2021 Supernova Boneyard

Welcome to the Boneyard.   On this page you will find entries for objects that have been confirmed as Cataclysmic variables, asteriods (otherwise known as Vermin of the sky), or some other non extragalactic event.   Why keep them around? Because you never know when something like this will come back to life...

AT2021tcq, TNS discovered 2021/07/11.035 by Leonini (ISSP)
Found in IC 1339 at R.A. = 20h57m56s.190, Decl. = -17°57'03".30
Located 9".6 east and 29".1 south of the center of IC 1339
Mag 16.3:7/11, Type unconfirmed

AT2021qis, TNS discovered 2021/06/18.968 by Massimo Caimmi (ISSP)
Found in LEDA 2453883 at R.A. = 14h58m04s.550, Decl. = +53°53'39".10
Located 3".6 east and 3".4 north of the center of LEDA 2453883 (Discovery image)
Mag 19.0:6/18, Type unconfirmed (zhost=0.081037)

AT2021puv (= ASASSN-21kt) (= Gaia21cxy), TNS discovered 2021/06/13.190 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 14h08m10s.553, Decl. = -45°26'50".71
Located 0".0 east and 0".0 north of the center of the host galaxy (Fabio Feijo image)
Mag 15.8:6/18 (15.3:6/13), Type CV (References: Gaia observations)

AT2021pfb, TNS discovered 2021/06/08.983 by Ron Arbour
Found in NGC 5669 at R.A. = 14h32m55s.290, Decl. = +09°55'10".80
Located 0".0 east and 0".0 north of the center of NGC 5669
Mag 17.9:6/8, Type *

AT2021mrk (= ASASSN-21ik), ATEL 14711 discovered 2021/05/15.190 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 18h40m09s.374, Decl. = -68°58'58".45
Located 0".4 west and 0".4 north of the center of host galaxy (Discovery image)
Mag 17.6:5/15, Type TDE? (z=0.047) (zhost=0.047526) (References: ATEL 14738, TNS)

AT2021lmq, TNS discovered 2021/05/05.000 by Stu Parker (BOSS)
Found in NGC 6822 at R.A. = 19h44m29s.820, Decl. = -14°47'05".02
Located 0".0 east and 0".0 north of the center of NGC 6822
Mag 16.2:5/5, Type MP (Note: asteroid)

AT2021kzb, TNS discovered 2021/05/02.998 by Paulo Cacella
Found in an anonymous galaxy at R.A. = 13h12m51s.920, Decl. = -47°28'09".26
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 16.7:5/2, Type HPM

AT2021kwb (= ASASSN-21gy), TNS discovered 2021/05/02.340 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 17h46m18s.506, Decl. = -22°09'46".98
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 15.1:5/2, Type Nova?

AT2021jws, TNS discovered 2021/04/16.751 by Dovron Mirzaqulov
Found in NGC 3367 at R.A. = 10h46m31s.700, Decl. = +13°45'23".10
Located 0".0 east and 0".0 north of the center of the NGC 3367 (Discovery image)
Mag 18.6:4/16, Type MP (Asteroid 67247 2000-EA82) (References: SN 2018kp, 2007am)

AT2021jby (= DLT21l), TNS discovered 2021/04/12.320 by DLT40
Found in ESO 269-G78 at R.A. = 13h16m54s.180, Decl. = -45°51'46".00
Located 0".0 east and 0".0 north of the center of ESO 269-G78
Mag 19.0:4/12, Type CV (References: AstroNote 2021-118)

AT2021itx (= Gaia21btc) (= MASTER OT J031055.01+472216.3) ATEL 14531 discovered 2021/04/02.785 by MASTER robotic Net
Found in PGC 2297096 at R.A. = 03h10m54s.972, Decl. = +47°22'16".90
Located 3".2 east and 24".1 south of the center of PGC 2297096 (Discovery image)
Mag 16.1:4/7, Type CV (References: Gaia observations)

AT2021ilb, TNS discovered 2021/04/05.815 by Lorenzo Siciliano
Found in M61 at R.A. = 12h21m53s.124, Decl. = +04°28'08".70
Located 0".0 east and 0".0 north of the center of M61
Mag 16.0:4/5, Type unconfirmed

AT2021gwt, TNS discovered 2021/03/22.801 by Shunji Sasaki
Found in PGC 86310 at R.A. = 13h49m04s.000, Decl. = -30°48'50".00
Located 0".0 east and 0".0 north of the center of PGC 86310
Mag 15.0:3/22, Type MP (MP 860 Ursina)

AT2021cek, TNS discovered 2021/02/06.501 by Akihiro Nakayama
Found in NGC 4041 at R.A. = 12h02m09s.500, Decl. = +62°08'08".50
Located 0".0 east and 0".0 north of the center of NGC 4041 (Discovery image)
Mag 16.5:2/6, Type unconfirmed

AT2021bxk, TNS discovered 2021/02/05.000 by Arttu Sainio
Found in an anonymous galaxy at R.A. = 17h38m21s.306, Decl. = -31°47'00".90
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 11.9:2/5, Type Nova?

AT2021blt (= ATLAS21dib) (= ZTF21aagsxeo), AstroNote 2021-42 discovered 2021/02/01.527 by ATLAS
Found in NGC 4214 at R.A. = 12h15m36s.390, Decl. = +36°20'33".75
Located 33".6 west and 56".6 north of the center of NGC 4214 (Manfred Mrotzek image unconfirmed) (Enrico Prosperi image)
Mag 18.5:2/1, Type unconfirmed (zhost=0.000970) (References: TNS, ZTF observations; SN 2010U, 1954A)

AT2021bkv (= XM48HT), TNS discovered 2021/01/31.675 by Xingming Observatory Sky Survey (XOSS) at R.A. = 04h53m16s.820, Decl. = +38°16'30".20 Mag 16.5:1/31, Type CV

AT2021acn (= AHTS-2021-001) (= ZTF19aaeidsm), TNS discovered 2021/01/11.194 by AHTS at R.A. = 06h50m48s.840, Decl. = +18°15'50".10 Mag 16.6:1/11, Type AGN (Claudio Balcon image) (References: ZTF observations)

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