Search found 461 matches
- 23 Dec 2019, 13:41
- Forum: Scripts
- Topic: Camera linearity test
- Replies: 0
- Views: 5693
Camera linearity test
The linearity of a CCD camera is a common issue which is often addressed in literature. For example with the internet search: ccd linearity test astronomy you will find several papers about the matter. So, if a given CCD receives 2X light does it really outputs 2X adu ? (after having corrected the d...
- 18 Dec 2019, 11:44
- Forum: Instrumentation
- Topic: Full frame auto-focus bug
- Replies: 3
- Views: 2444
Re: Full frame auto-focus bug
Hi, did you set the special position 99999 to launch autofocus in the Sequencer?
- 13 Dec 2019, 00:50
- Forum: General
- Topic: Doubles stars whit Astroart7
- Replies: 12
- Views: 6097
Re: Doubles stars whit Astroart7
Thanks again for discovering the problem about binary stars position angles.
The Script Window can be opened from the menu: Plugin/Camera control 7.0/
There are several demo scripts to learn quickly the language. The french manual is not available though.
The Script Window can be opened from the menu: Plugin/Camera control 7.0/
There are several demo scripts to learn quickly the language. The french manual is not available though.
- 12 Dec 2019, 23:57
- Forum: General
- Topic: Doubles stars whit Astroart7
- Replies: 12
- Views: 6097
Re: Doubles stars whit Astroart7
The position angle is the trigonometric one, so measured from RA West (so it's not compatible for binary stars). To convert you need to subtract 90. Thanks for letting me know, in SP3 both angles will be shown. Meanwhile here's the script to calculate the correct P.A. for binary stars: ra1 = Image.S...
- 12 Dec 2019, 21:50
- Forum: General
- Topic: Doubles stars whit Astroart7
- Replies: 12
- Views: 6097
Re: Doubles stars whit Astroart7
To be safe on the centroid you must choose an Aperture which contains pixels only of one star. For this reason in that example I used an Aperture of 3 for the faint star and an Aperture of 5 for the bright one. The Aperture can be changed in the Preferences. The centroids are calculated with weighte...
- 12 Dec 2019, 20:19
- Forum: General
- Topic: Doubles stars whit Astroart7
- Replies: 12
- Views: 6097
Re: Doubles stars whit Astroart7
Hello, once the image is platesolved (or astrometrically calibrated) the separation and position angle can be shown by the Stars Window. Select the two stars, then right click for the context menu: double-star.png other calculations could be done by a script, here is a simple example for calculating...
- 11 Dec 2019, 18:50
- Forum: Image processing and analysis
- Topic: AStroart 7 photometry & Astrometry question
- Replies: 20
- Views: 10932
Re: AStroart 7 photometry & Astrometry question
It depends on the catalog: if the star was extremely saturated on the original plate or image then the accuracy on the position cannot be good. This is why some catalogs do not contain bright stars at all. For astrometry I wouldn't use any reference star brighter than 9.0 mag (by the way, in the Ast...
- 10 Dec 2019, 17:06
- Forum: Scripts
- Topic: Printing the value in the CCD simulator and 'V' in aperture photometry tool
- Replies: 3
- Views: 2436
Re: Printing the value in the CCD simulator and 'V' in aperture photometry tool
Hello, the star must be collected, so in the Aperture Photometry window (the Zoom window) just press ENTER with the keyboard to collect the star. Actually you could collect the star directly on the image (left click), without using the zoom window. In this case configure the Aperture/Gap/Background ...
- 09 Dec 2019, 17:52
- Forum: Image processing and analysis
- Topic: AStroart 7 photometry & Astrometry question
- Replies: 20
- Views: 10932
Re: AStroart 7 photometry & Astrometry question
About Mira, usually the precison of bright stars is not so good. For precise "DSLR" photometry, (which applies to any GRGB CCD) usually the green or red channel is used, so the image should be demosaiced with the option "Green channel" or "Red channel", see: https://www.aavso.org/dslr-observing-manu...
- 09 Dec 2019, 12:23
- Forum: Image processing and analysis
- Topic: AStroart 7 photometry & Astrometry question
- Replies: 20
- Views: 10932
Re: AStroart 7 photometry & Astrometry question
Maybe the problem is that the GSC has no stars close to very bright objects(?), but with the UCAC4 this is solved. Both the u4b and the parent folder will be accepted as valid paths for the UCAC4. I never used the Python script to fix those stars, because it's related to some stars with high proper ...
- 09 Dec 2019, 12:10
- Forum: Scripts
- Topic: Printing the value in the CCD simulator and 'V' in aperture photometry tool
- Replies: 3
- Views: 2436
Re: Printing the value in the CCD simulator and 'V' in aperture photometry tool
Hi, the commands would be: Image.GetPixel(x,y) and Image.Stars.ADU(1) (after you have selected the star) but they have been added in Astroart 6, so in Astroart 4 the only way to do that is with a Plugin. A plugin for Astroart 4 can be developed with the SDK 4.0 available at: http://www.msb-astroart....
- 02 Dec 2019, 14:12
- Forum: Instrumentation
- Topic: Canon *.cr3 raws
- Replies: 4
- Views: 2741
Re: Canon *.cr3 raws
Hello, I think that it will be presented in 3-4 months. If you like to receive a prerelease just write me by email or PM.
Greetings, Fabio.
Greetings, Fabio.