[vsnet-alert 17198] Re: MASTER OT J175924.12+252031.7 - PossibleNova in Hercules (12.7m)

[Christian Buil]

A quick spectrum of the transient PNV J17592412+2520317 :

http://www.astrosurf.com/buil/nova3/_pnvj17592412+2520317_20140411_009_cbuil.png

(0.28 m telescope, Alpy600 spectrograph (R=650), Castanet-Tollosan 
Observatory.

Relatively faint Halpha emission line visible. Possible nova dwarf.

Christian Buil




-----Message d'origine----- 
From: Luca Izzo
Sent: Thursday, April 10, 2014 3:43 PM
To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp
Subject: [vsnet-alert 17190] Re: MASTER OT J175924.12+252031.7 - 
PossibleNova in Hercules (12.7m)

Hi all,

I've observed the transient with the T24 iTelescope (0.65m f/6.5) + CCD 
PL09000 with KAF-09000 sensor, located at Auberry, CA.
Ensemble photometry provides a V mag. = 14.16 +- 0.15 (Astrodon V*-505 
filter).

Best,
Luca

Il giorno 10/apr/2014, alle ore 14:28, Kirill Sokolovsky ha scritto:

> I confirm the presence of the object on 2014 04 10.47553 UT at the 
> reported position using a remotely-controlled 105mm telescope 
> (iTelescope.net-T20) + unfiltered CCD SBIG STL-11000M.
>
> The object is ~13.3 mag.; position:
> 17:59:24.18 +25:20:32.5 +/-0.4" J2000
>
> The astrometric position and the unfiltered magnitude scale are calibrated 
> against UCAC3. A nearby star blended with the flaring object affects the 
> astrometry and photometry.
>
> The original wide-field FITS image is available at:
> http://scan.sai.msu.ru/~kirx/img/wcs_Calibrated-T20-ksokolovsky-master_pnv-20140409-052433-Luminance-BIN1-E-020-001.fit
>
> With best wishes,
> Kirill
>
>
> On Thu, 10 Apr 2014, Denis Denisenko wrote:
>
>> If you open SDSS image and click zoom (+) 3 times, one can suspect the
>> blue star hidden behind the brighter red dwarf at 4 o'clock (WSW)
>> direction:
>> http://skyserver.sdss3.org/dr8/en/tools/chart/chart.asp?ra=269.85084854&dec=25.34254633
>>
>> So, there may actually be three stars where SDSS is seeing two! Then
>> WZ Sge scenario becomes not so impossible as I originally thought.
>>
>> Also, keep in mind that the robotic photometry of MASTER unfiltered
>> images with the red zero point is often too bright by ~0.5m. If you
>> observe MASTER OT J175924.12+252031.7 in V band, I would expect ~13.2
>> magnitude rather than 12.7.
>>
>> Denis
>>
>> On Thu, Apr 10, 2014 at 3:11 PM, Patrick Schmeer
>> <pasc1312-aavso at yahoo.de> wrote:
>>> GALEX J175924.3+252032 (NUV 21.8 mag) is 2.7" from the new object:
>>> R.A. 17h59m24.31s  Decl. +25°20'32.5"  (J2000.0)
>>>
>>> Regards,
>>> Patrick