Discovery certificate for object 2018bto
TNS Astronomical Transient Report No. 18669 [ 2018TNSTR.666....1C ]

Date Received (UTC): 2018-05-19 07:04:08
Sender: Emmanuel Conseil
Source Group: None

Emmanuel Conseil report/s the discovery of a new astronomical transient.

IAU Designation: AT 2018bto
Coordinates (J2000): RA = 00:43:42.110 (10.925458) DEC = +41:22:34.80 (41.376333)
Discovery date: 2018-05-18 04:14:29 (JD=2458256.6767245)

Potential host galaxy: M31

Remarks: Emmanuel Conseil reports the discovery of a probable nova in M31, located 00 43 42.11 +41 22 34.8 at magnitude 18.0 CV on 2018-05-18 04:17:29 UTC. The object is visible on 6 images (50s exposures) taken with Slooh robotic telescope T2 (Corrected Dall-Kirkham 17" + FLI PL16803). Image available here : https://www.flickr.com/photos/econseil/27333738587/ The object is also visible on 3 images (50s exposures) taken with the same telescope on 2018-05-19 05:00:00 UTC, at magnitude 16.6 CV. There was no minor planet at this location, nor any known variable star. Image available here : https://www.flickr.com/photos/econseil/40398119710/

Photometry

Discovery (first detection):
Discovery date: 2018-05-18 04:14:29
Flux: 18 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: 6 images taken with Slooh robotic telescope T2 (Corrected Dall-Kirkham 17" + FLI PL16803)

Last non-detection:
Last non-detection date: 2018-05-17 05:07:00
Limiting flux: 19 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Images taken with Slooh robotic telescope T2 (Corrected Dall-Kirkham 17" + FLI PL16803)

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