2017-11-26
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J. Kielkopf

CDK20N
grizbV


Opened at 17:15 EST
Cooled to -5 C

49.1 F 41% H 30.15 in

Clear



Set pointing on field N of M30

Slew to M30
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First M30 exposure at 18:25  in bb 120s  m30_00042 alt 28 degrees

Have glare from Moon but it's usable and focus looks good in bb very nice in r'

120 s each

b' m30_42
g' m30_43
r' m30_44 sharp!
i' m30_45 sharp! Nice seeing in red and near IR
z' m30_46 About 3 px FWHM or less so seeing ~1.5 arcsec or better
V  m30_47 OK but a little fuzzier repeated to see if this is seeing
V  m30_48   

Processing
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Bias, scaled dark, flats from most recent archive
Added WCS for celestial coordinates


m30_iVb_rgb_sqrt.png  Color of M30 using i, V, and g filters with square root
m30_rVb_rgb_sqrt.png  Color of M30 using r, V, and g filters with square root
m30_00042_bb_dfw_sqrt.png   Full frame showing scattered moonlight


The "i" image has an artifact that may be a cosmic ray strike producing a
"starlike" bright spot that shows red in the png image.  

The png images have north up, east to the left.