Page 1 of 1
Version 6.0.3 reports lower resolutions for same Alpy data
Posted: Sun Jan 24, 2021 4:46 pm
by John Coffin
Hi, I upgraded my ISIS from version 6.0 to 6.0.3 today.
I was surprised to find that my Alpy spectrum was reported as having a resolution of 455. I reinstalled version 6.0 and processed the same data and the resolution was 527.
Then I went back and reprocessed some more data and found a similar discrepancy between the two versions.
Does anyone know why this should be?
Thanks, John
Re: Version 6.0.3 reports lower resolutions for same Alpy da
Posted: Mon Jan 25, 2021 3:57 pm
by Robin Leadbeater
I can confirm this.
I see a difference between 6.0.3 and 5.9.3 (my standard as I prefer the black body correction to the response) 5.9.3 gave R=537 and 6.0.3 gave 522 using the same data and the same xml file so the settings should have been identical
Cheers
Robin
Re: Version 6.0.3 reports lower resolutions for same Alpy da
Posted: Mon Jan 25, 2021 4:08 pm
by Robin Leadbeater
Comparing the log files I see there is a difference in the X1, X2 limits. I do not know what these are or how they are used but perhaps they have something to do with it?
- ISIS_593-603_log.png (6.33 KiB) Viewed 3528 times
Cheers
Robin
Re: Version 6.0.3 reports lower resolutions for same Alpy da
Posted: Mon Jan 25, 2021 11:26 pm
by John Coffin
Thanks Robin, I’ve emailed me to see if you can send me a copy of v 5.9.3
John
Re: Version 6.0.3 reports lower resolutions for same Alpy da
Posted: Tue Jan 26, 2021 12:33 am
by Robin Leadbeater
Hi John,
You can download previous versions of ISIS from Christian's website here
http://www.astrosurf.com/buil/isis/download/
Cheers
Robin