Hi,
I'm getting a weirdly elongated beam from my reduction, and a corresponding non detection.
The ra and dec for my source is: 05 16 00.4764811920 -09 48 35.394685295
I'm finding this very strange because:
(1) The weather was great (image attached)
(2) The elevation for the majority of the observation was great (image attached)
(3) There wasn't any significant outliers in the amp/phase vs time plots, or the channel vs amp plots
My reduction steps are as follows:
(1) mfcal on the bpcal with int=0.1
(2) gpcopy (1)'s sol onto the phase cal and flux cal
(3) mfcal on the flux cal with int=0.1 and options=nopassol
(4) mfcal on the phase cal with int=0.1 and options=nopassol
(5) gpboot phasecal with flux cal
(6) gpcopy (5)'s sol onto the targets
My images steps are as follows:
(1) invert with imsize=3,3,beam cell=5,5,res sup=$sup options=mfs,double
(2) clean with cutoff=5*rms
(3) restor
and cgdisp to view
Not sure what to look at from here, any suggestions would be greatly appreciated.
Cheers,
Brodie
Non detection and beam elongation issue
Moderator: Mark.Wieringa
Non detection and beam elongation issue
- Attachments
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- elevation
- Screen Shot 2019-11-26 at 1.04.05 pm.png (22.29 KiB) Viewed 7501 times
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- weather
- Screen Shot 2019-11-26 at 1.04.45 pm.png (53.5 KiB) Viewed 7501 times
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- image
- Screen Shot 2019-11-26 at 1.03.50 pm.png (87.12 KiB) Viewed 7501 times
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- ATCA Expert
- Posts: 297
- Joined: Mon Feb 08, 2010 1:37 pm
Re: Non detection and beam elongation issue
Hi Brodie,
what is the array configuration?
For East-West arrays, you would expect an elongated beam, 1/sin(dec)~6, so 6 to 1 beam axis ratio.
For Hybrid arrays it should be better.
Cheers,
Mark
what is the array configuration?
For East-West arrays, you would expect an elongated beam, 1/sin(dec)~6, so 6 to 1 beam axis ratio.
For Hybrid arrays it should be better.
Cheers,
Mark
Re: Non detection and beam elongation issue
Hi Mark,
Thanks for the reply, it was the 6A configuration.
Cheers,
Thanks for the reply, it was the 6A configuration.
Cheers,