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Hi Jamie,

After following your steps, I get good results on bandpass calibrator.



Spectrum and lightcurve of gain calibrator also looks good.

Thanks alot.

Regards,
Jimmy

Hi Jamie, The following are the commands I used from atlod. atlod in=XXX out=YYY options=birdie,xycorr,rfiflag,noauto atfix vis=YYY out=ZZZ uvsplit vis=ZZZ select=-shadow(22.5) uvflag vis=bandpass select=ant(6) edge flagval=flag options=brief uvflag vis=flux select=ant(6) edge flagval=flag options=b...

Hi Jamie, After redoing calibration without nfbin=2, the results are similar, but the spectral shape becomes flatter in 93GHz band. The following are calibration steps in detail and spectrum of 1253-055 in 93GHz and 95GHz mfcal vis=bandpass interval=0.1 refant=2 gpcal vis=bandpass interval=0.1 refan...

Hi Jamie, I tried to do more selection when doing mfboot. Something like: mfboot vis=bandpass,flux select=source(mars),-ant(5) mode=scalar device=/XS mfboot vis=bandpass,flux select=source(mars),-ant(1)(5),-ant(2)(5) mode=scalar device=/XS or mfboot vis=bandpass,flux select=source(mars) clip=0.2 mod...

Hi Jamie,

Thank you for your reply.
Attached is the spectrum of bandpass calibrator after "mfboot"



I will try your suggestion when doing mfboot.

Thank you
Jimmy

Hello all, I got bandpass calibration problem when I was reducing 3mm data. I followed the steps in this documentation, section "bandpass and flux calibration" and got different spectral index in 93GHz band and 95Ghz band. https://www.narrabri.atnf.csiro.au/calibrators/calibrator_database_...