Serpens Main Trial 13E Flags
2012-07-31 c0924I.3E_88Serpen.13 5.3 A Comments: NODE_NOT_FOUND [2012-07-31 08:57]JMC : Astronomical passband has low signal to noise on narrow band channels, but data can be calibrated using noise source. Better yet, the 3c279 passband observations from trial 12, taken immediately before trial 13 (but accidenttally aborted), can be used. Apacity increased by 10-20% in last hour, but still reasonable for summer conditions. High gains on most 3.5m antennas, which I cannot explain and the PI needs to look into. If this is real, then most of the 3.5m antennas are essentially worthless. But for now, I am going with the quality weather grade.
* Associate this with trial 12E * Was started (not restarted) after 12E was accidentally canceled. * C20 and C21 lost if using 3c279 for bandpass calibration * C13,14,15 recovered with uvbflag * HCO+ single channel rms ~0.8/0.65/0.8 Jy/bm
* C6 had Tsys consistently higher than the rest. * I flagged calibrator and serpens data from trial 12 due to bad weather, although it would be recoverable. Shaye's flagging seem to give pretty the same rms for the continuum and the HCO+ maps. * RMS cont : 9.2/8.3/9.4 * RMSHCO+ : 0.8/0.7/0.8
select='ant(21),time(02:00:00,03:11:24)' #no coherence select='ant(20),source(3c279)' #no coherence
select="ant(6,20,21)" # no coherence and high tsys select="time(02:23:38,03:40:00) # high gains select="ant(2),time(07:48:36,07:52:35)" # high gains select="ant(5,15),time(08:14:53,08:18:49)" # high gains select="ant(16,18,19),time(07:44:33,08:41:55)" # high gains