Discovery certificate for object 2017gsu
TNS Astronomical Transient Report No. 13636 [ 2017TNSTR1003....1B ]

Date Received (UTC): 2017-09-15 18:25:07
Sender: Prof. Krzysztof Stanek
Source Group: ASAS-SN

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

IAU Designation: AT 2017gsu
Discoverer internal name: ASASSN-17mf
Coordinates (J2000): RA = 21:02:21.646 (315.59019) DEC = -54:35:23.06 (-54.58974)
Discovery date: 2017-09-12 00:43:12 (JD=2458008.53)

Potential host galaxy: ESO 187- G 047
Host redshift: 0.0434

Remarks: In two epochs, confirmed by J. Brimacombe

Photometry

Discovery (first detection):
Discovery date: 2017-09-12 00:43:12
Flux: 17.5 VegaMag
Filter: V-Johnson
Instrument: Cassius
Telescope: ASASSN-Cassius

Last non-detection:
Last non-detection date: 2017-09-07 03:36:00
Limiting flux: 17.1 VegaMag
Filter: V-Johnson
Instrument: Cassius
Telescope: ASASSN-Cassius


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