Category: Candidate

AT2018ggy, Type unknown in LEDA 2817362
Discovered 2018-09-09.301 by ZTF, mag 18.73 at discovery
R.A. = 23h26m01s.300, Decl. = +38°08’46”.85

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-15.073
Approx mag 16.21CV ±0.01, ZP=29.206
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, bin 1×1

The coordinates provided by ZTF are the core of the host galaxy. The magnitude measured is that of the galaxy since nothing else is visible.

AT2018gep, Type unknown in SDSS J164348.22+410243.3
Discovered 2018-09-09.163 by Zwicky Transient Facility (ZTF), mag 20.48 at discovery
R.A. = 16h43m48s.220, Decl. = +41°02’43”.37

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-14.858
Approx mag 15.56CV ±0.00, ZP=29.003
Note: the supernove is brightening very fast: Stan Howerton saw it ag 16.10V ±0.02 on 2018-09-12.116 and 16.14V ±0.04 on 2018-09-13.138.
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, bin 1×1

AT2018gen, Type unknown
Discovered 2018-09-10.441 by ATLAS, mag 18.036 at discovery
R.A. = 21h57m46s.340, Decl. = +30°56’51”.71

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-12.970
Approx mag 18.02CV ±0.03, ZP=28.343mag
0.25m/f4 reflector + CCMOS, 0.5″/pixel
3x300s, bin 1×1

AT2018gfb, Type unknown
Discovered 2018-09-08.259 by Gaia, mag 17.41 at discovery
R.A. = 20h52m37s.999, Decl. = +30°33’10”.80

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-13.042
Approx mag 17.65CV ±0.01, ZP=28.834
0.25m/f4 reflector + CCMOS, 0.5″/pixel
4x300s, bin 1×1