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V2466 Cyg: probable superoutburst!

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SPK
SPK's picture
V2466 Cyg: probable superoutburst!

V2466 Cygni = Antipin V76 (= "Var76 Cyg") (UGSU:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=137613

Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data and light curve:
https://asas-sn.osu.edu/light_curves/abbc1f1b-b9c2-410e-9559-b1b8918d95a5
CYGV2466 20191125.225 <17.46g ASN
CYGV2466 20191127.229 15.68g ASN
CYGV2466 20191128.214 15.87g ASN

No previous outbursts were recorded in ASAS-SN Sky Patrol data:
https://asas-sn.osu.edu/light_curves/e6bc0663-a3c4-487b-ac14-06667ed46a3c

*** Time-resolved photometry is urgently required. ***

Clear skies,
Patrick

SPK
SPK's picture
Still bright on 2019 November 30.27 UT

https://asas-sn.osu.edu/light_curves/fc1352b5-0f07-41fa-9637-1510d2cdc2be
CYGV2466 20191130.207 16.12g ASN
CYGV2466 20191130.271 16.16g ASN

Clear skies,
Patrick

msheald
Great! Skies clear tonight.

Great! Skies clear tonight. Are there comps? My field is only about 12' x 16'.

Mike

SPK
SPK's picture
Comparison star chart

Hi Mike,

Example for a comparison star chart created using the AAVSO Variable Star Plotter (VSP):
https://www.aavso.org/apps/vsp/chart/?east=left&fov=18.5&scale=F&star=V2...

Clear skies,
Patrick

msheald
V2466 CYG Comps

Hello! Nothing in my FOV, so I'll have to pass. Best regards.

Mike

SPK
SPK's picture
Huh?

Come on, Mike,

I see several mag. 16 comparison stars within few arc minutes from the dwarf nova in this chart with 18.5' FOV.

Deconinck Michel
Deconinck Michel's picture
Strange light curve for V2466 Cyg

Really strange, looking at the 200 last days for this variable nothing was stored on the DB, LCGv1 is empty, why ?

Michel

msheald
V2466 CYG Comps

Hello! Usually, my variable uncertainties are fairly large when comps are less than 15th mag with my 8" LX200, but I can give it a try. Best regards.

Mike

SPK
SPK's picture
Re: V2466 Cyg comparison stars

Mike wrote: "Usually, my variable uncertainties are fairly large when comps are less than 15th mag ..."
How about using comparison star '151'?
https://www.aavso.org/apps/vsp/chart/?east=left&fov=6.0&scale=G&star=V24...

Bikeman
Bikeman's picture
I see it at 16.33 (V)

... will submit to the DB in a few minutes, just as a spoiler :-).

> and precise astrometry are urgently required. ***

I guess this is cut-and-paste from some initial report, but FWIW, the coordinates in the AAVSO chart are consistent with my measurements .

CS

HB

 

SPK
SPK's picture
Astrometry results

Heinz-Bernd Eggenstein (EHEA) wrote:
"... the coordinates in the AAVSO chart are consistent with my measurements."

Thanks, HB! Tonny Vanmunster (VMT) also confirmed the correctness of the VSX position.

Patrick

msheald
Comps

Hello! CV filter got me to 16.5 mag with 0.03 mag error with the 14th and 15th magnitude comps. Filtered images would likely be beyond my equipment's capability at this point, but I was excited to see CV with good error range. Best regards.

Mike 

CTX
CTX's picture
V2466 Cyg Sequence Exteneed Fainter

 

V2466 Cyg has now been extended from ~ 16.6V to ~ 19.8 V

Good Observing & Ad Astra

Tim Crawford, Sequence Team

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