David's Astronomy - Images 2023-05-12 (S01119)

David's Astronomy Pages
Images - Session 1119 (2023-05-12)

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Objects Session Notes

AT 2021lwx - Type AGN Transient in Unnamed Galaxy (Attempt)

AT 2022fnb - CV Type Transient

AT 2023dwm - CV Type Transient

M108 - Spiral Galaxy with Type Ic Supernova 2023dbc

NGC 4611 - Spiral Galaxy with Type Ia Supernova 2023dtz

NGC 5915 - Spiral Galaxy with Type Ia Supernova 2023cpt

Variable Stars (photometric monitoring)

- None



Nearby Stars (astrometric monitoring)

- None



- Attempted all night session. Observing during first half of night (2.1 hours) only due to overcast skies/ cloud during the second half of the night.

- 12" LX200 + ST-10XME for imaging

- TS 80mm APO + ZWO ASI178MC for guiding & imaging

- Ambient Temperature: 6°C (min)

- CCD Temperature:   -15°C

- Notes from 2023-05-12 >>

-

AT 2021lwx - Type AGN Transient in Unnamed Galaxy (Attempt)

AT 2021lwx (Vulpecula)
2021lwx (Type: AGN) discovered 2021-04-13 10:55.51 UT by ZTF
Discovery Magnitude 18.05 (r-ZTF Filter)

Event was reported on BBC Website on 2023-05-12
"Astronomers detect largest cosmic explosion ever seen"
https://www.bbc.co.uk/news/science-environment-65571309
The explosion is more than 10 times brighter than any recorded
exploding star - known as a supernova. So far it has lasted more than three years, much longer than
most supernovae which are usually only visibly bright for a few months. One theory is that
the blast was caused when a vast cloud of gas was swallowed up by a black hole.
( TNS 2021lwx )

AT 2021lwx - 2023-05-12 (T+759.5d), Locate Frame
Position of reported transient (not visible) is shown by cyan circle

Annotated CCD Image (50% size, linear)
10s exposure (single frame), 3x3 binning, Clear Filter
2023-05-12 23:08 UT (#1119025)
12" LX200R (at f/10.4) + ST-10XME

AT 2021lwx - 2023-05-12 (T+759.5d)
Image below (2023-05-12.967) was taken 759.5 days after discovery of 2021lwx
Position of reported transient (not visible) is shown by white circle
Poor quality image (poor guiding / single frame only)

Annotated CCD Image (100% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-05-12 23:13 UT (#1119026)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021lwx - 2023-05-12 (T+759.5d)
Above image altered to remove guiding artefact

Annotated CCD Image (100% size, square root scale, cropped)
Image details as above

Images of AT 2021lwx on Transients 2021 Page >>

AT 2022fnb - CV Type Transient

AT 2022fnb (Cepheus)
AT 2022fnb (Type: CV) discovered 2022-03-30.875 UT by MASTER
Alias: MASTER OT J222553.47+602042.5
Discovery magnitude 13.2 (Clear filter) vs Last Non-Detection at limiting mag 18.9
( TNS 2022fnb)

AT 2022fnb - 2023-05-12 (T+408.1d)
Image below (2023-05-12.951) was taken 408.1 days after discovery of 2022fnb
Position of earlier reported transient (fading slowly but still bright) is shown by white cross-hairs
Measured magntitude + 12.64

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-05-12 22:52 UT (#1119013-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022fnb - Reference Image (DSS2 Color)

Images of AT 2022fnb on Transients 2022 Page >>

AT 2023dwm - CV Type Transient

AT 2023dwm (Cygnus)
AT 2023dwm (Type: CV) discovered 2023-03-24.595 UT by MASTER
Alias: MASTER OT J203050.57+554708.9
Discovery Magnitude 12.6 (Clear Filter)
( TNS 2023dwm )

AT 2023dwm - 2023-05-12 (T+49.4d)
Image below (2023-05-12.959) was taken 49.4 days after discovery of 2023dwm
Position of reported transient (fading slowly) is shown by white cross-hairs
Measured magnitude +13.08

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-05-12 23:04 UT (#1119019-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023dwm on Transients 2023 Page >>

M108 - Spiral Galaxy with Type Ic Supernova 2023dbc

M108 with SN 2023dbc (Ursa Major)
SN 2023dbc (Type: Ic) discovered 2023-03-13.287 UT by ZTF
Alias: ZTF23aadaxfn, ATLAS23dsh
Discovery Magnitude 18.13 (orange-ATLAS Filter)
( TNS 2023dbc )

M108 with SN 2023dbc - 2023-05-12 (T+60.6d)
Image below (2023-05-12.931) was taken 60.6 days after discovery of 2023dbc
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-05-12 22:29 UT (#1119005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M108 with SN 2023dbc - Detail, 2023-05-12 (T+60.6d)

Annotated CCD Image (150% size, square root scale, cropped)
Image details as above

Images of SN 2023dbc (M108) on Supernova 2023 Page >>

NGC 4611 - Spiral Galaxy with Type Ia Supernova 2023dtz

NGC 4611 with SN 2023dtz (Coma Berenices)
SN 2023dtz (Type: Ia) discovered 2023-03-21.514 UT by ATLAS
Alias: ATLAS23eey
Discovery Magnitude 18.13 (orange-ATLAS Filter)
( TNS 2023dtz )

NGC 4611 with SN 2023dtz - 2023-05-12 (T+52.5d)
Image below (2023-05-12.982) was taken 52.5 days after discovery of 2023dtz
Measured Magnitude ? (unable to extract object)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-05-12 23:43 UT (#1119033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023dtz (NGC 4611) on Supernova 2023 Page >>

NGC 5915 - Spiral Galaxy with Type Ia Supernova 2023cpt

NGC 5915 with SN 2023cpt (Libra)
SN 2023cpt (Type: Ia, z=0.00758) discovered 2023-02-27.356 UT by ATLAS
Alias: ATLAS23cxk
Discovery Mag 17.10 (cyan-ATLAS filter)
( Rochester Supernova site | TNS 2023cpt )

NGC 5915 with SN 2023cpt - 2023-05-12 (T+74.6d)
Image below (2023-05-12.997) was taken 74.6 days after discovery of 2023cpt
Position of reported SN (very faint) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-05-13 00:03 UT (#1119040-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023cpt (NGC 5915) on Supernova 2023 Page >>

This Web Page:	Images - Session 1119 (2022-05-12)
Last Updated :	2024-06-15
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site