[vsnet-alert 17190] Re: MASTER OT J175924.12+252031.7 - Possible Nova in Hercules (12.7m)

Luca Izzo luca.izzo at gmail.com
Thu Apr 10 22:43:30 JST 2014


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


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