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CFHT-COVET discovery of Five Optical Transients

ATEL # 1579; M. M. Kasliwal (Caltech), R. Quimby (Caltech), M. H. van Kerkwijk (UToronto), S. R. Kulkarni (Caltech), D. A. Howell (UToronto)
on 15 Jun 2008; 3:56 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: Mansi Manoj Kasliwal (mansi@astro.caltech.edu)

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

Continued search by CFHT-COVET (ATEL#1552) reveals the following optical transients on UT 2008 Jun 2,3,4,5:

       Name     | RA (J2000)|DEC(J2000) |   Mag (r') on                     |   Offset   | z  |Type|   
| | | 0513, 0530, 0531, 0601, 0602, 0603| from Host |Host| |
| | | 0604, 0605, 0607, 0610, 0612 | | | |
-------------+-----------+-----------+-----------------------------------+------------+----+----+
COVET-080602A|12:30:16.45|+12:46:54.4|>22.9,>23.8, 23.5, 23.3, 23.1,>23.9|0.3"E,0.5"N |0.8 |SN? |
| | |>23.7,>23.6,>23.7,>23.3,>23.0 | | | |
COVET-080603A|12:42:35.32|+11:27:32.8|>23.4, 23.0, 23.0, 22.9, 22.8, 22.8|N.A | N.A| |
| | | 22.9, 22.2, 23.0, 23.1, 23.3 | | | |
COVET-080604A|12:27:39.71|+08:45:08.6| 22.7, 23.2, 23.2, 23.2, 23.3, 23.2|N.A. | N.A| |
| | | 23.1, 22.9, 23.2, 23.1, 23.1 | | | |
COVET-080605A|12:32:58.72|+08:18:28.6| 23.2, 23.3, 23.3, 23.1, 23.1, 23.3|0.3"W,0.05"S|0.2 |SN? |
| | | 22.9, 22.6, 22.9,>23.3,>23.4 | | | |
COVET-080612A|12:29:15.98|+13:34:57.8|>22.9,>23.7,>23.8,>23.9,>23.4,>23.8|0.1"W,0.1"S |0.25|AGN?|
| | |>23.5,>23.3,>23.5, 22.4, 21.7 | | | |

In addition to upper limits noted above, none of the above transients are detected on 080310 to a 5-sigma limiting magnitudes >23.9. The tentative classification above is based on offset from the host. All photometric redshifts (photz) and spectroscopic redshifts(specz) have been obtained from the SDSS catalog. 080603A and 080604A do not have a host in the SDSS catalog or in our prior CFHT imaging to r' > 23.9. We note that the association of 080603A with a nearby galaxy 1.3"W, 2.5"S (photo-z=0.5) is unlikely. Spectroscopic follow-up for classification is encouraged.

We thank the CFHT-QSO (Queued Service Observing) team for scheduling and performing our observations.


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R. E. Rutledge , Editor
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