Thursday, September 04, 2008

CTB-1 Supernova Remnant in Narrowband

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©2008 Richard Murray
Full Size Image

Notes: This is a supernova remnant sometimes referred to as Abell 85 located near the star Caph in the constellation Cassiopeia.

This reminds me of Simeis 147 I made an attempt at imaging a while back which is also an extremely faint remnant: here

I decided to image this using narrowband (Ha mapped to red, OIII to green, and SII to blue) filters to try to get as much detail as possible during the short amount of time I had.

CTB-1 is rarely imaged by amatuer astronomers and currently I could find only two examples on the internet. The second link refers to Dean Rowe's image which he took just recently in HaRGB and was my inspiration to give this challenging object a try:

Image of Bottom Half of CTB-1

Dean Rowe's Image

To me this object looks like a cell wall which has just burst open with its contents flowing out towards the upper left.

Coordinates: RA 23:59:13 DEC +62:26:12

Be sure to click on the image for a full size view.

Date: 8/31/08
Object: CTB-1 Supernova Remnant
Telescope: Megrez 80mm APO, WO 0.8 FR/FF
Mount: LX90
Camera: Atik 16hr
Guiding: Lx90 8" SCT, DSI Pro, Phd Guiding
Filters: Ha, OIII, SII
Exposure: 200 Minutes Ha 1x10,2x20,3x30 min subs, OIII 1x20 min sub, SII 2x20 min subs
Processing: CCDStack, Photoshop CS2
Location: Burke Ave. Observatory, Three Rivers, Michigan

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astrogalaxy said...

A very nice image.
I've not seen it before in the books I've read so far.

Rick said...

Thanks Astro.

For some reason this object has been skipped over by the amateur astronomy community even though it seems to me to be an interesting supernova remnant.


heavenabove said...


Rick said...

An imagers highest compliment! Thanks!