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Recent Optical Transients Found by SNF/PQ: Possible Blazars and a Dwarf Nova

ATEL # 1695; S. G. Djorgovski (Caltech), P. E. Nugent (LBL), E. Glikman, A. Mahabal (Caltech), C. Baltay, D. Rabinowitz (Yale), on behalf or the LBL Nearby Supernova Factory and Palomar-Quest survey teams
on 4 Sep 2008; 2:33 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: S. George Djorgovski (george@astro.caltech.edu)

Subjects: Optical, AGN, Nova, Quasars, Transients

Further to ATel #1694, additional transients found in the PQ data by the SNF pipeline, not associated with known radio sources, but possibly previously unidentified blazars, judging by their strong variability and blue colors, include:

Name | RA(2000) | Dec(2000) | %Incr. | Comments

SNF20080823-009 | 00:14:05.664 | +25:23:51.00 | 38 | GALEX UVX QSO candidate
SNF20080816-008 | 00:20:57.384 | +33:28:20.29 | 60 | Blue stellar object in SDSS
SNF20080825-001 | 02:19:07.704 | -07:57:32.40 | 72 | APM host galaxy, outburst in August 2004
SNF20080821-001 | 02:41:48.408 | -02:50:40.92 | 49 | APM host galaxy, outburst in October 2007
SNF20080821-006 | 16:59:03.242 | +16:34:37.92 | 119 | Blue stellar object in SDSS
SNF20080816-007 | 18:17:01.351 | +53:56:11.76 | 482 | Host galaxy in DSS, outburst in July 2005
SNF20080801-012 | 20:38:38.424 | -05:50:44.52 | 130 | SDSS UVX QSO candidate
SNF20080802-004 | 20:42:58.752 | -00:33:53.28 | 16500 | Blue stellar object in SDSS, QSO? Dwarf nova?
SNF20080801-013 | 20:53:05.829 | -05:55:26.40 | 96 | SDSS UVX QSO candidate
SNF20080813-013 | 21:32:37.874 | +10:18:25.20 | 110 | Blue stellar object in SDSS
SNF20080823-003 | 21:36:26.472 | -00:45:42.12 | 116 | Blue stellar object in SDSS
SNF20080808-006 | 21:52:02.472 | -07:21:16.56 | 524 | Blue stellar object in SDSS
SNF20080827-011 | 21:54:24.217 | +09:46:28.20 | 251 | Host galaxy in DSS, outburst in July 2005
SNF20080826-001 | 22:26:18.74 | +08:14:12.9 | 161 | P200 spec., blue continuum, blazar?
SNF20080827-010 | 23:49:34.830 | -29:00:40.32 | 130 | V.faint counterpart in DSS

And also:

SNF20080822-001 | 20 38 38.67 | +06 00 07.5 | 115000 | Galactic, dwarf nova?

Spectra of SNF20080822-001 (2038+0600), and SNF20080826-001 (2226+0814) have been obtained at the Palomar 200-inch telescope using the Double Beam Spectrograph on 31 August 2008 UT, in variable conditions. The spectrum of SNF20080826-001 shows a blue continuum; we tentatively classify it as a previously unknown blazar. The spectrum of SNF20080822-001 shows strong Balmer emission lines (H alpha through delta) at ~ zero redshift (heliocentric velocity ~ -120 km/s), implying a Galactic origin; no other emission lines are detected at a significant level in our data. The Balmer lines have the estimated intrinsic velocity width FWHM ~ 1400 km/s). Indeed, Kato ( VSNET-alert 10487 ), mentions SNF20080822-001 independently stating OT_J203838.7+060008 = N080827A and that ASAS-3 may have recorded it in outburst early in August and it is probably a dwarf nova.

PQ Survey Blazars Page


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