[IAUC] CBET 2411: 20100813 : APPARENT NOVAE IN M31

Vie Ago 13 19:56:59 ART 2010

                                                  Electronic Telegram No. 2411
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat en iau.org; cbatiau en eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


APPARENT NOVAE IN M31
     Kamil Hornoch, Astronomical Institute, Ondrejov; and Jesus M. Corral-
Santana and Jorge Casares, Instituto de Astrofisica de Canarias and
Universidad de La Laguna, report their discovery of a probable nova in the
galaxy M31 on co-added 720-s narrow-band H_alpha and 360-s Sloan r' CCD
frames taken by Corral-Santana and Casares with the 2.54-m Isaac Newton
Telescope (+ WFC) at La Palma on July 10.210 and 10.200 UT, respectively.
The new object, designated M31N 2010-07b, is visible on single images used
for the co-added frame and is faintly visible also on many pre-discovery
co-added frames taken during June, but it is not present on numerous archival
images taken at Ondrejov and other observatories.  M31N 2010-07b is located
at R.A. = 0h43m07s.50, Decl. = +41o17'58".6 (equinox 2000.0), which is
261" east and 110" north of the center of M31.  Available R-band magnitudes
for M31N 2010-07b, measured by Hornoch:  2005 June 11.211 UT, [22.0 (D.
Mackey, 2.54-m Isaac Newton Telescope + narrow-band H_alpha filter); Oct.
8.369, [22.9 (P. Garnavich and C. Kennedy, 1.83-m Vatican Advanced Technology
Telescope + R filter); 2010 Jan. 31.784, [21.9 (P. Kubanek, N. Morales, J. L.
Ortiz, J. Gorosabel, and M. Jelinek, 1.23-m telescope at Calar Alto + R
filter); June 4.135, R = 20.7 +/- 0.2 (Morales, Ortiz, Gorosabel, Kubanek,
and Jelinek, 1.23-m telescope at Calar Alto); 9.459, R = 20.9 +/- 0.3
(Garnavich, C. Littlefield, N. Paul, and S. Bouzid, 1.83-m Vatican Advanced
Technology Telescope); 17.152, R = 20.8 +/- 0.2 (Kubanek, Gorosabel, O. Lara
Gil, and Jelinek, 1.23-m telescope at Calar Alto); July 10.200, Sloan r' =
20.9 +/- 0.2 (Corral-Santana and Casares, 2.54-m Isaac Newton Telescope);
10.210, [H_alpha] = 18.8 +/- 0.15 (Corral-Santana and Casares); 11.210,
Sloan r' = 20.9 +/- 0.2 (Corral-Santana and Casares); 19.186, Sloan r' =
20.8 +/- 0.2 (D. Pinfield, B. Sipocz, and G. Kovacs, 2.54-m Isaac Newton
Telescope); 19.191, [H_alpha] = 18.7 +/- 0.15 (Pinfield, Sipocz, and Kovacs);
20.069, [H_alpha] = 18.8 +/- 0.15 (Gorosabel, Lara Gil, Jelinek, Kubanek, and
P. Martorell, 1.23-m telescope at Calar Alto).  When comparing measurements
in Sloan r' and H_alpha, they notice strong excess in H_alpha emission,
suggesting that the object is a nova well after the outburst.

     Hornoch also reports additional R-band photometry of recent M31 novae as
measured by himself from images taken with the 0.65-m telescope at Ondrejov.
Magnitudes for M31N 2010-05a (cf. CBETs 2305, 2319, 2341, and 2391):  July
9.035 UT, 18.6 +/- 0.15 (Hornoch and M. Wolf); 26.985, 19.2 +/- 0.2 (Hornoch);
28.051, 19.2 +/- 0.2 (Hornoch and Wolf).
     R-band magnitudes for M31N 2010-06a (cf. CBETs 2341 and 2391):  July
19.041 UT, 18.0 +/- 0.1 (Hornoch and P. Kusnirak); 20.070, 18.0 +/- 0.1
(Hornoch); 21.066, 18.0 +/- 0.1 (Kusnirak); 22.012, 17.8 +/- 0.1 (Hornoch and
P. Zasche); 26.950, 18.5 +/- 0.1 (Hornoch); 28.015, 18.3 +/- 0.1 (Hornoch and
Wolf); 28.051, 18.2 +/- 0.15 (Hornoch and Wolf); 29.044, 18.1 +/- 0.1
(Hornoch, Hornochova, and Zasche); Aug. 1.089, 18.5 +/- 0.1 (Kusnirak).
     R-band magnitudes for M31N 2010-06b (cf. CBETs 2342 and 2391):  July
19.041 UT, 19.0 +/- 0.15 (Hornoch and Kusnirak); 20.070, 18.7 +/- 0.1
(Hornoch); 21.066, 18.6 +/- 0.1 (Kusnirak); 22.012, 18.7 +/- 0.1 (Hornoch and
Zasche); 26.950, 19.4 +/- 0.15 (Hornoch); 28.015, 19.4 +/- 0.15 (Hornoch and
Wolf); 29.044, 19.6 +/- 0.15 (Hornoch, Hornochova, and Zasche); Aug. 1.089,
19.8 +/- 0.2 (Kusnirak).
     R-band magnitudes for M31N 2010-06c (cf. CBETs 2343 and 2391):  July
9.011 UT, 18.5 +/- 0.1 (Hornoch and Wolf); 14.050, 18.9 +/- 0.15 (Hornoch,
Wolf, and P. Hornochova); 15.010, 18.9 +/- 0.1 (Hornoch and Wolf); 17.062,
19.1 +/- 0.15 (Hornoch and Hornochova); 19.041, 19.3 +/- 0.15 (Hornoch and
Kusnirak); 20.070, 19.3 +/- 0.1 (Hornoch); 21.066, 19.2 +/- 0.15 (Kusnirak);
22.012, 19.3 +/- 0.15 (Hornoch and Zasche); 26.950, 19.6 +/- 0.2 (Hornoch);
28.015, 20.0 +/- 0.2 (Hornoch and Wolf); 29.044, 19.9 +/- 0.1 (Hornoch,
Hornochova, and Zasche); Aug. 1.089, 20.2 +/- 0.2 (Kusnirak).
     R-band magnitudes for M31N 2010-06d (cf. CBETs 2347 and 2391):  July
9.011 UT, 19.4 +/- 0.15 (Hornoch and Wolf); 9.035, 19.3 +/- 0.15 (Hornoch
and Wolf); 14.050, 19.3 +/- 0.25 (Hornoch, Wolf, and Hornochova); 15.010,
19.2 +/- 0.15 (Hornoch and Wolf); 17.062, 19.6 +/- 0.2 (Hornoch and
Hornochova); 19.041, 19.7 +/- 0.25 (Hornoch and Kusnirak); 20.070, 18.2
+/- 0.1 (Hornoch); 21.066, 17.7 +/- 0.1 (Kusnirak); 22.012, 17.7 +/- 0.1
(Hornoch and Zasche); 26.950, 19.0 +/- 0.15 (Hornoch); 28.015, 19.5 +/- 0.2
(Hornoch and Wolf); 28.051, 19.5 +/- 0.15 (Hornoch and Wolf); 29.044, 19.5
+/- 0.15 (Hornoch, Hornochova, and Zasche); Aug. 1.089, 19.5 +/- 0.15
(Kusnirak).
     R-band magnitudes for M31N 2010-07a (cf. CBETs 2358 and 2391):  July
19.041 UT, 17.2 +/- 0.1 (Hornoch and Kusnirak); 20.070, 17.11 +/- 0.05
(Hornoch); 21.066, 17.1 +/- 0.1 (Kusnirak); 22.012, 17.1 +/- 0.1 (Hornoch
and Zasche); 26.950, 16.9 +/- 0.1 (Hornoch); 28.015, 16.69 +/- 0.07
(Hornoch and Wolf); 28.051, 16.62 +/- 0.08 (Hornoch and Wolf); 29.044,
16.13 +/- 0.06 (Hornoch, Hornochova, and Zasche); Aug. 1.089, 16.53 +/-
0.10 (Kusnirak).


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

                         (C) Copyright 2010 CBAT
2010 August 13                   (CBET 2411)              Daniel W. E. Green