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Spectroscopy of Optical Transients From the PQ Survey

ATEL # 1240; S.G. Djorgovski, A.J. Drake, A. Mahabal, C. Donalek, E. Glikman, M.J. Graham, R. Williams (Caltech); C. Baltay, D. Rabinowitz, A. Bauer, R. Scalzo, N. Elman, J. Jerke (Yale); R. Thomas and P. Nugent (LBNL); J. Hennawi (UCB) and A. Myers (UIUC); A. Allan (U. Exeter), I. Steele (Liverpool JMU), and T. Brown (LCOGTN); and the PQ Survey Team
on 16 Oct 2007; 12:50 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: S. George Djorgovski (

Subjects: Optical, Request for Observations, AGN, Nova, Quasars, Supernova, Transients

We obtained low resolution spectra of the six strong optical transients in the Palomar-Quest (PQ) survey reported by Drake et al. (ATel #1234), using the Double Spectrograph at the Palomar Observatory's 200-inch Hale telescope, on the nights of 2007 Oct 10 and 11. The spectroscopic identifications are as follows:

PQT 071008:224527+103932 = SN Ia similar to SN2000cx around max, z = 0.046
PQT 071008:230627+095342 = SN Ia about 1 month past max, z ~ 0.07
PQT 071010:015849-022627 = possibly a SN Ia before the maximum
PQT 071009:024105-033814 = SN Ia similar to SN 1999aa about 9 days before max, z ~ 0.135
PQT 071011:031515-034914 = QSO, z = 1.26
PQT 071010:034520-012111 = Probable blazar, spectrum shows a featureless continuum

Supernova typing was done by R. Thomas (LBNL).

For spectra, finding charts, offsets, etc., please see:

Photometric follow-up was done using eStar telescopes ( through the VOEventNet (, and the results will be reported separately. Further observations are strongly encouraged.

Transients from the PQ Survey

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R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates