Discovery certificate for object 2018hhc
TNS Astronomical Transient Report No. 23492 [ 2018TNSTR1557....1S ]

Date Received (UTC): 2018-10-12 17:19:43
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: AT 2018hhc
Discoverer internal name: ASASSN-18xx
Coordinates (J2000): RA = 00:13:31.123 (3.37968) DEC = +40:51:37.12 (40.86031)
Discovery date: 2018-10-12 04:33:36 (JD=2458403.69)

Potential host galaxy: 4C 40.01
Host redshift: 0.2555

Remarks: Very rapid and dramatic (+2 mag) brightening of a known Seyfert 1 AGN, but it might also be an AGN-unrelated extreme luminosity transient

Photometry

Discovery (first detection):
Discovery date: 2018-10-12 04:33:36
Flux: 15.4 ABMag
Filter: g-Sloan
Instrument: Leavitt
Telescope: ASASSN-Leavitt

Last non-detection:
Last non-detection date: 2018-10-11 04:09:07
Limiting flux: 17.4 ABMag
Filter: g-Sloan
Instrument: Leavitt
Telescope: ASASSN-Leavitt


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