Skip to main content

TCP J17344775-2409042: new transient (11.8 mag) in Ophiuchus

11 posts / 0 new
Last post
SPK
SPK's picture
TCP J17344775-2409042: new transient (11.8 mag) in Ophiuchus

TCP J17344775-2409042

Discoverers: Koichi Nishiyama and Fujio Kabashima (Japan)

R.A. 17h34m47.75s Decl. -24°09'04.2" (J2000.0)
2015 Oct. 11.4129 UT, 11.8 mag (CCD, unfiltered)

http://www.cbat.eps.harvard.edu/unconf/followups/J17344775-2409042.html

Nearest candidate from the USNO-B1.0 catalog:
USNO-B1.0 0658-0470476 (17 34 47.346 -24 09 01.77)
R1= 18.88 , R2= 18.55, I= 16.44 mag

Clear skies, Patrick

ocn
ocn's picture
TCP J17344775-2409042

Hi all,

In Simbad there is a cataloged IR/2MASS source,  IRAS 17317-2407 with the (2000.0) coords listed as

17:34:48.27  -24:09:02.6.  Same object or close companion ?

 

All the best,

Steve  

 

Sebastian Otero
Sebastian Otero's picture
Nova or red variable?

Hi Steve,

That very red star (J-K= 2.28) is only 7" from the reported position and different reports give positions with errors larger than those 7" so maybe the variable is that red star.
Only new observations with better resolution will give us the answer. I will add it to VSX with the CBAT position and no cross-ID and will revise it when we know its ID for certain.

Cheers,
Sebastian

jji
TCP J17344775-2409042 New Sequence

A new sequence for TCP J17344775-2409042 has been uploaded to VSP.

 

Jim Jones

KBJ
KBJ's picture
New sequence

Is there a mistake with the 128 comp star?

And TCP J17344775-2409042 has been spectroscopically confirmed as a nova - ATEL# 8156, also by Mitsugu Fujii.

 

Cheers -

Rob Kaufman (KBJ)

jji
New Sequence

What kind of a mistake Rob.  Just looking at it I don't see a problem.

Jim Jones

 

weo
weo's picture
Alert Notice coming on Nova Oph 2015 No. 2 = TCP J17344775-24

An AAVSO Alert Notice will be posted October 14 on Nova Oph 2015 No. 2 = TCP J17344775-2409042.

Coordinates (2000.0): R.A. 17 34 47.75  Dec -24 09 04.2

It is in VSX and a sequence is available for it, so please observe this nova and report your observations to the AAVSO International Database. If you report them before 14:00 UT (noon EDT) I should be able to include them in the Alert Notice!

Good observing,

Elizabeth Waagen, AAVSO HQ

KBJ
KBJ's picture
New sequence

Hi Jim - my mistake, thought it was the brighter of the two stars (which happens to be around 11.8), just a scale issue with the chart at 1-deg field where the label sits exactly between the two stars.

 

Cheers -

Rob

jji
New Sequence

Thanks Rob.  That was a tough sequence to put together so I always a happy ending.

Jim

 

lmk
lmk's picture
Line option in vsp

[quote=KBJ]

Hi Jim - my mistake, thought it was the brighter of the two stars (which happens to be around 11.8), just a scale issue with the chart at 1-deg field where the label sits exactly between the two stars.

[/quote]

Rob, You can choose the option in VSP to put a line pointing from the label to the star, an issue which I had fought long and hard to have added, to avoid such confusion :) Thoug,h it would be even better if it was the default, rather than just an option, to avoid this issue even coming up...

Mike

SPK
SPK's picture
V2949 Oph = Nova Oph 2015 No. 2 (IAUC 9279)

V2949 Ophiuchi = Nova Ophiuchi 2015 No. 2 = TCP J17344775-2409042
(Central Bureau for Astronomical Telegrams,  Circular No. 9279)

Log in to post comments
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484