ATLAS discoveries of optical transients
ATel #9496; J. Tonry, L. Denneau, B. Stalder, A. Heinze, A. Sherstyuk (IfA, University of Hawaii), A. Rest (STScI), K. W. Smith, S. J. Smartt (Queen's University Belfast)
on 14 Sep 2016; 22:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ken Smith (k.w.smith@qub.ac.uk)
Subjects: Optical, Supernovae, Transient
We report the following transients found by the ATLAS survey (see Tonry et al. ATel #8680). ATLAS is a twin 0.5m telescope system on Haleakala and Mauna Loa. The first unit is operational on Haleakala is robotically surveying the sky. Two filters are used, cyan and orange (denoted c and o, all mags in AB system), more information is on http://www.fallingstar.com. All transients have been registered with the IAU.
Host galaxy identifications and redshifts are from NED or the Pan-STARRS1 3Pi image stack, and absolute magnitude calculations include an estimate of Milky Way foreground extinction at the filter wavelength.
Name | ATLAS Name | RA (J2000) | Dec (J2000) | Disc. MJD | Disc. Date | Disc Mag | z | Notes
- | ATLAS16csn | 23:56:32.55 | -31:01:23.8 | 57616.53 | 20160816.53 | 16.35 o | 0.061599 | 1.
AT2016ggg | ATLAS16csy | 01:31:57.59 | -33:38:38.8 | 57616.61 | 20160816.61 | 18.19 o | | 2.
AT2016ggd | ATLAS16csz | 01:12:32.46 | -17:27:18.2 | 57639.52 | 20160908.52 | 18.33 c | 0.044744 | 3.
- | ATLAS16ctb | 17:06:09.09 | -23:43:18.7 | 57643.26 | 20160912.26 | 16.28 o | | 4.
AT2016ggf | ATLAS16cth | 01:50:57.04 | -22:46:01.8 | 57643.55 | 20160912.55 | 18.50 o | | 5.
AT2016ggi | ATLAS16ctg | 02:04:14.84 | -08:08:28.7 | 57643.56 | 20160912.56 | 18.30 o | | 6.
AT2016ggk | ATLAS16cte | 02:23:53.42 | -33:54:31.2 | 57643.60 | 20160912.60 | 18.37 o | | 7.
1. Possible AGN. Transient coincident with 6dF J2356325-310124 with spec z=0.061599, hence mu=37.08, A_o=0.032, M_o=-20.85
2. NED reports that the likely host (1.0 arcsec away) is GALEXASC J013157.60-333837.6.
3. NED reports that the likely host (16.92 arcsec away) is ESO 541- G 025, with spectroscopic z=0.044744.: Hence mu=36.35, A_c=0.055, M_c=-18.21 (forced, using 1st 5sigma detection).
4. The object is coincident with an r=19.35 mag source in the PS1 all sky catalog, hence is probably a high amplitude stellar variable.
5. Hostless; nothing visible in the PS1 stack. NED reports UV source (17.9 arcsec away) GALEXASC J015055.79-224606.0.
6. SDSS DR12 reports that the possible (faint) host (11.4 arcsec away) is SDSS J020414.46-080818.9, with photometric redshift z=0.860.
7. Hostless.
