Discovery certificate for object 2018ddy
TNS Astronomical Transient Report No. 20016 [ 2018TNSTR.940....1S ]

Date Received (UTC): 2018-07-07 10:07:19
Sender: Prof. Krzysztof Stanek
Source Group: ASAS-SN

K. Z. Stanek, for the ASAS-SN team report/s the discovery of a new astronomical transient.

IAU Designation: SN 2018ddy
Discoverer internal name: ASASSN-18on
Coordinates (J2000): RA = 22:59:57.336 (344.9889) DEC = -45:25:53.33 (-45.43148)
Discovery date: 2018-07-07 03:36:00 (JD=2458306.65)

Potential host galaxy: GALEXASC J225957.21-452556.4

Remarks: In several epochs, unknown redshift, blue host

Photometry

Discovery (first detection):
Discovery date: 2018-07-07 03:36:00
Flux: 17.9 ABMag
Filter: g-Sloan
Instrument: Payne-Gaposchkin
Telescope: ASASSN-Payne-Gaposchkin

Last non-detection:
Last non-detection date: 2018-06-21 02:52:48
Limiting flux: 18.9 ABMag
Filter: g-Sloan
Instrument: Payne-Gaposchkin
Telescope: ASASSN-Payne-Gaposchkin


Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2018ddy