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TCP J17394608-2457555: the new transient (13.6 mag) is a Galactic nova in Ophiuchus! (updated)

SPK
Affiliation
Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Mon, 05/08/2017 - 20:37

TCP J17394608-2457555

Discoverer: Koichi Itagaki (Yamagata, Japan)

R.A. 17h39m46.08s Decl. -24°57'55.5" (J2000.0)
2017 May 8.7511 UT, 13.6 mag (CCD, unfiltered)

2017 05 08.638 UT
Discovered by K. Itagaki, Yamagata, Japan, using 0.20-m f/3.0 reflector + CCD, who confirmed this TCP with 0.50-m reflector + CCD after discovery and writes there is no recent frame.

2017 05 08.751 UT
Image at http://k-itagaki.jp/images/oph-pn.jpg

http://www.cbat.eps.harvard.edu/unconf/followups/J17394608-2457555.html

The red star (bright in the infrared) 2MASS J17394584-2457504 is 6" from the reported position of the transient.

Further designations for this red star:
USNO-B1.0 0650-0519036 (R1=17.26, B2=19.52, R2=18.15, I=14.06)
GSC2.3 S8E3029093 (F= 17.24)
WISE J173945.82-245750.0 (W1=8.260, W2=8.219, W3=8.089, W4=8.345)
VVV J173945.85-245750.33

Clear skies,
Patrick

SPK
Affiliation
Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Tue, 05/09/2017 - 17:38
Seiichiro Kiyota's follow-up report

2017 05 09.4037 UT
Photometry results were V=14.64 and Ic=11.80 with 0.61-m f/6.5 CDK astrograph + FLI PL09000 CCD camera (iTelescope.NET, T24) at Auberry, California, USA remotely. My image is available at
http://meineko.sakura.ne.jp/ccd/TCP_J17394608-2457555.jpg
It might be classical nova rather than dwarf nova as it has red color.
Seiichiro Kiyota (Kamagaya, Japan)

weo
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 05/11/2017 - 21:00
Nova in Oph - TCP J17394608-2457555

AAVSO Alert Notice 576 announces the discovery of a nova in Ophiuchus - TCP J17394608-2457555. Please see the Alert Notice for observing instructions and details. Many thanks.

Good observing,

Elizabeth Waagen, AAVSO HQ

weo
Affiliation
American Association of Variable Star Observers (AAVSO)
Fri, 05/12/2017 - 15:10
Dust production likely in TCP J17394608-2457555

V. Joshi and D. Banerjee (Physical Research Lab., Ahmedabad, India, ATel #10369) report that their spectroscopic analysis of TCP J17394608-2457555, the nova in Oph, indicates that significant dust production is likely to occur. I know that the extremely crowded region in which this nova is located makes it very difficult to observe, but observations are encouraged as the nova continues to evolve. Many thanks for your observing efforts!

Good observing,

Elizabeth Waagen, AAVSO HQ

 

weo
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 06/15/2017 - 22:01
Nova Oph 2017 photometry for Swift TOO observations

AAVSO Alert Notice 582 announces a request for observations of Nova Oph 2017 (TCP J17394608-2457555) in support of Swift TOO observations. Please see the notice for details and observing instructions.

Many thanks, and good observing,

Elizabeth Waagen, AAVSO HQ