Cas A Supernova remnant (Albert van Duin)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD240289

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Cas A Supernova remnant

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Cas A Supernova remnant

This is an optical image of the Cas-A supernova remnant in Cassiopeia, one of the strongest radio sources in the sky. Since I work at an Astronomical Radio Observatory (ASTRON) this is a source that is often mentioned as it is used as a calibration source. It also interferes with observations of faint sources in the field of view of our LOFAR radio telescope, and is subtracted from the observations.

Sky conditions were not great due to fog and cirrus in the last few weeks, a lot of gradient is the result.
But it's nice to see this object in colour. I need to redo this when the telescope is back at it's remote location.

17 x 600s R and G, 16 x 600s B and 27 x 600s L on September 28 and October 8 and 9.
I will need to make new flats to get a cleaner version...

Revison B shows the full field.

Revison C and D, new calibration files.

Original
B
C
D
Final
E

B

Description: Full field

Uploaded: ...

C

Description: Fresh calibration files helped a lot...

Uploaded: ...

D

Description: A bit lighter background

Uploaded: ...

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Status	Advanced success
Started	...
PixInsight job	W93LHTD8L33QZ6YKM9ESOK5MWU2SKK94
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h23m24s.631
RA (top/left)	23h20m59s.448
RA (top/right)	23h25m39s.436
RA (bottom/right)	23h25m51s.938
RA (bottom/left)	23h21m07s.815

Dec (center)	+58°48′59″.99
Dec (top/left)	+58°35′17″.26
Dec (top/right)	+58°33′35″.63
Dec (bottom/right)	+59°02′32″.54
Dec (bottom/left)	+59°04′15″.52

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Cas A Supernova remnant

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