Astroart Forum

Hi, the UCAC4 is a "Catalog 1". It cannot be used with GAIA2 at the same time. "Catalogs 2" are usually on-line or slow catalogs, intended to extend "Catalogs 1". Switching from UCAC4 to GAIA2 (as Catalogs 1) is fast because both folders are remembered. Placing the UCAC4 also into the "Catalogs 2" i...

Hi, supporting two ASCOM switches is an interesting feature which will be added later this year. However three switches will not be supported. I suggest to purchase a second switch which has sufficient outputs (6+) to control all the equipment. For the moment, if automation is not required, you coul...

Hi, if it's a mobile setup, a calibration is recommended every night. If it's a fixed observatory, once per year is enough.
I suggest to start with some autoguided exposures (not in slit mode) just for testing, and compare them with exposures of 5 minutes unguided.
Fabio.

Yes, that's correct. The star could be moved with the "pulses" buttons (from the Telescope Window), or just with the actual keypad of the telescope. Once the star is 2-3 pixels near the cross, it can be automatically "captured" if you enable the RA and DEC checkboxes for autoguide. I suggest to alig...

Hi, it seems to me that the rectangle chosen is too big, it looks like 100x100 pixel, it should be 30x30 pixel instead. Doing so, when the guide window is resized, the pixels become visible and it's possible to move the star with sub-pixel precision over the slit. I suggest also to try a "normal" gu...

Hi, this usually means that there is not sufficient disk space for some temporary files, for Sigma stacking. The folder for temporary files can be set in the third page of Preprocessing. Usually it's the default TEMP folder (Users/AppData/Local/Temp), so verify that there's at least 30 Gb free in C:...

Hi, those files are included only in the full version of AA8. By the way, for the tutorial #5 you may use any 2-3 images of the same subject.
Fabio.

Hello, after switching the magnitudes in the Star Atlas, it's required to repeat the link from the Star Atlas to the Image (from the Star Atlas, button: "Reference stars - automatic" or "Reference stars - manual"). If some stars with magnitude are already in the list, it's required to reset their "P...

hello, use the command:
if the image has not a perfect 16 bit dynamic, use this to convert:

Hi, the link to download a compressed version of the gaia2 should be in the email with the other download links.
Fabio.

Hi, once a Profile is placed on the image, it can be moved and updated in real time: from the Profile Window, click the "Graph" icon (Change profile), then in the next dialog window click the "Center Y" box and use the mouse wheel to slide up/down the profile (assuming that the spectrum is horizonta...

Hello, the PDF is attached here: AA_slit_guide.pdf and https://www.astroart-forum.net/forum/viewtopic.php?f=2&t=72 more or less is still valid, (nowadays it's also possible to move the star by 0.5 and 0.1 pixels) by the way: If you don't have the possibility of making a longer exposure (or a illumin...