Ian Sharp

Thanks Han!, Yes, that works fo me now - see screen shot. I use the Luminance filter a lot because I'm interested in getting the exposure down as much as possible to get the best quality eclipse curve possible for later measurement of time of minimum. I have another question but I'll start another thread. Thanks for your prompt replies. Best Regards Ian.

Hi Han, Sure here is a zip of one FIT file - let me know if you need more - I could WeTransfer them. Ian.

Thanks for your reply, I don't understand neither the variable nor the comp stars are anywhere near saturated. Here's a screen shot from AstroArt of one of the NY Vir images. Cheers Ian.

Hi, I'm a very experienced photometrist but new to photometry in ASTAP. I should say I started using ASTAP for photometry because I have just bought a Seestar and ASTAP worked very well for me with my Seestar S50 Pro files. However, I've been trying to use ASTAP on some of my regular variables that I process using AstroArt8 on a regular basis and I have had very mixed success. I always feed ASTAP with pre-calibrated files so I haven't had to go through that part of the process. For example, I tried...