Discovery certificate for object 2017keb
TNS Astronomical Transient Report No. 47477 [ 2019TNSTR1891....1B ]

Date Received (UTC): 2019-09-23 07:52:58
Sender: Mr. Richard Nowell
Source Group: None

S. Beer, C. Macmillan report/s the discovery of a new astronomical transient.

IAU Designation: AT 2017keb
Coordinates (J2000): RA = 14:36:28.347 (219.118111) DEC = +06:58:16.80 (6.971334)
Discovery date: 2017-05-20 06:26:40 (JD=2457893.7685185)

Potential host galaxy: SDSS J143628.99+065813.1
Host redshift: 0.112792

Remarks: This transient was first observed by Slvia Beer (username Bluemagi) and Christine Macmillan on the Galaxy Zoo website here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/subjects/36240129. Ine Theunissen also took part in the discussion.

Photometry

Discovery (first detection):
Discovery date: 2017-05-20 06:26:40
Flux: 21.73 ABMag
Filter: z-Sloan
Instrument: RC-Spec-4
Telescope: CTIO - 4-m Victor M. Blanco Telescope

Remarks: The z-band Apparent magnitude was calculated by Richard Nowell using APT and reference star: SDSS J143622.79+065849.6 http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237662268607103090. The z-band Absolute magnitude was also calculated as -16.75.

Last non-detection:
Archival info: SDSS

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2017keb