Magnus L

Hi! I have some odd problems solving images containing the variable V2306 Cyg. Solveing close by works well, but images centred on this variable fails - making measurement impossible. Maybe something to do with too many stars..? There is set of uncalibrated images here: https://www.dropbox.com/scl/fo/ekce03wixepusytu0p1zq/AHWtXYZ8Wv608y0ehC8CL28?rlkey=rdck85hqu1trwaorl01aubn2y&dl=0 They are captured with a C11 at f=7.2, camera QHY268m. FOCALLEN and APTDIA seems to be correct Any help would be very...

Well..... You got a point :) For some very odd reason, the files are corrupt. Which of course explains the issue,,,, What I mean is that yes, these files are indeed 0 bytes. Also here. Why the files are corrupt is another mystery, On my end.... Magnus

Hi! I'm getting an "Access violation" error when trying to create a master flat. It works with most filters but with R I get this error. I get it on both Ubuntu Linux and Windows. Just upgraded to latest version of ASTAP but still getting the same error. The flats are here: https://www.dropbox.com/scl/fo/04ze3hyq1ypbqqbe8fqxv/h?rlkey=gh07p302fhj7cekhbruoiduqp&dl=0 Any idea what is happening? Magnus

Thanks! :) Magnus

Hi! For instance the one ending in 105_cal. My Aij says "-13,154.0557" (running ubuntu linux) Magnus

Hi! Thanks! So, there is nothing wrong with these files, right? The measurement value of zero is more an artefact of how PI handles 32 bit floating images, if I get it right. How about AstroImageJ, then? That one reports negative values. PI is really not much of an issue here for me, I just use it for measuring because it is easy :) I know that saving fits files in PI can mess things up for photometry, so I never use it for other than cosmetic pictures. Magnus

Hi! Here is a bunch of lights, calibrated lights, the master dark and the master flat used for this: https://www.dropbox.com/scl/fo/zcd0pb4ky0gjix2ygylkp/h?rlkey=gi7qfm2zkouyv0dqqxvmvccpk&dl=0 The actual values differ from what I wrote above since these are other lights, but when I measure the calibrated lights in PixInsight, the min value is zero, and in AstroImageJ, it is a negative value. Looking forward to your thoughts on this! Magnus

Hi! Can you help me understand precisly how the calibration works in ASTAP? This is my issue: I have a raw image with a min value (according to PixInsight) of 8316. My master Dark have a min value of 5175 My logic says that the calibrated image then should have a min value of 8316-5175=3141 However, the min value of the calibrated image is zero (0). Which feels odd. Roughly the same applies if I use mean values - the resulting mean is almost 2000 lower than the difference btw the means of the raw...