Discovery certificate for object 2017dys
TNS Astronomical Transient Report No. 11446 [ 2017TNSTR.535....1B ]

Date Received (UTC): 2017-05-09 13:27:54
Sender: Prof. Krzysztof Stanek
Source Group: ASAS-SN

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

IAU Designation: AT 2017dys
Discoverer internal name: ASASSN-17gb
Coordinates (J2000): RA = 23:05:02.059 (346.25858) DEC = -26:38:05.93 (-26.63498)
Discovery date: 2017-05-09 09:21:36 (JD=2457882.89)

Potential host galaxy: 2MASX J23050199-2638071
Host redshift: 0.029264

Remarks: In two epochs, on the rise, very close to the galaxy core, so could also be a TDE

Photometry

Discovery (first detection):
Discovery date: 2017-05-09 09:21:36
Flux: 17.4 VegaMag
Filter: V-Johnson
Instrument: Cassius
Telescope: ASASSN-Cassius

Last non-detection:
Last non-detection date: 2017-04-29 09:21:36
Limiting flux: 18 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/2017dys