Thanks, Robin.
I was missing the step "First crop the bad regions by double clicking either side of them."
David Boyd pointed me to this and then again your instructions are crystal clear!
My processing seems to be fully working at last.
Search found 45 matches
- Thu Sep 22, 2022 6:36 pm
- Forum: Software ISIS
- Topic: Atmospheric telluric lines on ISIS
- Replies: 9
- Views: 3961
- Wed Sep 21, 2022 11:34 pm
- Forum: Software ISIS
- Topic: Atmospheric telluric lines on ISIS
- Replies: 9
- Views: 3961
Re: Atmospheric telluric lines on ISIS
I understand the procedure. I reckon it can not be done in the "profile" tab. In "calibration" tab there is a "response assistant" button. Using this seems to work pretty well. I tried and obtained this comparison between the result and the Mile's spectrum. Comparison.j...
- Wed Sep 21, 2022 10:13 pm
- Forum: Software ISIS
- Topic: Atmospheric telluric lines on ISIS
- Replies: 9
- Views: 3961
Re: Atmospheric telluric lines on ISIS
If i crop out the telluric lines area, the final spectrum will not show that area neither. Demetra does not crop it out. It just smoothes that area with a filter, i guess. I can also use a filter in ISIS but it will smooth the whole response spectrum, not just an area. With Demetra, the final spectr...
- Wed Sep 21, 2022 5:14 pm
- Forum: Software ISIS
- Topic: Atmospheric telluric lines on ISIS
- Replies: 9
- Views: 3961
Atmospheric telluric lines on ISIS
Hello. I am still fighting to fully understand how to use ISIS. I found another problem. After processing the spectrum, i get the telluric lines at the red part of the spectrum as emision lines, obviously wrong. In the next image, the blue filter, processed with ISIS shows some of those lines. On th...
- Wed Sep 14, 2022 7:08 am
- Forum: Software ISIS
- Topic: Processing a lot versus a few spectra
- Replies: 14
- Views: 5022
Re: Processing a lot versus a few spectra
Hello.
I unchecked the optimal binning and now it works perfectly even processing all the 170 spectra.
Checking optimal binning and setting a rejection office above 30 also works, but unchecking it results look better!
Thanks Robin.
I unchecked the optimal binning and now it works perfectly even processing all the 170 spectra.
Checking optimal binning and setting a rejection office above 30 also works, but unchecking it results look better!
Thanks Robin.
- Mon Sep 12, 2022 3:13 pm
- Forum: Software ISIS
- Topic: Processing a lot versus a few spectra
- Replies: 14
- Views: 5022
Re: Processing a lot versus a few spectra
Here are four raw images. https://www.dropbox.com/sh/8zsdy7i5v4k9ymn/AACdLNOWHx5cQAql8rrYPSwba?dl=0 The ones ending in 20 and 22 give good results. The ones ending in 33 and 38 are the problematic ones. I could not attach them here so i am including a link to my Dropbox where the images are for anyb...
- Mon Sep 12, 2022 12:01 pm
- Forum: Software ISIS
- Topic: Processing a lot versus a few spectra
- Replies: 14
- Views: 5022
Re: Processing a lot versus a few spectra
Thanks, Robin. Optimal binning is checked. Saturation also was checked. The images are very far from saturation. I am not using the cosmic filter. I did many tests with different levels but results are worse always in many spectra. Besides, in Astrosurf manual says, regarding the cosmic filter, &quo...
- Sun Sep 11, 2022 10:16 pm
- Forum: Software ISIS
- Topic: Processing a lot versus a few spectra
- Replies: 14
- Views: 5022
Re: Processing a lot versus a few spectra
And answering to Tom. The 2 minutes exposure was requested for the project. I was asked to expose between 2 and 5 minutes, being 2 the preferred time. The idea is to observe a flare and those normally last a few minutes. Regearding the gain, i think you are refering to a CMOS? I am using an Atik 460...
- Sun Sep 11, 2022 10:10 pm
- Forum: Software ISIS
- Topic: Processing a lot versus a few spectra
- Replies: 14
- Views: 5022
Re: Processing a lot versus a few spectra
Hello. I have checked the few extrange looking images, yes. They look fine to me. Guiding was also checked, it went well, ±1 arcsec the whole night on average. There are a few peaks of 1.5 or 2 arc sec error but none of them coincide with the times those images were taken. And the strange issue is t...
- Sat Sep 10, 2022 9:01 pm
- Forum: Software ISIS
- Topic: Processing a lot versus a few spectra
- Replies: 14
- Views: 5022
Re: Processing a lot versus a few spectra
Hello. The exposure time for each image was two minutes. Not short! Anyway, i managed to solve the problem. IWhen i observed the problem, i was using a low Rejection Coefficient of 5. When changed to a value above 25 -i tried many different values-, the process goes well. What i do not understand is...