M101 in Ursa Major
Imaged from Nova Scotia, Winter/Spring 2018 with Ha data added from Spring 2023 prior to SN2023
HaLRGB Combination
Data
Altitude at culmination 80°
Minimum Airmass Value (sec z) 1.0
Mean FWHM 2.7arc-s
Taking Camera SBIG STL-11002XM
Nova Scotia Winter/Spring, 2018, Ha added from data Spring, 2023, skies ~mag 6.4 - CCD @-20C
Imaging OTA
AG Optics iDK 14.5"
Equivalent focal length and ratio
2465mm f/6.7
Mount
Astro-Physics 1600GTO
Guiding
PHD2/ONAG-XM/Lodestar X-2 Ha guided with Ultrastar
HaLRGB Total Integration Time 25 hrs 10 mins
Ha-9X30min, L 48X10min, R-27x10 min, G-25x10 min, B-24x10 min-Astrodon Gen 2 I series LRGB and 5nm Ha Filters. Binned 1X1
Acquisition
Main Sequence Software-Sequence Generator Pro
Calibration and Stacking
Darks, Flats and Bias - Stacked and calibrated with PixInsight
Reprocessed Jan 2023, Ha added Jun 2023
PixInsight, Affinity Photo v.2.03 and Bob Franke's CCDBand-Aid
All above LRGB data acquired prior to Supernova SN2023ixf. The supernova is shown below on a single 10 min Luminance sub exposure concluded at 04:36 GMT, June 21, 2023.
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