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Uploaded 19-Jan-10
Taken 15-Jan-10
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Dimensions950 x 1048
Original file size323 KB
Image typeJPEG
Color spaceUncalibrated
Date taken15-Jan-10 21:00
Date modified19-Jan-10 16:55
M1 Crab Nebula

M1 Crab Nebula

Location: Dominion Astrophysical Observatory, Observatory Hill, Victoria, BC, Canada

Date: January 15, 2010 8:45PM PST

Equipment: Plaskett 1.8m, DAO

Dave Balam, telescope operator
Sensor: E2V operating at -110°C with a 2x2 bin yielding 2302x1009 pixels

Exposures: 1 each at 1 minute for r', g' & LPS
Conditions: Temperature 5°C, no dew, LVM 5.0, Transparency 4/5, Steadiness 4/5, some high haze

Processing:
Preprocessing at DAO: Flat frame applied
ImagesPlus 3.75 - r' used for Red, g' used for Green, LPS used for Blue & Luminance. Aggressive contrast stretch for R, G & B; 3 colours aligned then combined, crop.
ACDSee Pro 2.5: 2 noise streaks removed, colour depth reduction to 24 bit, save as jpg.