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Old nova V841 Oph, 10 June 2013

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#1 RobK

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Posted 09 June 2013 - 11:49 PM

A vsnet_alert has been put up on old nova V841 Oph, with an observer reporting brightening by nearly two magnitudes from its quiescent state. This nova was discovered in outburst in 1848 by J R Hind. Maximum brightness observed was 4.3.
http://ooruri.kusast...net-alert/15820
http://www.aavso.org...w/v841-ophiuchi

Co-ords are: RA 16 59 30.37, Dec -12 53 27.2 (J2000)

Confirmation is urgently sought. Cloudy here...

Cheers -

Rob

#2 RobK

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Posted 10 June 2013 - 05:00 AM

The sky cleared late I managed to image it. Appears to be around the mid mag 13s in the green channel of my RGB DSLR image, say mag 13.6. This is pretty much on the quiescent magnitude given in AAVSO's VSX catalogue. Might still be worth watching in case there actually was a 'flicker' that could be the precursor of an outburst. Or is that wishful thinking?!!

The following image has relevant AAVSO comparison stars marked. It's a 2x resize from a crop.

Cheers -

Rob

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#3 Rich (RLTYS)

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Posted 10 June 2013 - 08:00 AM

Based on your image I would agree with your mag estimate. Maybe I can image it.

Rich (RLTYS)

#4 Rich (RLTYS)

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Posted 11 June 2013 - 08:51 AM

Took an image this morning (6/11) with the SLOOH T2hm scope which seems to confirm V841's magnitude of 13.6, in green light (Tri-G).

Rich (RLTYS)

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#5 BrooksObs

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Posted 11 June 2013 - 04:54 PM

Having observed this star off and on for the past 30 years I can affirm that a magnitude of around 13.6 is absolutely normal for it in its quiescent state. I can also say that the report it had recently brightened up seems to have been the result of the combining of some faint CCD estimates with a single unconfirm visual sighting that looks to be inaccurate.

BrooksObs

#6 Rich (RLTYS)

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Posted 12 June 2013 - 06:51 AM

BrooksObs, thanks for the info.

Rich (RLTYS)






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