Pgflag: All channels dim every 30 seconds?
Posted: Thu Aug 25, 2016 2:56 pm
See attached screen shot
Info on me: I'm a MRes student, not new to miriad but new to pgflag and data reduction
Data info: ATCA, 1420MHz (HI) of a point source (G334.72-0.65 in the screen shot but also seen in G336.49-1.48). The pattern is seen at all baselines. Only seen for observations on 2 May 2014 if that matters... near midnight.
I'm seeing some curious patterns in my data, all channels seem to dim every 30 seconds? This seems to last for the duration of a single pointing as it's not visible at all in the previous pointing... so about 4 minutes here.
I've been advised that it probably isn't a big issue, but now we're curious what might have caused this! I'm only seeing it in two of my sources on one night which were viewed one after the other, so whatever the effect is may have lasted less than 10 minutes.
Any ideas?
Info on me: I'm a MRes student, not new to miriad but new to pgflag and data reduction
Data info: ATCA, 1420MHz (HI) of a point source (G334.72-0.65 in the screen shot but also seen in G336.49-1.48). The pattern is seen at all baselines. Only seen for observations on 2 May 2014 if that matters... near midnight.
I'm seeing some curious patterns in my data, all channels seem to dim every 30 seconds? This seems to last for the duration of a single pointing as it's not visible at all in the previous pointing... so about 4 minutes here.
I've been advised that it probably isn't a big issue, but now we're curious what might have caused this! I'm only seeing it in two of my sources on one night which were viewed one after the other, so whatever the effect is may have lasted less than 10 minutes.
Any ideas?