Type Ia supernova 2022hrs in NGC 4647

2022-06-03T10:48:50+00:0019 April 2022|News, Supernova|

2022hrs (= ATLAS22mip), TNS discovered 2022/04/16.619 by Koichi Itagaki
Found in NGC 4647 at R.A. = 12h43m34s.350, Decl. = +11°34’36”.00
Located 30″.0 east and 18″.7 south of the center of NGC 4647
Galaxy is about mag. 12.5, supernova about mag. 14.1 R  using photometry with ASTAP.

Object IDSupernova 2022hrs
Details2022-04-18 23:20 UT
Telescope250mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)3 x 180s
d,f,b
CaptureNINA
ProcessingPhotoshop, ASTAP

Here’s the light curve from the BAA VSS database, including some of my observations (the very first red point – bottom left – is mine, as are some of the V CCD measurements).

Type II supernova 2022ewj in NGC 3367

2022-03-23T09:00:17+00:0023 March 2022|News, Supernova|

2022ewj (= ATLAS22jhw), TNS discovered 2022/03/19.544 by Koichi Itagaki
Found in NGC 3367 at R.A. = 10h46m34s.630, Decl. = +13°45’16”.98
Galaxy is about mag. 12, supernova about mag. 16.3 R  using photometry with ASTAP.

Object IDSupernova 2021ewj
Details2022-03-22 22:31 – 22:42 UT
Hazy skies
Telescope250mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)5 x 180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop, ASTAP

SN 2021agpf in NGC 5732

2022-03-17T16:48:06+00:0017 March 2022|News, Supernova|

2021agpf (= ATLAS21bnoc), TNS discovered 2021/12/26.624 by ATLAS
Found in NGC 5732 at R.A. = 14h40m37s.708, Decl. = +38°37’56”.31
Galaxy is about mag. 14, supernova about mag. 17.3 using photometry with ASTAP.

Object IDSupernova 2021agpf
Details2022-03-16 22:19 – 22:47 UT
Strong moonlight
Telescope240mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)10 x 180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop, ASTAP

Supernova SN 2020ue in NGC 4636

2021-12-31T14:05:47+00:0019 January 2020|Galaxy, News, Other, Supernova|

Object IDSN 2020ue
NGC 4636
Details2020-01-19 01:12:57 UT
Muniwin gives mag. as 12.56
RA = 12 42 47
DEC = +2 39 35
FWHM = 2.77 pxl
Sky = 1708.31 ADU
Sky dev. = 50.19 ADU
Net intensity = 94384.6 ADU
Noise = 271.5 ADU
S/N ratio = -25.4 dB
Brightness = 12.5627 mag
Error = 0.0031 mag
Telescope250mm f4.8 OO Newtonian
CameraAtik 460EX @-15C
Exposure(s)5x120s 2×2 TR
CaptureAPT
ProcessingNebulosity, Muniwin