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ATLAS discoveries of optical transients

ATel #9318; 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 4 Aug 2016; 16:09 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. (For reference MJD 57581 == 2016-07-12.)

 
Name      | ATLAS Name | RA (J2000)  | Dec (J2000) | Disc. Date | Disc Mag |   z      | Notes 
AT2016enu | ATLAS16bsz | 00:04:20.43 | +40:59:23.7 |  57581.55  |  18.05 c |          |   1. 
AT2016enx | ATLAS16bwu | 01:14:22.24 | -13:09:11.0 |  57601.56  |  18.29 c |          |   2. 
AT2016enw | ATLAS16bxb | 01:19:51.76 | -23:06:27.1 |  57601.56  |  18.80 c |          |   3. 
AT2016enz | ATLAS16bwx | 01:24:47.65 | -16:51:50.0 |  57601.58  |  19.02 c |          |   4. 
AT2016epb | ATLAS16bzd | 02:26:04.54 | -07:55:40.2 |  57602.59  |  18.68 c |          |   5. 
AT2016epa | ATLAS16bzb | 02:26:10.81 | -23:23:54.1 |  57601.59  |  17.98 c |          |   6. 
AT2016epd | ATLAS16bzh | 02:52:09.31 | -08:40:24.5 |  57601.60  |  18.09 c | 0.057236 |   7. 
AT2016epc | ATLAS16byy | 15:37:42.43 | -22:36:16.3 |  57601.27  |  16.98 c |          |   8. 
AT2016eny | ATLAS16bwv | 16:33:08.34 | -15:33:32.4 |  57601.30  |  17.67 c | 0.027075 |   9. 
AT2016enm | ATLAS16bxt | 17:09:04.98 | -17:36:21.7 |  57601.32  |  16.88 c |          |  10. 
AT2016enl | ATLAS16bwz | 22:03:34.69 | -24:58:51.2 |  57601.46  |  18.65 c |          |  11. 
AT2016eno | ATLAS16bws | 23:25:17.78 | -18:52:42.1 |  57601.50  |  18.48 c |          |  12. 
AT2016epe | ATLAS16bzg | 23:25:31.31 | -15:16:48.0 |  57602.52  |  18.68 c |          |  13. 
AT2016enn | ATLAS16bxa | 23:28:55.08 | -08:52:01.2 |  57601.51  |  18.66 c |          |  14. 
AT2016enp | ATLAS16bwb | 23:34:25.28 | -06:34:42.3 |  57601.51  |  17.93 c |          |  15. 

1. The PS1 stack shows probable faint galaxy host.
2. NED reports that the likely host (9.42 arcsec away) is GALEXASC J011422.73-130915.9.
3. SDSS DR12 reports that the likely host (7.38 arcsec away) is J011951.77-230634.4 with photometric redshift z=0.094.
4. NED reports that the likely host (7.98 arcsec away) is 2MASX J01244727-1651560.
5.
6. NED reports that the likely host (5.10 arcsec away) is APMUKS(BJ) B022354.09-233717.9.
7. NED reports that the likely host (3.72 arcsec away) is SDSS J025209.13-084027.0 with spectroscopic redshift z=0.057236, hence mu=36.97, A_c=0.14, M_c=-19.1
8. PS1 stack shows no host.
9. NED reports that the likely host (14.8 arcsec away) is 2MFGC 13265 with spectroscopic redshift z=0.027075, hence mu=35.30, A_c=2.1 (note very large foreground extinction), M_c=-19.6.
10.
11.
12. A faint object is present in the PS1 stack.
13. NED reports that the likely host (9.36 arcsec away) is APMUKS(BJ) B232255.31-153320.3.
14. SDSS DR12 reports that the likely host (3.98 arcsec away) is SDSS J232854.94-085204.7 with photometric redshift z=0.074.
15. SDSS DR12 reports that the likely host (2.91 arcsec away) is SDSS J233425.10-063441.4 with photometric redshift z=0.081.