Hi all,
I'm trying to run FACTOR on PREFACTORed data from P23Hetdex20. This data is from the observation used for LOFAR SCHOOL 2018 (ObsID 232875) but I only use the first 20 subbands. So, after running through PREFACTOR, there is only 2 merged subbands which are the input to FACTOR. Initially, I was getting "All pixels in the image are blanked" errors in the facetselfcal step of the very first facet, so after skimming through the issues, I thought I may not have enough data for appropriately running FACTOR. But, before trying use more subbands, I tried changing some settings in the parset (I don't recall which ones unfortunately), I managed to pass that error and got into getting "vmax should be larger than vmin" errors from the same facetselfcal step. I tried to determine precisely where in the FACTOR source code the error is coming from. Apparently, from an external library (such as numpy) call inside the make_selfcal_images.py script.
I'm not astronomer, so I try to keep the settings in the parsets as close to defaults as possible. I really appreciate any help in either finding the root cause of the error or using a workaround for the time being.
Hi all,
I'm trying to run FACTOR on PREFACTORed data from P23Hetdex20. This data is from the observation used for LOFAR SCHOOL 2018 (ObsID 232875) but I only use the first 20 subbands. So, after running through PREFACTOR, there is only 2 merged subbands which are the input to FACTOR. Initially, I was getting "All pixels in the image are blanked" errors in the facetselfcal step of the very first facet, so after skimming through the issues, I thought I may not have enough data for appropriately running FACTOR. But, before trying use more subbands, I tried changing some settings in the parset (I don't recall which ones unfortunately), I managed to pass that error and got into getting "vmax should be larger than vmin" errors from the same facetselfcal step. I tried to determine precisely where in the FACTOR source code the error is coming from. Apparently, from an external library (such as numpy) call inside the make_selfcal_images.py script.
I'm not astronomer, so I try to keep the settings in the parsets as close to defaults as possible. I really appreciate any help in either finding the root cause of the error or using a workaround for the time being.