Search found 191 matches

by fabdev
03 Jul 2020, 13:13
Forum: Instrumentation
Topic: Calibration pulses for AO in SP4
Replies: 0
Views: 29

Calibration pulses for AO in SP4

Hello, as written in the thread about the SP4 release, if you use an AO, remember to decrease in the Guide Options the duration of the calibration pulses, from 800 to 500 ms, otherwise the AO limits may be reached during the calibration itself:
by fabdev
29 Jun 2020, 13:02
Forum: General
Topic: Astroart 7.0 SP4
Replies: 8
Views: 454

Re: Astroart 7.0 SP4

The demo version of SP4 was released today:

http://www.msb-astroart.com/
by fabdev
29 Jun 2020, 13:01
Forum: General
Topic: Astroart 7.0 SP4
Replies: 8
Views: 454

Re: Astroart 7.0 SP4

instead, for some Active Optics it's recommended to decrease the calibration pulses to 500 ms, otherwise it's possible that the limits are reached during the calibration procedure.
by fabdev
24 Jun 2020, 15:03
Forum: Image processing and analysis
Topic: Images from PanSTARRS
Replies: 0
Views: 87

Images from PanSTARRS

Hello, I've just been told that it's not possible to open Panstarr images with Astroart: http://ps1images.stsci.edu/ The problem is that those images are not " Simple FITS ": they are encoded as a binary table , in compressed format. This is not supported. By the way, it's still possible to study th...
by fabdev
24 Jun 2020, 14:16
Forum: General
Topic: Astroart 7.0 SP4
Replies: 8
Views: 454

Re: Astroart 7.0 SP4

Yes, in SP4 you will see notifications in the status bar if the apparent telescope speed is lower than 0.75 pixels per second or higher than 12.0 (telescope too fast). As a general rule, If the speed is too slow, then the guide pulses will be too long and this will decrease the frame rate so the "ef...
by fabdev
22 Jun 2020, 01:52
Forum: General
Topic: Astroart 7.0 SP4
Replies: 8
Views: 454

Re: Astroart 7.0 SP4

Hello Bernd, the six dots are automatically placed on the six spikes of the Bahtinov mask (which are not present in your screenshot, see the Wikipedia link above for some examples). To view the six spikes you need a bright star. The buttons place the dots nearer or farther the star. Usually there's ...
by fabdev
22 Jun 2020, 01:42
Forum: General
Topic: gsc1.1
Replies: 4
Views: 107

Re: gsc1.1

Hello, unless you need to send precise astrometric measures, there's not need to use other catalogues. By the way the UCAC4 contains more stars and it's more precise:
viewtopic.php?f=2&t=134
by fabdev
19 Jun 2020, 11:14
Forum: General
Topic: gsc1.1
Replies: 4
Views: 107

Re: gsc1.1

Hello, nothing has changed from AA6 to AA7 about the GSC: I suggest to check the Options of the star atlas, "Catalog 1" folder, verify that it's the same in AA6 and AA7. If you have AA6 and AA7 in the same PC, open them side by side to compare the star atlas options.
Greetings, Fabio.
by fabdev
18 Jun 2020, 20:32
Forum: General
Topic: Focus a spectrum
Replies: 2
Views: 137

Re: Focus a spectrum

Hi, yes, that procedure is exact. The function is intended for reference lamps which give bright emission lines. The emission line must be vertical. The numbers are not significative, simply the higher the better. It was suggested some time ago by Ken from: http://astronomicalspectroscopy.com/ Clear...
by fabdev
10 Jun 2020, 22:17
Forum: Image processing and analysis
Topic: Precision loss during stacking when input is in integer FITS format
Replies: 2
Views: 181

Re: Precision loss during stacking when input is in integer FITS format

Hello, here is some info: In Preprocessing all the steps are performed in floating point, the roundation to integer is performed only at the end, to keep the same format of the initial images. This could be used to obtain the desired result, just open the first image of the sequence, convert it to f...