DT/KP_baselines.png?access_token=skbaua-sxrhdmqito-a579b6e732285c5b41b4801983d0b73634b3a632" 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;">KP_baselines.png</a> (346.69 KB)
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• <a href="https://help.nrao.edu/file.php/5924TPTCHHMPWH5923842E83618T/All_baselines.png?access_token=skbau9-ekwyhcztcl-f8f030b6824f9bfaaf0efb8978d7b80db5b3ce1c" 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;">All_baselines.png</a> (435.04 KB)
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