Discovery certificate for object 2012is
TNS Astronomical Transient Report No. 19072 [ 2018TNSTR.746....1S ]

Date Received (UTC): 2018-06-04 18:08:00
Sender: Ms. Lynn Seguin
Source Group: None

Lynn Seguin report/s the discovery of a new astronomical transient.

IAU Designation: AT 2012is
Coordinates (J2000): RA = 02:15:45.264 (33.9386) DEC = +00:51:38.16 (0.8606)
Discovery date: 2012-11-16 03:07:02 (JD=2456247.6298843)

Potential host galaxy: SDSS J021545.50+005135.6
Host redshift: 0.142

Remarks: Galaxy Zoo volunteer, Lynn Seguin first reported PSN to discovery/investigation team: Rich Nowell, Alex Jonkeren, CeciliaB on May 31, 2018 for analysis and investigation. A record of the discussion can be viewed here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/1267/652313?comment=1087045&page=1

Photometry

Discovery (first detection):
Discovery date: 2012-11-16 03:07:02
Flux: 19.71 ABMag
Filter: R-Cousins
Instrument: DECAM
Telescope: CTIO - 4-m Victor M. Blanco Telescope

Remarks: The R-band magnitude is calculated using APT and the reference star = SDSS J021543.35+005145.9 http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237660027202961633 DECaLS r-band ref = 19.03 https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/1267/632280?comment=1090897 The AB Magnitude setting is from DECaLS description: http://legacysurvey.org/dr1/description/

Last non-detection:
Archival info: SDSS

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2012is