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Three Optical Transients From the PQ Survey

ATEL # 1155; A. Mahabal, A.J. Drake, S.G. Djorgovski, E. Glikman, C. Donalek, M.J. Graham, R. Williams (Caltech); C. Baltay, D. Rabinowitz, A. Bauer, R. Scalzo, N. Elman, J. Jerke (Yale), and the PQ Survey Team
on 26 Jul 2007; 0:44 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Ashish Mahabal (

Subjects: Optical, Request for Observations, Transients

We have detected three strong optical transient in the Palomar-Quest (PQ) survey drift scans obtained at the Palomar 48-inch Samuel Oschin Telescope on 19/20/21 July 2007 UT. The transients are unresolved, and at the following J2000 coordinates:

PQT070719:151221+123004 19Jul07 UT: 05:58:52 RA: 15:12:21.38 Dec: +12:30:04.0
PQT070721:221303-043900 21Jul07 UT: 08:21:22 RA: 22:13:03.91 Dec: -04:39:00.3
PQT070721:231237-051343 21Jul07 UT: 09:20:03 RA: 23:12:37.23 Dec: -05:13:43.7

For finding charts, offsets etc., please see:

None of the three sources are present in the previous PQ images (reaching down to ~ 21 - 22 mag), the archival SDSS or DSS images, in NED, or the FIRST and NVSS radio surveys.

PQT070719:151221+123004 was present in both scans of the 19th. PQT070721:221303-043900 was present n the scans on the 19th and the 21st. PQT070721:231237-051343 is close to a galaxy and has only one scan (three images separated by ~3 minutes each). While no proper motion is seen in these images, a slow moving asteroid can not be ruled out.

All sources were detected and published as VOEvents in near-realtime at . Further observations, especially spectroscopy, are strongly encouraged.

Select PQ Transients

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R. E. Rutledge , Editor
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