[vsnet-alert 17215] Re: [cvnet-outburst] Re: PNV J17144255-2943481: possible nova (10.7 mag) in Ophiuchus

[Josch Hambsch]

I have observed this new object remotely from Chile.


Obj1  PNV J17144255-2943481   

Reference star(s)
Star1 TYC 6824-0638

Check star(s)
Star2 GSC 6824-0399


    T (JD)    Obj1    Err    Star1  Star2  Airm   Filter    Group    SkyBri.
Expo time SnapShot LimitingMagnitude
2456759.85804  9.947  0.004  11.424 11.971  1.01   V          na       20.30
30.0      1       16.7     
2456759.85845  9.945  0.004  11.424 11.984  1.01   V          na       20.39
30.0      1       16.9     
2456759.85887  9.939  0.004  11.424 11.978  1.01   V          na       20.38
30.0      1       17.0     
2456759.85923  9.982  0.014  11.040 11.064  1.01   I          na       18.59
15.0      1        14.8     
2456759.85946  9.985  0.015  11.040 11.039  1.01   I          na       18.57
15.0      1        14.7     
2456759.85970  9.968  0.015  11.040 11.033  1.01   I          na       18.55
15.0      1        14.7     


Regards,

Josch Hambsch (HMB)


-----Original Message-----
From: vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp
[mailto:vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp] On Behalf Of
Sebastian Otero
Sent: Samstag, 12. April 2014 03:51
To: cvnet-outburst at yahoogroups.com;
vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp
Subject: [vsnet-alert 17212] Re: [cvnet-outburst] Re: PNV J17144255-2943481:
possible nova (10.7 mag) in Ophiuchus

>>> The ultraviolet source GALEX J171442.6-294345
(NUV 16.6 mag) is 2.9" from the new object:
R.A. 17h14m42.66s  Decl. -29°43'45.6"  (J2000.0) <<<


There is a blue star in DSS plates not present in CMC15.

There are 4 stars in CMC15 close to that blue one, which is at 17 14 
42.56 -29 43 45.2, that is 3" to the North of the reported position and 1.4"

W of the GALEX source

I transformed CMC15 data for the 4 stars in the new nova suspect field. It 
is a reddened field.
The 4 stars have V-Rc close to +2.5. The candidate has V-Rc 0.4-0.5.

I estimate the following magnitudes for the candidate in DSS plates:

1957.3210 17.0 B 16.65 Rc
1958.2930 17.1 B 16.65 Rc
1986.3422 16.65 Rc
1992.5517 16.65 Rc

The USNO-A2.0 positions are not coincident with the CMC15 positions so it is

dificcult to make cross-IDs, USNO data seem to be blended. No catalogued 
star is at the actual position of the blue star seen in DSS images.
The CMC15 positions do match the DSS images.

If this is the variable star, the amplitude is 6 mag. so it is likely a CV.

Cheers,
Sebastian

-----------------------
Sebastian Otero
VSX Team
American Association of Variable Star Observers 


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