David's Astronomy Pages CCD Images - Session 870 (2021-03-14)

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Images (S871)

Objects	Session Notes
NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz UGC 5760 - Spiral Galaxy with Type II Supernova 2020zoq       - NGC 3515 and UGCA 245 attempts failed (due to cloud)     Variable Stars (photometric monitoring) -AM Her, CY Lyr     Nearby Stars (astrometric monitoring) - None	- All Night session (8.1 hours) - Session heavily interrupted by cloud, with only rare clearer intervals - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 4°C (min) - CCD Temperature:  -20°C - Notes from 2021-03-14 >>    [ Local Files >> ]   -

NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy

NGC 4631 with AT 2021biy (Canes Venatici) AT 2021biy (Type: LRN) discovered 2021/01/29.559 UT by ATLAS Alias: ATLAS21dfy (Discovery Note)  (Rochester Supernova site | Odd Trondal image | Nick James image ) LRN = Luminous Red Nova [ LRN Transients ]

NGC 4631 with AT 2021biy - 2021-03-16 (T+46.4d) Image below (2021-03-16.928) was taken 46.4 days after discovery of 2021biy LRN (very faint) is shown by white cross hairs.

Annotated CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-16 22:24 UT (#871052-55) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021biy (NGC 4631) on Transients 2021 Page >>

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NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz

NGC 4227 with SN 2021biz (Canes Venatici) SN 2021biz (Type: Ia) discovered 2021/01/29.543 UT by ATLAS Alias: ATLAS21dfz  (Rochester Supernova site | Gianluca Masi image | Jean-Claude Merlin image )

NGC 4227 with SN 2021biz - 2021-03-14 (T+44.4d) Image below (2021-03-14.954) was taken 44.4 days after discovery of 2021biz SN shown by white cross hairs.  Measured magnitude +16.58 (unchanged)

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-14 23:01 UT (#870033-36) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021biz (NGC 4227) on Supernovae 2021 Page >>

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UGC 5760 - Spiral Galaxy with Type II Supernova 2020zoq

UGC 5760 w/SN 2020zoq (Leo) SN 2020zoq (Type II, z=0.0, zhost=0.010040) discovered 2020/11/14.561 by ASAS-SN Discovery Magnitude +17.5 (g-Sloan)  (Rochester Supernova site | Discovery Image | TNS 2020zoq )

UGC 5760 with SN 2020zoq - 2021-03-14 (T+120.4d) Image below (2021-03-14.978) was taken 120.4 days after discovery of 2020zoq SN is shown by white cross hairs.  Measured magnitude ? Poor quality image (poor sky transparency / single subframe)

Annotated CCD Image (125% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-03-14 23:31 UT (#870042) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 5760 with SN 2020zoq - Earlier Image 2020-11-22 (T+11.7d) Image below (2020-11-26.219) was taken 11.7 days after discovery of SN 2020zoq SN is shown by white cross hairs.   Measured magnitude +15.75

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2020-11-26 05:16 UT (#833235-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2020zoq (UGC 5760) on Supernovae 2020 Page >>

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