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Petar b

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About Petar b

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    Zagreb, Croatia
  1. How accurate is this site: https://astro.swarthmore.edu/print_transits.cgi?observatory_string=Specified_Lat_Long&use_utc=0&observatory_latitude=32.5413&observatory_longitude=-105&timezone=MST7MDT&start_date=today&days_to_print=28&days_in_past=0&minimum_start_elevation=+&and_vs_or=or&minimum_end_elevation=+&minimum_depth=25&target_string=&single_object=0&ra=&dec=&epoch=&period=&duration=&target=&show_ephemeris=0&print_html=1&twilight=-12&max_airmass=2.4
  2. One question do stars need to be in focus?
  3. Here is some of the information. I used the T21. Filter: V, for the clouds and the seeing I don't know I forgot to check the forecast, but it was clear if that means anything. I can't change the gain of the camera. And the image was a little bit out of focus. In the files, you will find 15sec (6 images), 30sec (5 images) and 60sec (5 images) fits files. Archive.zip
  4. It is the highest pixel value. For 30 seconds it is 6357
  5. I took some test images with the T21 and these are the averages of the star are: for 15s: 3000-4000 median value, for 30s: 5000 median value and for 60s: 7000 median value.
  6. The T5 sounds tempting because with that telescope I could maybe detect 2 transits in multiple nights because it is less expensive. Could I measure the full well depth of a star in a picture? So that I know what exposure to use. And how accurate are these predictions: https://astro.swarthmore.edu/print_transits.cgi?observatory_string=Specified_Lat_Long&use_utc=0&observatory_latitude=32.5413&observatory_longitude=-105&timezone=MST7MDT&start_date=today&days_to_print=28&days_in_past=0&minimum_start_elevation=+&and_vs_or=or&minimum_end_elevation=+&minimum_depth=25&target_string=&single_object=0&ra=&dec=&epoch=&period=&duration=&target=&show_ephemeris=0&print_html=1&twilight=-12&max_airmass=2.4
  7. That's what I thought. First I would do a 15min trail run and test what would be the best exposure. Maybe even 30min run to try capturing the beginning or the end of the transit.
  8. Technically you can but it is a little bit complicated. To see my field of view I would use this website: https://dso-browser.com/deep-sky/object/859/pleiades/m-45/bright-nebula?itelescope_mpc_code=H06&date=2018-12-01. You can change the camera angle and what telescope you are using. I've used it before and half of the time the guider wasn't working.
  9. I already paid so I have no choice but to use them. The gear I have is an 80mm ed that is currently being repaired and a DSLR (Canon EOS 700D). I think I am going to use the T21, and I will try to detect WASP-52 b.
  10. Could anyone tell me what exposure length I should use and what filter I should use when detecting an exoplanet. I was planning to take pictures with T17(http://support.itelescope.net/support/solutions/articles/231915-telescope-17) or T21 (http://support.itelescope.net/support/solutions/articles/231906-telescope-21)using the iTelescope service. And which one is better?
  11. Forgot to mention that I am using an Explore Scientific ED80(focal length is 480mm)
  12. Is it worth to buy Starlight Express SXVF-M8C used for around 210 gbp. Or should I save up for a new CCD? I currently use unmodified Canon EOS 700D.
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