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

Objects Session Notes
Bullet GCVS RR Lyr - Variable Star,  RR Lyr Type (HIP 95497)
Bullet Nova Cas 2021 - Nova (V1405 Cas)
   
Bullet IC 190 - Elliptical Galaxy with Type Ia Supernova 2021abko
   
Bullet NGC 157 - Spiral Galaxy (Herschel II-3)
Bullet NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl
Bullet NGC 1569 - Irregular Galaxy with Type HPM Transient AT2021aczn
   
Bullet UGC 1977 - Spiral Galaxy (PGC 9557)
    
    
Bullet Variable Stars (photometric monitoring)
- TT Ari, SS Cyg, BL Lac
    
Bullet 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 >>
   

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

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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
Image
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)
Image
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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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 ?
Image
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
Image
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
Image
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)
Image
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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UGC 1977 - Spiral Galaxy (PGC 9557)

UGC 1977 / PGC 9557
Image
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
Image
Annotated CCD Image  (150% size, square root scale, cropped)
Image details as above
  
Image
Negative CCD Image  (150% size, square root scale, cropped)
Image details as above
  

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