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Another HADS star from the study Dave has introduced to me - new V filter in place now as well. GSC 03004-00870 in UMa.

Quite a non-descript field, and had to again go hunting for reference stars using the APASS v9 photometric catalogue - everything here is over magnitude 12... Curve looks OK - instrumental flux steadily dropped throughout the evening - suspect I might have had a little misting of mirrors, but good enough for the result. I must connect up my secondary dew heater...



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On 15/02/2019 at 10:56, coatesg said:

Another HADS star from the study Dave has introduced to me - new V filter in place now as well. GSC 03004-00870 in UMa.

Great result!

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    • By coatesg
      A run at capturing V416 UMa this evening, which is a short period HADS (~1.52hrs) - it's a faint one (mag 13.9-14.5 from my results) and I wanted to have a go at using the G filter and see what kind of exposure is required for this kind of magnitude star. (I have a Johnson V but haven't had chance to take the FW apart to install as yet and to refocus the OAG as a result)
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    • By coatesg
      Preliminary results from a 3h40m run on V799 Aur last night - this is a HADS star with period 1.83 hrs. Autofocus had a slight blip in the middle where there's an 8 min gap or so, but got the period, and the slightly odd shape nicely. AIJ complained about the red ref star - need to check saturation levels on that. These were all 7sec exposures - unflitered exposures need to be so short, even at mag 10.something to stop saturating the stars!

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