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star flare near ngc7635

Cleon_Wells
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Joined: 2012-01-15

I have two observation of the Bubble neb separated by 101 days showing a star flare up in the field of view of ngc7635.

Cleon

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re: star flare near ngc7635
HTY
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Joined: 2010-07-23

Cleon,

From its position, it looks like the star in question is the known Mira type star MO Cas.  It is a long period variable with a period of 252 days so the interval between your images is about right to bring it from near minimum brightness to near maximum.

I went to SIMBAD http://simbad.u-strasbg.fr/simbad/ and did a search with a 10 arcminute radius around NGC 7635 and found two mira type stars in the list that was produced.  I clicked on them and plotted the field using the Aladin applet and found that MO Cas was the likely candidate.

....Tim

Mo_Cas
Cleon_Wells
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Joined: 2012-01-15

Tim, thanks for the input, I got lucky while I was processing my latest attempt at ngc7635 with PixInsight.

The Pixinsight software ImageIntegration routine can produce Pixel Rejection maps, and this is how I realized there was something  different with the January image set. Here's a link to the PI site,

http://pixinsight.com/forum/index.php?topic=3770.msg25851#msg25851

 

Cleon, 30miles south of Chicago

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484