Discovery certificate for object 2018bgr
TNS Astronomical Transient Report No. 18216 [ 2018TNSTR.597....1C ]

Date Received (UTC): 2018-05-08 06:38:46
Sender: Emmanuel Conseil
Source Group: None

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

IAU Designation: AT 2018bgr
Coordinates (J2000): RA = 00:45:34.900 (11.395417) DEC = +41:57:40.40 (41.961222)
Discovery date: 2018-05-08 04:55:00 (JD=2458246.7048611)

Potential host galaxy: M31

Remarks: Emmanuel Conseil reports the discovery of a probable nova in M31, located 00 45 34.90 +41 57 40.4 at magnitude 16.6 CV. The object is visible on 6 images (60s exposures) taken with Slooh robotic telescope T1 (Corrected Dall-Kirkham 20" + FLI PL09000). The object is also visible on 3 images (50s exposures) taken with Slooh robotic telescope T2 (Corrected Dall-Kirkham 17" + FLI PL16803) The object is also visible as a faint object on 3 images (50s exposures) taken with Slooh robotic telescope T2UWF (TeleVue 85GXF Apochromatic Doublet Refractor + ST-10XME) There was no minor planet at this location, nor any known variable star. Image available here : https://www.flickr.com/photos/econseil/41968077181/

Photometry

Discovery (first detection):
Discovery date: 2018-05-08 04:55:00
Flux: 16.6 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: The object is visible on 6 images (60s exposures) taken with Slooh robotic telescope T1 (Corrected Dall-Kirkham 20" + FLI PL09000).

Last non-detection:
Last non-detection date: 2018-05-05 05:22:00
Limiting flux: 19 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: The object was not visible on 3 images (50s exposures) 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/2018bgr