David's Astronomy Pages CCD Images - Session 932 (2021-11-09)

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Images (S932)

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Session Notes

Nova Cas 2021 - Nova (V1405 Cas) IC 190 - Elliptical Galaxy with Type Ia Supernova 2021abko NGC 157 - Spiral Galaxy (Herschel II-3) NGC 1569 - Irregular Galaxy with Type HPM Transient AT2021aczn GCVS RR Lyr - Variable Star,  RR Lyr Type (HIP 95497) NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl UGC 1977 - Spiral Galaxy (PGC 9557)           Variable Stars (photometric monitoring) - TT Ari, SS Cyg, BL Lac      Nearby Stars (astrometric monitoring) - None

- Evening session 3.4 hours - Session ended early after there was a shutter closing issue whilst suspending session due to cloud. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 8°C (min) - CCD Temperature:  -15°C - Notes from 2021-11-09 >>    [ Local Files >> ]       - Aurora Images/Video from 2021-11-09 >>

Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas

Nova Cas 2021 / AT2021hkn - 2021-11-09 (T+236.4d) Image below (2021-11-09.816) was taken 236.4 after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +8.42 (linked with Detection Threshold = 50)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-11-09 19:37 UT (#932004-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-11-09 (T+236.4d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-11-09 19:37 UT (#932004-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae Page >>

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IC 190 - Elliptical Galaxy with Type Ia Supernova 2021abko

IC 190 with SN2021abko (Aries) SN 2021abko (Type: Ia) discovered 2021-10-14.520 UT by ASAS-SN Alias: ASASSN-21tk, ZTF19acetzrc  (Rochester Supernova site )

IC 190 with SN2021abko - 2021-11-09 (T+26.3d) Image below (2021-11-09.857) was taken 26.3 days after discovery of 2021abko Galaxy with supernova shown by white cross-hairs Measured magnitude of galaxy + SN is +14.6 (vs host galaxy catalog mag of +14.2 or +15.2) Possible evidence for supernova in the second host galaxy magnitude case

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-09 20:44 UT (#932038-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN2021abko (IC 190) on Supernovae 2021 Page >>

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NGC 157 - Spiral Galaxy (Herschel II-3)

NGC 157 (Cetus) Alias: Herschel II-3 S-Shaped Spiral Galaxy  [  Herschel 400 Objects  ]

Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-09 21:07 UT (#932047-50) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 157 / H II-3 - Detail

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

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

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NGC 1569 - Irregular Galaxy with Type HP Transient AT2021aczn

NGC 1569 with AT2021aczn (Camelopardalis) AT2021aczn (Type: HPM) discovered 2021-11-01.000 UT by Jordi Camarasa (  (Rochester Supernova site | Odd Trondal image )  HPM - High Proper Motion star ?

Annotated CCD Image (50% size, log scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-09 21:42 UT (#932060-64) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1569 - 2021-11-09 (T+8.9d) Image below (2021-11-09.898) was taken 8.9 days after discovery of 2021aczn No indication of any obvious transient object (new image compares well with an image taken in 2013

CCD Image (125% size, log scale, cropped) Image details as above

The object marked as a 'Supernova' in Odd Trondal image is shown in the  image below by white cross-hairs, but the feature doesn't seem to have changed since image taken in 2013

Annotated CCD Image (125% size, log scale, cropped) Image details as above

Images of AT2021aczn (NGC 1569) on Transients 2021 Page >>

NGC 1569 - Earlier Image (2013)

CCD Image (125% size, log scale, cropped) 4 x 120 sec exposure (average combine), 3x3 binning, C Filter 2013-10-15 19:08hUT (#549026-31) 12" LX200R  (at f/9.7) + ST-10XME

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GCVS RR Lyr - Variable Star,  RR Lyr Type (HIP 95497)

GCVS RR Lyr (Lyra) Alias: HIP 95497 RR Lyr, Period 0.5669 days

RR Lyr  Realtime Spectra - Corrected.

Spectra produced in AstroMain using Image taken with Star Analyser 200 45s exposure (single frame), 2x2 binning, S Filter 2021-11-09 22:08 UT (#932091) 12" LX200R (at f/10.4) + ST-10XME

RR Lyr Spectra - Corrected.

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 45s exposure (average combine), 2x2 binning, S Filter 2021-11-09 22:07 UT (#932088-92) 12" LX200R (at f/10.4) + ST-10XME

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NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl

NGC 940 with SN2021vtl (Triangulum) SN 2021vtl (Type: Ia) discovered 2021-08-11.930 UT by XOSS Alias: PSP21D, Gaia21duk, PSN J02292803+3138385  (Rochester Supernova site )

NGC 940

Annotated CCD Image  (50% size, square root scale) 180s exposure (single frame), 3x3 binning, C Filter 2021-11-09 22:36 UT (#932114) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 940 with SN2021vtl - 2021-11-09 (T+90.0d) Image below (2021-11-09.940) was taken 90.0 days after discovery of 2021vtl Position of earlier reported SN is shown by white cross-hairs No indication of SN object, this is most probably because SN has faded combined with a poor image quality (due to poor guiding & no frame stacking)

Annotated CCD Image  (100% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-11-09 22:36 UT (#932114) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021vtl (NGC 940) on Supernovae 2021 Page >>

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UGC 1977 - Spiral Galaxy (PGC 9557)

UGC 1977 / PGC 9557

Annotated CCD Image  (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-09 22:53 UT (#932117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 1977 - Detail UGC 1977 / PGC 9557 with adjacent galaxy PGC 213003 Earlier transient AT2021irz (Type: unk) discovered 2021/04/07.539 UT by Gaia  (Alias: Gaia21bsj ) is no longer visible The gsaweb web page for Gaia21bsj shows that transient reached mag +17.8 on 2021-04-07 before fading to +20.9 by 2021-07-05

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

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

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