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Discovery of two Virgo nova candidates and three possible supernovae by CFHT-COVET

ATEL # 2056; M. M. Kasliwal (Caltech), R. Quimby (Caltech), M. H. van Kerkwijk (UToronto), S. R. Kulkarni (Caltech), D. A. Howell (LCOGT/UCSB), R. P. Breton (UToronto)
on 26 May 2009; 8:05 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Mansi Manoj Kasliwal (

Subjects: Optical, Request for Observations, AGN, Cataclysmic Variables, Nova, Supernova, Transients

Continued search by CFHT-COVET (ATEL#1936) reveals two possible novae in the Virgo Cluster and three bright supernova candidates:

   +-------------+-----------+-----------+----+--------------+---------------+   |    Name     | RA (J2000)|DEC (J2000)|Mag |Host?         |   Offset      |   |             |           |           |(r')|              | from Host     |   +-------------+-----------+-----------+----+--------------+---------------+   |COVET-090524A|12:29:03.13|+13:10:37.7|22.6|NGC4461, Virgo|1.8"E,24.0"S   |   
|COVET-090523C|12:35:37.74|+12:33:16.8|22.7|M89, Virgo |30.3"W,6.0"S |
|COVET-090520A|12:33:50.72|+12:37:18.4|19.7|z=0.0930 OR |12.4"E,2.4"S OR| | | | | |z=0.0937 |15.7"W,14.7"N |
|COVET-090523A|12:36:21.12|+12:55:18.6|21.0|phot-z = 0.1 |1.3"E,1.1"S |
|COVET-090523B|12:36:07.32|+12:58:43.4|20.3|Not in SDSS |1.4"E,1.7"N | +-------------+-----------+-----------+----+--------------+---------------+

We suggest that COVET-090524A and 090523C are nova candidates based on spatial coincidence with a Virgo member, corresponding absolute magnitude and lack of compact source in the reference. COVET-090520A is a curious supernova candidate which is in between two possible host galaxies at similar redshift. COVET-090523B is a supernova candidate with a very faint host in our reference imaging but not in SDSS. Also, COVET-090523A and 090523B are on the rise. We encourage spectroscopic confirmation and are happy to provide finding charts upon request. We thank the CFHT-QSO team for queue serviced observing.

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