Guider camera reflection images
Posted: Fri Dec 25, 2020 10:27 pm
Hello.
I am almost starting with LISA, so i have many doubts. Here is one.
This one is about some strange reflections that appear whenever i get a bright star in the slit as imaged by the guider. To reflections appear, one above, and one below the star.
I wonder if this is normal.
I am attaching two images, a twenty seconds long exposure with no star in the slit and another, one second long with the star Deneb in the slit. Both are jpeg images as i found the forum does not allow me to attach FITS files.
I tried with other stars but i got the same problem. I rotated the camera to try, just in case, but i found that there is no problem with the camera.
I am using the 35um wide slit and an Atik Titan camera as a guider.
Also, the telescope is a 12"Meade GPS with a focal reducer by Optec, a Next Gen 0.5x.
One more question. Is cleaning the mirror slit a good idea? What should i use for that?
Thank you for your comments.
I am almost starting with LISA, so i have many doubts. Here is one.
This one is about some strange reflections that appear whenever i get a bright star in the slit as imaged by the guider. To reflections appear, one above, and one below the star.
I wonder if this is normal.
I am attaching two images, a twenty seconds long exposure with no star in the slit and another, one second long with the star Deneb in the slit. Both are jpeg images as i found the forum does not allow me to attach FITS files.
I tried with other stars but i got the same problem. I rotated the camera to try, just in case, but i found that there is no problem with the camera.
I am using the 35um wide slit and an Atik Titan camera as a guider.
Also, the telescope is a 12"Meade GPS with a focal reducer by Optec, a Next Gen 0.5x.
One more question. Is cleaning the mirror slit a good idea? What should i use for that?
Thank you for your comments.