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PSN J01181560+1505588 = 2015ax

This Likely SN is discovered during the observation of the comet C / 2014 A4 ( SONEAR).

TOCP report :
PSN J01181560+1505588   2015 10 30.8272*  01 18 15.60 +15 05 58.8  17.2 R   12E  2N             0 0

2015 10 30.83

F. Kugel report the discovery of an apparent supernova (17.2 R) on images (limiting magnitude 18.0) obtained on October 30.83 UT with a 0.2-m SC telescope + CCD SBIG ST2000XM camera + r'filter at Banon 04, France. 
The new object is located at A.R. = 01 18 15.60, Decl. = +15 05 58.8 (equinox 2000.0, astrometry with respect to USNO-SA2 stars) which is 12 arcsec east and 2 arcsec north of the center of Galaxy 2MFGC 973. 
A confirming image was obtained on October 31.52 by A. Klotz, D. Turpin (IRAP-CNRS-OMP), D. Coward and J. Moore (UWA) using the Zadko robotic telescope (D=100cm) located at the observatory - Gingin, Australia. Magnitude 17.3 g' filter.

   SDSS_R >  

Observations :

Image of confirmation : 2015 10 31.52424                                   17.3 g'          (usno star comparaison)
2015 10 31.768020833                               17.4 r'


observer : J. Nicolas. Remotely from Banon-04, France
TEL 0.41 -m f/3.3 reflector+ CCD ST8XMENo filter

Astrométry:
UCAC4
PSN-2MFGC973 2015 10 31.84277 01 18 15.51 +15 05 57.1 17.6 R A77
Nucleus 2MFGC973 2015 10 31.84277 01 18 14.65 +15 05 55.6 17.0 R A77
2015 10 31.9587   01 18 15.53 +15 05 58.8          17.3 U









      
2015 11 01.83867 01 18 15.59 +15 05 58.5          17.3 r'      K25


2015 11 01.84880 01 18 15.50 +15 05 58.6          17.5 r'      A77





      

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The Astronomer's Telegram http://www.astronomerstelegram.org

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ATEL #8247 ATEL #8247

Title: Spectroscopic Classification of PSN J01181560+1505588 as a
Type Ia Supernova
Author: Liming Rui (Tsinghua University), Tianmeng Zhang (NAOC),
and Xiaofeng Wang (Tsinghua University)
Queries: wang_xf@mail.tsinghua.edu.cn
Posted: 5 Nov 2015; 01:48 UT
Subjects:Optical, Supernovae, Transient

We report an optical spectrum of PSN J01181560+1505588 that was obtained
on 2015 Nov.03.9 UT with the 2.16-m telescope (+BFOSC) at Xinglong Station
of NAOC. The spectrum is consistent with a type Ia supernova a few days
after the maximum light. Cross-correlation with a library of supernova
spectra using the comparison tool SNID (Blondin & Tonry 2007, ApJ,666,
1024) shows that it matches with SN 2002fk at t = + 4 days. Adopting a
redshift of 0.054 for its host galaxy, an expansion velocity of about 9300
km/s can be derived from the absorption minimum of Si II 635.5 nm.

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Password Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)
http://www.astronomerstelegram.org/?read=8247
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This is an automatically-generated notice.

2015 11 04.83610 01 18 15.57 +15 05 58.3 17.4 U A77

Central Bureau for Astronomical Telegrams
Mailing address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2015ax = PSN J01181560+1505588
Francois Kugel, Dauban, Banon, France, reports his discovery of an
apparent supernova (red mag 17.2) on CCD exposures obtained of comet C/2014
A4 by A. Klotz and himself with a 0.20-m f/4 Schmidt-Cassegrain reflector (+
Sloan r' filter) on Oct. 30.827 UT. The new object was measured to have
position R.A. = 1h18m15s.60, Decl. = +15d05'58".8 (equinox J2000.0; reference
stars from USNO-SA2.0 catalogue), which is 12" east and 2" north of the center
of the galaxy 2MFGC 973 in p.a. 78 deg. Nothing is visible at this position
on a red Digitized Sky Survey image of the galaxy. Kugel posted his image at
URL http://fkometes.pagesperso-orange.fr/images/SN_/possSN20151030.jpg.
The variable was designated PSN J01181560+1505588 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2015ax based on the
spectroscopic confirmation reported below. Additional CCD magnitudes for
2015ax: Oct. 31.524, 17.2 (Kugel; measured from an image taken by A. Klotz,
D. Turpin, D. Coward, and J. Moore with the 100-cm Zadko robotic telescope
+ "J" filter at Gingin, Australia); 31.766, 17.3 (Kugel; position end figures
15s.54, 59.5); 31.96, 17.7 (P. Dupouy and J.-B. de Vanssay, Dax, France;
0.43-m f/2.7 reflector; position end figures 15s.58, 58".5); Nov. 1.129, 17.3
(A. Maury and J.-F. Soulier; 0.4-m f/8 Ritchey-Chretien reflector at San
Pedro de Atacama, Chile; position end figures 15s.56, 58".1; image posted at
website URL http://6888comete.free.fr/images/forum/SnK1101A.jpg); 1.883, 17.5
(J. Nicolas, Dauban, France; 0.41-m f/3.3 reflector); 1.936, 17.4 (J.-F.
Soulier, Maisoncelles, France; 0.30-m f/3.8 Newtonian reflector; position end
figures 15s.57, 58".5; UCAC-4 reference stars; image posted at website URL
http://6888comete.free.fr/images/forum/SnK1101B.jpg); 2.847, 18.0 (G. Masi;
remotely using a 43-cm telescope at Ceccano, Italy; position end figures
15s.58, 58".2); 4.862, 17.5 (Nicolas).

Liming Rui and Xiaofeng Wang, Tsinghua University; and Tianmeng Zhang,
National Astronomical Observatories of China (NAOC), report on an optical
spectrogram of PSN J01181560+1505588 = SN 2015ax was obtained on Nov. 3.9 UT
with the 2.16-m telescope (+ BFOSC) at the Xinglong Station of the NAOC. The
spectrum is consistent with a type-Ia supernova a few days after maximum
light. Cross-correlation with a library of supernova spectra using the
comparison tool SNID (Blondin and Tonry 2007, Ap.J. 666, 1024) shows that
2015ax matches with SN 2002fk at +4 days. Adopting a redshift of 0.054 for
its host galaxy, FGC 146 (Haynes et al. 2011, A.J. 142, 170), an expansion
velocity of about 9300 km/s can be derived from the absorption minimum of
Si II 635.5-nm.



Check list to confirm the discovery of a supernovae Alain Klotz-28 August 2012