Discovery certificate for object 2017kdw
TNS Astronomical Transient Report No. 35317 [ 2019TNSTR.808....1T ]

Date Received (UTC): 2019-05-18 08:57:13
Sender: Mr. Richard Nowell
Source Group: None

Ine Theunissen-Limpens report/s the discovery of a new astronomical transient.

IAU Designation: AT 2017kdw
Coordinates (J2000): RA = 01:34:48.880 (23.703668) DEC = +21:25:20.14 (21.422262)
Discovery date: 2017-07-26 10:05:34 (JD=2457960.9205324)

Potential host galaxy: NGC 606
Host redshift: 0.03326

Remarks: This transient was first discussed on the Galaxy Zoo website by Ine Theunissen here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/1268/996160. Melina Thévenot also took part in the discussion.

Photometry

Discovery (first detection):
Discovery date: 2017-07-26 10:05:34
Flux: 21.73 ABMag
Filter: R-Cousins
Instrument: DECAM
Telescope: CTIO - 4-m Victor M. Blanco Telescope

Remarks: The r-band Apparent magnitude was calculated by R. Nowell using APT and reference star: SDSS J013446.32+212616.9 http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237679542435119373. An r-band Absolute magnitude of -14.15 was also calculated.

Last non-detection:
Archival info: SDSS

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