[vsnet-alert 21560] Re: TCP J05074264+2447555: new transient (10.8 mag) in Taurus

[FIDRICH Robert]

APASS B-V corol index: 0.9-1.0

http://tombstone.physics.mcmaster.ca/APASS/conesearch_offset.php?radeg=76.92767&decdeg=+24.79875&raddeg=0.005

# APASS photometry for 0.005 deg radius around J2000.0 position (
76.927670, 24.798750)
55891.99248,15.0489,0.019 # B +1.41 +1.01
55976.58673,14.9959,0.017 # B +1.32 +0.84
56019.63604,14.9967,0.041 # B +1.07 +0.77
56029.61040,14.9243,0.028 # B +1.15 +1.43
55891.99195,14.1713,0.014 # V +1.38 +0.87
55976.58620,14.1494,0.013 # V +1.24 +0.73
56019.63552,14.0323,0.027 # V +1.19 +0.97
56029.60988,13.9907,0.019 # V +1.02 +1.34
55891.99507,14.5383,0.009 # g +1.20 +0.82
55976.59004,14.5587,0.008 # g +1.16 +0.98
56019.63846,14.5246,0.019 # g +0.98 +1.40
56029.61301,14.4538,0.012 # g +1.60 +1.53
55891.99329,13.8955,0.012 # r +1.00 +0.90
55976.58752,13.8349,0.010 # r +1.12 +1.11
56019.63684,13.7504,0.018 # r +1.27 +0.98
56029.61118,13.7021,0.016 # r +1.02 +0.80
55891.99460,13.4817,0.019 # i +1.82 +1.10
55976.58884,14.6537,0.041 # i +0.59 +0.86
56017.63937,13.4430,0.033 # i +2.27 +0.33
56019.63817,13.3956,0.030 # i +0.48 +0.89
56029.61249,13.3380,0.026 # i +1.49 +1.29

Clear skies,

Robert

2017-10-31 23:29 GMT+01:00 Hiroyuki Maehara <h.maehara at oao.nao.ac.jp>:

> The recent KWS data suggest that the V-Ic color index of the object is
> ~1.0 on Oct 31.723.
>
> http://kws.cetus-net.org/~maehara/VSdata.py?object=
> 050743%2B2447.9&resolver=&plot=1&obs_ys=2017&obs_ms=01&
> obs_ds=01&obs_ye=&obs_me=&obs_de=&submit=Send+query
>
> object               date(UT)       mag.     code  err.
> TCPJ05074264+2447555 20171026.75975 12.269V  KW2   0.136
> TCPJ05074264+2447555 20171026.78350 12.223V  KW2   0.130
> TCPJ05074264+2447555 20171026.78353 10.667Ic KW2   0.113
> TCPJ05074264+2447555 20171026.78384 12.126V  KW2   0.121
> TCPJ05074264+2447555 20171026.78388 10.767Ic KW2   0.126
> TCPJ05074264+2447555 20171030.72359 11.585V  KW2   0.074
> TCPJ05074264+2447555 20171030.72362 10.459Ic KW2   0.094
> TCPJ05074264+2447555 20171030.72394 11.607V  KW2   0.075
> TCPJ05074264+2447555 20171030.72398 10.320Ic KW2   0.083
> TCPJ05074264+2447555 20171030.74630 11.603V  KW2   0.075
> TCPJ05074264+2447555 20171030.74634 10.343Ic KW2   0.085
> TCPJ05074264+2447555 20171030.74664 11.585V  KW2   0.074
> TCPJ05074264+2447555 20171030.74668 10.380Ic KW2   0.087
> TCPJ05074264+2447555 20171031.72300 11.449V  KW2   0.067
> TCPJ05074264+2447555 20171031.72304 10.437Ic KW2   0.088
> TCPJ05074264+2447555 20171031.72333 11.411V  KW2   0.065
> TCPJ05074264+2447555 20171031.72337 10.366Ic KW2   0.082
> TCPJ05074264+2447555 20171031.74568 10.316Ic KW2   0.076
> TCPJ05074264+2447555 20171031.74602 10.094Ic KW2   0.063
>
> KW2:
>  f.l.=105mm lens + SBIG ST-8XME (V-band)
>  f.l.=105mm lens + SBIG STT-1603ME (Ic-band)
>
> On Tue, Oct 31, 2017 at 21:56:03, Patrick Schmeer pasc1312-aavso at yahoo.de
> via vsnet-alert wrote:
> > TCP J05074264+2447555  (CV:)
> >
> > RA 05h07m42.64s, DEC +24°47'55.5" (J2000.0)
> >
> > 2017 Sept. 2.762 UT, 13.0 mag
> > 2017 Oct. 25.688 UT, 11.7 mag
> > 2017 Oct. 31.734 UT, 10.8 mag
> > (all CCD, unfiltered)
> >
> > Discoverer: Tadashi Kojima, Gunma-ken, Japan
> >
> > 2017 10 31.734 UT
> > Discovered by T. Kojima, Gunma-ken, Japan, who found
> > this on three frames taken using Canon EOS 6D + 135-mm
> > f3.2 lens with the limiting mag.= 13.0. Star is visible
> > on 2017 Sept. 2.762 (mag.= 13.0) and on Oct. 25.688
> > (mag.= 11.7) UT. Also this star is cataloged on USNO-A2
> > as mag.= B14.7 and R13.6. An image at
> > http://www.oaa.gr.jp/~oaacs/image/TCPinTau2017.jpg
> >
> > Follow up-reports:
> > http://www.cbat.eps.harvard.edu/unconf/followups/J05074264+2447555.html
> >
> > Spectroscopy and time-resolved photometry are urgently
> > required.
> >
> > Clear skies,
> > Patrick
> >
>
>