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This page documents observations and images of Type CV Transients, 2020-2021
Note : Supernovae and Novae transients are documented elsewhere (Supernovae 2021, Novae)CV Name, type, discovery date, alias
| AT 2021bkv (CV) (Auriga) AT 2021bkv (Type: CV) discovered 2021/01/31.675 UT by XOSS Alias: XM48HT ( Rochester Supernova site ) |
| AT 2021bkv (CV) - 2021-03-05 (T+33.2d) Image below (2021-03-05.897) was taken 33.2 days after discovery of 2021bkv Reported position of CV is shown by white circle. No obvious indication of an object at the reported position. Transient is therefore unconfirmed (CV may have faded to be at or below the limiting magnitude of image) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-05 21:34 UT (#867053-57) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021bkv / HV Aur Detailed inspection of the image shows a faint stellar object at the position of HV Aur in the following enlarged negative display. This would seem to confirm that the AT 2021bkv transient has faded back to its normal magnitude |
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| Negative CCD Image (150% size, linear scale, cropped) Image details as above |
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| AT 2021dbp (Auriga) AT 2021dbp (Type: CV) discovered 2021/02/14.535 UT by Gaia Alias: Gaia21auv, GSC 2374:280 ( Rochester Supernova site | Gaia21auv ) Based on Gaia Alert at magnitude +10.04 |
| AT 2021dbp - 2021-02-16 (T+2.3d) CV is shown by white cross hairs. |
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| Annotated CCD Image (50% size, linear scale) 2 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-16 20:34 UT (#859046-48) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021dbp - 2021-02-16 (T+2.3d) Image below (2021-02-16.854) was taken 2.3 days after discovery of 2021dbp CV is shown by white cross hairs. Measured Magnitude +10.5 (vs GSC magnitude +10.2) |
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| Annotated CCD Image (100% size, linear scale, cropped) 2 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-16 20:34 UT (#859046-48) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2021dbp on Transients 2021 Page >> |
| Image Sequence T+2.3d to T+43.3d |
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| AT 2021bxp (Leo Minor) AT 2021bxp (Type: CV) discovered 2021/02/05.909 UT by XOSS Alias: XM51HT, TCP J10203579+3103424, ZTF21aaherhg ( Rochester Supernova site ) |
| AT 2021bxp - Earlier Image (2021-02-28, T+22.1d) Image below (2021-02-28.053) was taken 22.1 days after reported discovery of 2021bxp CV is shown by white cross-hairs. Measured magnitude +15.2 |
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| Annotated CCD Image (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-28 01:20 UT (#865142-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021bxp - 2021-03-13 (T+36.0d) Image below (2021-03-13.917) was taken 36.0 days after discovery of 2021bxp CV (faint) is shown by white cross-hairs. |
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| Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-13 22:05 UT (#869048-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021bxp - Negative Image (T+36.0d) CV (faint) is shown by black cross-hairs. |
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| Annotated negative CCD Image (100% size, square root scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-13 22:05 UT (#869048-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021bxp - 2021-03-23 (T+45.1d) Image below (2021-03-23.022) was taken 45.1 days after reported discovery of 2021bxp Position of reported CV is shown by white circle. Object is no longer visible at reported position and is presumed to have faded between T+22.1d and T+45.1d. |
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| Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:36 UT (#874138-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2021cxz (Monoceros) AT 2021cxz (Type: CV) discovered 2021/02/13.759 UT by Gaia Alias: Gaia21aua ( Rochester Supernova site ) Galactic plane source brightens by 0.25 mag in 18 months |
| AT 2021cxz - 2021-02-27 (T+14.1d) Transient is shown by white cross hairs. |
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| Annotated CCD Image (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-27 20:21 UT (#865031-34) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021cxz - 2021-02-27 (T+14.1d) Image below (2021-02-27.846) was taken 14.1 days after discovery of 2021cxz Transient is shown by white cross hairs. Measured Magnitude +14.4 vs UCAC2 magnitude +14.2 |
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| Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-27 20:21 UT (#865031-34) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| 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 Alerting magnitude +11.05 Historic magnitude +11.29 (GSC Magnitude +11.17) |
| AT 2021dtd - 2021-02-25 (T+5.1d) Image below (2021-02-25.143) was taken 5.1 days after discovery of 2021dtd CV is shown by white cross hairs. Measured Magnitude +10.9 Bright star is same FOV is HIP 105091 (mag +6.4) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-25 03:36 UT (#862057-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021dtd - 2021-03-22 (T+30.9d) Image below (2021-03-22.951) was taken 30.9 days after discovery of 2021dtd CV is shown by white cross hairs. Measured Magnitude +10.8 |
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| Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-22 21:18 UT (#874025-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| 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 |
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| Annotated CCD Image (100% size, linear scale, cropped) 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 |
| AT 2021dtd - 2021-03-14 (T+22.0d) Image below (2021-03-14.092) was taken 22.0 days after discovery of 2021dtd CV is shown by white cross hairs. Measured Magnitude +10.92 |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-14 02:22 UT (#869149-53) 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 >> With Image Sequence T+5.6d to T+30.9d |
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| AT 2021elr (Monoceros) AT 2021elr (Type: CV) discovered 2021/03/03.586 UT by Gaia Alias: Gaia21bev ( Rochester Supernova site | Gaia21bev ) Candidate Be star CoRoT 102656190 brightens by 0.2 mag Transient triggererd at alerting magnitude of +13.78 Historic magnitude +13.95 UCAC2 star magnitude +13.80 |
| AT 2021elr - 2021-03-05 (T+2.3d) Image below (2021-03-05.919) was taken 2.3 days after discovery of 2021elr CV is shown by white cross hairs. Measured Magnitude +13.9 |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-05 22:08 UT (#867067-71) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2021uoa (Cygnus) AT 2021uoa (Type: CV) discovered 2021/07/31.106 UT by Gaia Alias: Gaia21don ( Rochester Supernova site , Gaia21don) 0.3 mag rise in Gaia source, previous event in lightcurve Alerting magnitude +14.59 Historic magnitude +14.88 |
| AT 2021uoa - 2021-08-13 (T+13.9d) CV is shown by white cross hairs. |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-08-13 23:59 UT (#905064-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021uoa - 2021-08-13 (T+13.9d) Image below (2021-08-13.997) was taken 13.9 days after discovery of 2021uoa CV is shown by white cross hairs. Measured Magnitude +14.2 (linked with Detection Threshold = 30) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-08-13 23:59 UT (#905064-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2021vfg (Pegasus) AT 2021vfg (Type: CV) discovered 2021/08/07.480 UT by ASAS-SN Alias: ASASSN-21pf ( Rochester Supernova site ) Discovery Mag +13.7, Outburst Amplitude 9 mag Matches to blue PS1 gmag. +22.8 source. CV Candidate but may be a nova |
| AT 2021vfg - 2021-08-13 (T+6.5d) CV is shown by white cross hairs. |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-08-13 22:57 UT (#905011-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2021vfg - 2021-08-13 (T+6.5d) Image below (2021-08-13.954) was taken 6.5 days after discovery of 2021vfg CV is shown by white cross hairs. Measured Magnitude +15.3 |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-08-13 22:57 UT (#905011-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2022jw (Hercules) AT 2022jw (Type: CV) discovered 2022-01-08.702 UT by Gaia Alias: Gaia22acy 5 mag outburst in candidate CV Alert triggered at mag 13.26 (vs historic magnituude 17.97) (Rochester Supernova site | TNS 2022jw | Gaia22acy ) |
| AT 2022jw - 2022-02-11 (T+33.5d) Image below (2022-02-11.208) was taken 33.5 days after discovery of 2022jw Position of reported transient (faint) is shown by white cross-hairs Measured magnitude +18.3 Transient has faded back to historic levels |
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| Annotated CCD Image (100% size, square root scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-11 05:04 UT (#969174-78) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2022hy (Lynx) AT 2022hy (Type: CV) discovered 2022-01-09.456 UT by ATLAS Alias: ATLAS22bfj Discovery Magnitude +15.93 Possible CV [ TNS 2022hy ] |
| AT 2022hy - 2022-01-21 (T+12.5d) Image below (2022-01-21.972) was taken 12.5 days after discovery of 2022hy Position of reported transient (fading) is shown by white cross hairs. Measured Magnitude +17.05 (Clear Filter) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-01-21 23:23 UT (#957187-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022hy - Reference Image (DSS2 Color) Reported transient position is shown by purple cross hairs. No object is evident at the transients reported position. |
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| DSS2 Image, screen captured via Aladin |
| AT 2022hy - 2022-01-28 (T+19.5d) Image below (2022-01-28.931) was taken 19.5 days after discovery of 2022hy Position of reported transient (fading) is shown by white cross hairs. Measured Magnitude +17.71 (Clear Filter) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-01-28 22:24 UT (#961003-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022hy - 2024-10-27 (T+1021.7d) Image below (2024-10-27.160) was taken 1021.7 days after discovery of 2022hy Position of earlier transient (faded & no longer visible) is shown by white cross hairs. Non-Detection Limiting Magnitude +19.2 (Clear Filter)) |
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| Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-10-27 03:53 UT (#1260107-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2022abr (Coma Berenices) AT 2022abr (Type: CV) discovered 2022-01-19.672 UT by MASTER Alias: MASTER OT J130738.14+210242.9 ( Rochester Supernova site | TNS 2022abr ) |
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| Annotated CCD Image (50% size, linear scale) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-14 22:03 UT (#971013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022abr - 2022-03-07 (T+47.2d) Image below (2022-03-07.860) was taken 47.2 days after discovery of 2022abr Transient is indicated by white cross-hairs Measured magnitude +17.6 |
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| Annotated CCD Image (100% size, square root scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-03-07 20:41 UT (#984009-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022abr - 2022-03-23 (T+62.5d) Image below (2022-03-23.135) was taken 62.5 days after discovery of 2022abr Transient (very faint) is indicated by white cross-hairs |
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| Annotated CCD Image (100% size, square root scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2022-03-23 03:17 UT (#992189-93) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| AT 2022bpl (Cancer) AT 2022bpl (Type: CV) discovered 2022-02-06.784 UT by XOSS Alias: XM100HT Discovery magnitude ( Rochester Supernova site | TNS 2022bpl ) Transient position (not visible) is indicated by white cross-hairs No evidence of any object at reported position. |
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| Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-14 23:22 UT (#971066-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022bpl - 2022-02-14 (T+8.2d) Image below (2022-02-14.972) was taken 8.2 days after discovery of 2022bpl Transient position (not visible) is indicated by white cross-hairs No evidence of any object at the reported position. |
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| CCD Image (125% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-14 23:22 UT (#971066-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022bpl - Reference Image (DSS2 Color) Position of reported transient is shown by purple cross hairs. Simbad shows CataclyV star SDSS J080934.78+121942.9 at the position of the reported transient |
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| DSS2 Image, screen captured via Aladin |
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| AT 2022bqs (Canis Major) AT 2022bqs (Type: CV) discovered 2022-02-08.290 UT by ASAS-SN Alias: ASASSN-22bs Bright CV candidate, could also be a Galactic Nova Discovery magnitude +12.2 ( Rochester Supernova site | TNS 2022bqs ) |
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| Annotated CCD Image (50% size, linear scale) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-14 22:03 UT (#971013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022bqs - 2022-02-14 (T+6.6d) Image below (2022-02-14.916) was taken 6.6 days after discovery of 2022bqs Transient is indicated by white cross-hairs Measured magnitude +13.85 |
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| CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-14 22:03 UT (#971013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022bqs - Reference Image (DSS2 Color) Position of reported transient is shown by purple cross hairs. No object evident at transient position in this historic image. |
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| DSS2 Image, screen captured via Aladin |
| AT 2022bqs (CV) - 2022-02-20 (T+12.6d) Image below (2022-02-20.851) was taken 12.6 days after discovery of 2022bqs Transient is indicated by white cross-hairs Measured magnitude +14.58 |
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| CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-14 22:03 UT (#971013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2022bqs (CV) - 2022-02-22 (T+14.6d) Image below (2022-02-22.844) was taken 14.6 days after discovery of 2022bqs Transient is indicated by white cross-hairs Measured magnitude +14.79 (fading) |
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| CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-02-22 20:20 UT (#975035-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| This Web Page: | Type CV Transients |
| Last Updated : | 2024-10-28 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
