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Outburst of NSV 1436

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FJQ
FJQ's picture
Outburst of NSV 1436

 

I observed NSV 1436 last night and it seemed brighter than the nearby comp star 129 with CCD exposure of 180 seconds with a photometric V filter.  I subsequently did a 1 hour time series with BVI filters and  wil submit this date to AASVO.

 

FJQ

 

 

 

 

 

 

 

FJQ
FJQ's picture
Here is my data for NSV 1436,

Here is my transformed BVI data for NSV 1436, for 22-25Oct15 (there was no data for 23Oct15) taken through a CDK17 telescope and ST-10XME with Astrodon BVI filters;  Note that 25Oct15's data was taken through clouds.  Most of this data comes from a time series during outburst on 24Oct15:

http://www.astroimage.info/images/NSV1436BVI%2822-25Oct15%29.jpg

James

ritzelj
NSV 1436 exposure time

James

180 sec seems to be a very long exposure time to me, I do nothing that long at all and get good results.  Are you sure you are not saturating the pixels?

John R

RIZ

FJQ
FJQ's picture
Long Explorer for NSV 1436

 

I usually do 180 secs 2x2 bin on these kind of objects in quiescent phase.  As you see in my data for 24Oct15 and afterwards, I switched to 15 sec exposing when in outburst. I only did this when I noticed the incoming 180sec frame showed it in outburst.   On some variables, I shoot both a short and long exposure to get good signal whatever the variable state is.   On systems like NSV 1436, I usually don't since they have an indefinate period.  It's very easy to pick the wrong star in the quiescent state, since NSV 1436 has a bright companion south of it.  When in outburst, the companion ' s light is superimposed on NSV 1436.

James  

p.s.  Here is a little AVI i did of NSV1436 before and after outburst: http://www.astroimage.info/images/NSV1436BVI-22-25Oct15.avi           

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