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SN 2014ap in PGC 35452 - 2014 03 20

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SN 2014ap (A.R., 11 30 13.37 Dec. +24 10 07.2), scoperta il 20 marzo 2014 nella galassia pgc 35452 (offset 5E 7S), magnitudine 16.5, tipo: Ia (ATEL 6001)

SN individuata da F. Ciabattari, S. Donati, E. Mazzoni, G. Petroni and M. Rossi con il telescopio Newton da 50cm dell'Osservatorio di Monte Agliale (Lucca).

Electronic Telegram No. 3856
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
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Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2014ap IN PGC 35452 = PSN J11301337+2410072
     F. Ciabattari, S. Donati, E. Mazzoni, G. Petroni, and M. Rossi, Borgo a
Mozzano, Italy, report their discovery of an apparent supernova (mag 16.5) 
on
unfiltered CCD images (limiting magnitude 19.5) obtained on Mar. 20.89 UT 
with
a 0.5-m Newtonian telescope + FLI4710 Proline camera.  The new object is
located at R.A. = 11h30m13s.37, Decl. = +24d10'07".2 (equinox 2000.0; UCAC-2
reference stars), which is 5" east and 7" south of the center of the
galaxy
PGC 35452.  Nothing is visible at this position on their survey images from
Mar. 2012 (limiting mag 19.5) or on the digitized plates of the Palomar Sky
Survey from 1992 Apr. 27 (F plate; limiting mag 20.3) and from 1995 Apr. 22 
(J
plate; limiting mag 20.3).  The variable was designated PSN 
J11301337+2410072
when it was posted at the Central Bureau's TOCP webpage and is here 
designated
SN 2014ap based on the spectroscopic confirmation reported below. 
Additional
CCD magnitudes for 2014ap:  Mar. 22.240, 16.5 (Joseph Brimacombe, Cairns,
Australia; remotely using a 43-cm telescope at the New Mexico Skies
observatory near Mayhill, NM, U.S.A.; position end figures 13s.26, 05".9;
image posted at URL 
https://www.flickr.com/photos/43846774@N02/13376859234/);
22.828, V = 15.7 (N. James, Chelmsford, Essex, England; Celestron 11 
telescope
+ ST9XE camera; position end figures 13s.28, 06".2); 23.956, 16.0 (Gianluca
Masi, Francesca Nocentini, and Patrick Schmeer, remotely using a 43-cm
telescope near Ceccano, Italy; position end figures 13s.27, 06".3); 28.900, 
V
= 17.0 (Massimiliano Martignoni, Magnago, Italy; 0.25-m f/10 reflector;
position end figures 13s.30, 06".2).

     M. Childress, R. Scalzo, F. Yuan, B. Schmidt, Australian National
University (ANU); and B. Tucker, ANU and University of California at 
Berkeley,
report spectroscopic classification of PSN J11301337+2410072 = SN 2014ap via
a 40-min spectrogram taken on Mar. 22.6 UT with the Wide Field Spectrograph
(cf. Dopita et al. 2007, Ap. Space Sci. 310, 255) on the ANU 2.3-m telescope
at Siding Spring using the B3000/R3000 gratings (wavelength range 350-980 nm
at 0.1-nm resolution).  The spectrum indicates that 2014ap is a type-Ia
supernova around maximum light.  Classification with SNID (Blondin and Tonry
2007, Ap.J. 666, 1024) shows a good match to SN 2002er at phase -1 day, and
the preferred SNID redshift is about 0.023, consistent with the apparent 
host
galaxy (z = 0.0235; Falco et al. 1999, PASP 111, 438).  Si 635.5-nm and a
relatively weak Si 597.2-nm feature (indicating a slow decline rate) are
evident, as well as Ca H and K and the infrared triplet, the sulfur W, and
the characteristic iron complex near 500.0 nm.  Accounting for the host
redshift, they measure a Si 635.5-nm expansion velocity of 11800 km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 April 21                    (CBET 3856)              Daniel W. E. Green