Month: September 2018

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Observation: AT2018gci

AT2018gci, Type unknown in Mrk 359
Discovered 2018/09/01.472  by ZTF, mag 17.99 at discovery
R.A. = 01h27m32s.530, Decl. = +19°10’43”.85

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-17.143
Approx mag 14.67CV ±0.00, ZP=28.719mag
Note: the coordinates provided are that of the core of Mrk 359 which is reported at 14.22V. It’s difficult to see how a 17.99mag event could be see at those coordinates.
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, bin 1×1

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Observation: AT2018gir

AT2018gir, Type unknown
Discovered 2018-09-15.365 by ATLAS, mag 18.119 at discovery
R.A. = 19h31m25s.700, Decl. = +44°11’24”.13

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-19.034
Approx mag 18.74CV ±0.02, ZP=29.299mag
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, bin 1×1

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Observation: AT2018glg

AT2018glg, Type unknown
Discovered 2018-09-14.773 by Gaia, mag 16.86 at discovery
R.A. = 21h52m32s.307, Decl. = +49°04’19”.46

Observer: Cedric Raguenaud, SW France, GSNST
2019-09-19.094
Approx mag 17.16CV ±0.01, ZP=29.179mag
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, in 1×1

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Observation: AT2018glx

AT2018glx, Type unknown
Discovered 2018-09-12.458 by Gaia, mag 18.19 at discovery
R.A. = 23h07m39s.812, Decl. = +42°18’51”.95

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-19.060
Approx mag 19.57CV ±0.03, ZP=29.392mag
Note: the coordinates are that of Gaia DR2 1930770116620267136 which is reported at mag 19.21g. Given the difference ni mag compared to discovery and the existing object’s mag, it’s doubtful anything other than the pre-existing object is visible.
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, bin 1×1

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Observation: AT2018gcm

AT2018gcm, Type unknown
Discovered 2018-09-06.232 by ZTF, mag 16.56 at discovery
R.A. = 18h58m03s.230, Decl. = +25°08’28”.49

Observer: Cedric Raguenaud, SW France, GSNST
2018-09-14.944
Approx mag 17.70CV ±0.01, ZP=29.603mag
0.25m/f4 reflector + CCMOS, 0.5″/pixel
6x300s, bin 1×1