[vsnet-alert 15513] Re: MASTER OT J212444.87+321738.3 - new very bright variable

[Kirill Sokolovsky]

Dear all,

we have pre-discovery images of MASTER OT J212444.87+321738.3 (ATel #4888) 
from the New Milky Way camera ( 135mm lens with unfiltered ST8300M CCD, 
details in http://arxiv.org/abs/1303.3268 ). The object was clearly 
detected on 2011 October 31, November 1, 3, and 4 at V=13.0, it was
not detected on images obtained in 2012 January-April.

This previous detection confirms that MASTER OT J212444.87+321738.3 is 
likely a previously unknown red variable star (Mira, SR, or L type).

With best wishes,
Kirill

###############################################
#  JD          V   V_err
2455866.262  12.94 0.03
2455866.263  12.93 0.03
2455867.256  12.93 0.04
2455867.257  13.02 0.04
2455869.213  12.91 0.05
2455869.214  13.06 0.05
2455870.228  13.02 0.05
2455870.228  13.02 0.05
2455940.146 >14.0
2455940.147 >14.0
2455947.161 >13.6
2455947.162 >12.8
2455930.151 >13.4
2455930.152 >13.4
2455967.610 >11.8
2455967.610 >11.9
2455968.610 >12.0
2455968.611 >11.9
2455968.610 >12.1
2455985.591 >12.4
2455985.590 >12.4
2455985.591 >11.9
2455961.627 >13.2
2455961.628 >13.1
2455962.621 >13.1
2455962.621 >13.2
2455963.625 >12.8
2455963.625 >12.8
2455964.613 >12.1
2455964.614 >12.1
2455998.546 >12.2
2455998.546 >12.2
2456000.551 >12.7
2456000.552 >12.7
2456003.582 >13.6
2456003.582 >13.6
2456004.561 >12.3
2456004.561 >12.3
2456005.556 >13.9
2456005.557 >13.9
2456005.558 >13.9
2456006.544 >13.8
2456006.545 >13.9
2456014.532 >13.6
2456014.532 >13.5
2455991.576 >12.9
2455991.576 >12.8
2455993.574 >12.0
2455993.574 >12.1
2455994.571 >11.8
2455994.572 >11.9
2456030.493 >13.7
2456030.493 >13.7
2456031.453 >13.6
2456031.453 >13.6
2456031.454 >13.7
2456032.462 >13.4
2456032.464 >13.6
2456032.463 >13.5
2456035.443 >13.5
2456035.444 >13.6
2456035.444 >13.6
2456038.469 >13.7
2456038.468 >13.7
2456038.470 >13.8
2456040.531 >13.6
2456040.532 >14.0
2456040.532 >13.9
2456041.432 >12.8
2456041.433 >12.8
2456041.433 >12.8
2456042.434 >13.6
2456042.435 >13.5
2456042.436 >13.5
2456043.431 >13.6
2456043.432 >13.5
2456043.432 >13.5
2456020.517 >13.3
2456020.518 >13.4
2456020.518 >13.4
2456021.510 >13.0
2456021.510 >13.1
2456021.511 >13.1
2456026.490 >12.6
2456026.491 >12.8
2456026.491 >12.8
2456026.492 >12.8
###############################################

On Fri, 15 Mar 2013, FIDRICH Robert wrote:

>>    Wouldn't it be a nova like V407 Cyg?
>
> MASTER OT J212444.87+321738.3 20110309.16 <11.0TG FID  Canon EOS1000D,
> 75mm (zoom) telephoto lens
>
> Unfortunately the area of MASTER OT J212444.87+321738.3 is a few degrees
> off my V460 Cyg images taken with 300mm focus, so I cannot provide
> fainter prediscovery data :(
>
> Maybe tommorrow night I'll be able to take images of MASTER OT
> J212444.87+321738.3. (Recently it is snowing in Hungary.)
>
> Clear skies,
>
> -- 
> Fidusz (FIDRICH Robert)
> HAA/VSS
> drotlevel:fidusz at zpok.hu
> #jabber/gtalk: fidusz at jabber.hu
>