David's Astronomy Pages CCD Images - Session 868 (2021-03-11)

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AT 2021dtd - Type CV Transient     CGCG 056-009 - Galaxy with Type Ia Supernova 2021apf LEDA 1634284 - Galaxy with Type Ia Supernova 2021bkw     NGC 304 - Spiral Galaxy with Type Ia Supernova 2021dnn     SN 2021xn - Type Ia Supernova in PGC 6041       - Attempted image of UGC 1436, AT 2021dbp, AT 2021ckv, UGC 2505 (failed due to wind / seeing),   UGC 5829 (failed to centre), NGC 3254 (failed due to cloud)     Variable Stars (photometric monitoring) - U Her, RZ LMi, CY Lyr, - Attempted image of Nova Per 2020 (failed due to wind/seeing)     Nearby Stars (astrometric monitoring) - Barnards Star, DX Cnc - Attempted image Scholz's Star (failed due to cloud)

- All Night session (9.3 hours) - Main aims of the session were to acquire a selection of variable star, nearby star and comet targets and deep sky targets as cloud/showers allowed - Session affected by wind / poor seeing and occasional cloud - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 2.5°C (min) - CCD Temperature:  -20°/-25°C - Notes from 2021-03-11 >>    [ Local Files >> ]   -

AT 2021dtd - Type CV Transient, Be-type event

AT 2021dtd (Cepheus) AT 2021dtd (Type: CV) discovered 2021/02/20.084 UT by Gaia Alias: Gaia21bal,   GSC 2374:280  ( Rochester Supernova site | Gaia21bal ) 0.25 mag brightening in blue star, Be-type event

AT 2021dtd - 2021-03-12 (T+20.1d) Image below (2021-03-12.150) was taken 20.1 days after discovery of 2021dtd CV is shown by white cross hairs.   Measured Magnitude +10.5  Bright star is same FOV is HIP 105091 (mag +6.4)

Annotated CCD Image  (50% size, linear scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-12 03:45 UT (#868110-14) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dtd on Transients 2021 Page >>

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CGCG 056-009 - Galaxy with Type Ia Supernova 2021apf

CGCG 056-009 with SN 2021apf (Ophiuchus) SN 2021apf (Type Ia, z=0.006531) discovered 2021/01/16.557 UT by ZTF Alias: ZTF21aafdxca Discovery Magnitude 15.34 (r-0ZTF Filter)  (Rochester Supernova site | Fabio Feijo image | TNS 2021apf )

CGCG 056-009 with SN 2021apf - 2021-03-12 (T+54.6d) Image below (2021-03-12.200) was taken 54.6 days after discovery of 2021apf SN is shown by white cross hairs.   Measured magnitude ? (unable to extract SN properties using CCDSoft/Sextractor, object too faint)

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-12 04:57 UT (#868166-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021apf (CGCG 056-009) on Supernovae 2021 Page >>

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LEDA 1634284 - Galaxy with Type Ia Supernova 2021bkw

LEDA 1634284 with SN 2021bkw (Bootes) SN 2021bkw (Type: Ia) discovered 2021/01/31.553 UT by ATLAS Alias: ATLAS21dhp [ Supernovae ]  (Rochester Supernova site | Gianluca Masi image  )

LEDA 1634284 (alias PGC 1634284)

Annotated CCD Image  (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-12 04:09 UT (#868119-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 1634284 with SN 2021bkw - 2021-03-12 (T+39.6d) Image below (2021-03-12.165) was taken 39.6 days after discovery of 2021bkw Measured Magnitude +16.0 (SN + Host Galaxy Nucleus)

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-12 04:09 UT (#868119-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021bkw (LEDA 1634284) on Supernovae 2021 Page >>

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NGC 304 - Spiral Galaxy with Type Ia Supernova 2021dnn

NGC 304 with SN 2021dnn (Andromeda) [ Supernovae 2021 ] SN 2021dnn (Type: Ia) discovered 2021/02/22.225 UT by ATLAS Magnitude +18.3 at discovery Alias: ZTF21aabpszb, Gaia21adm  (Rochester Supernova site | TNS | )

NGC 304 with SN 2021dnn - 2021-03-11 (T+60.7d) Image below (2021-03-11.888) was taken 60.7 days after discovery of 2021dnn SN position is shown by white circle. No object is visible at SN's reported position (white circle) (image is single frame taken under poor sky conditions with wind & poor seeing)

Annotated CCD Image  (150% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-03-11 20:30 UT (#868020) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021dnn (NGC 304) on Supernovae 2021 Page >>

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SN 2021xn - Type Ia Supernova in PGC 6041

SN 2021xn (Perseus) Faint Galaxy (PGC 6041, SDSS J013751.16+533958.8, catalog mag +16.1) with Type Ia Supernova [ Supernovae ] SN 2021xn (Type: Ia) discovered 2021/01/10.158 UT by ZTF Alias: ZTF21aacvhsc  (Rochester Supernova site | Claudio Balcon image  )

PGC 6041 with SN 2021xn - 2021-03-11 (T+60.7d) Image below (2021-03-11.888) was taken 60.7 days after discovery of 2021xn No object is visible at SN's reported position (white circle) (image was taken under poor sky conditions with wind & poor seeing)

Annotated CCD Image  (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-11 21:25 UT (#868042-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021xn (PGC 6041) on Supernovae 2021 Page >>

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