AstroNotes

Spectroscopy from the Liverpool Telescope shows AT2021gmj to be a young Type II supernova. The spectrum of AT2021gno is blue and featureless.

We observed AT 2021gca (ZTF21aapkbav) with the Lulin One-meter Telescope, Taiwan. We confirmed that the object is fading 0.3 mag per day in r-band since the discovery. The current magnitude r = 20.70…

We report the ZTF discovery of ZTF21aaqhhfu / 2021gno and ZTF21aaqgmjt / 2021gmj - two young supernova in the nearby galaxies NGC 4165 (z=0.0062,~46 Mpc) and NGC 3310 (z=0.0033,~13.1 Mpc). AT 2021gno…

We are carrying out the "Pan-STARRS Search for Kilonovae" which is a focused search for intrinsically faint transients, or rapidly evolving transients in galaxies which are closer than 200 Mpc in the…

We report the discovery of the fast, low-luminosity optical transient ZTF21aapkbav/AT2021gca with the Zwicky Transient Facility (ZTF). ZTF21aapkbav was first detected on 2021-03-17 09:23 UT at r=19…

Here we report the ATLAS discovery of the transient ATLAS21iid (AT2021gdz) in galaxy KUG 1150+203 at magnitude m_c = 18.39 +/- 0.08. At a distance of 93 Mpc, the transient was discovered on MJD = 59…

Here we report the classification of AT 2021esi as a Type IIb SN.

Here we report the ATLAS discovery of the transient ATLAS21iap (AT2021fpm) in galaxy MCG -02-51-008 at magnitude m_o = 16.69 +/- 0.04. At a distance of 81 Mpc, the transient was discovered on MJD = …

This report includes classifications of 5 transients.

This report includes the classification of AT 2021bxg as a Type IIn SN.

This report includes classifications of 7 transients.

We report ten ZTF superluminous supernova candidates selected by our software filter and subsequent vetting. In this sample, a typical rise time is about 50 days and a typical peak r-band magnitude i…

This report includes the classification of AT 2021dwg as a Type Ic SN.

Motivated by recent discovery and classification reports of transients with spectra showing prominent narrow emission lines of carbon and/or oxygen, but lacking lines of hydrogen and helium, we propo…

We have obtained an optical spectrum of SN 2021crx, which shows it to be an unusually luminous member of the class of low-velocity Type II supernovae.

Here we report the ATLAS discovery of the transient ATLAS21grj (AT2021dnn) in galaxy NGC 0304 at magnitude o = 15.71 +/- 0.03. At a distance of 65 Mpc, the transient was discovered on MJD = 59267.23 …

This report includes the classification of one Type Ia SN at pre-maximum.

We have obtained an optical spectrum of SN 2021ckj, which shows it to be an unusual Type I supernova with narrow carbon and helium lines superimposed on a blue continuum with several broad spectral f…

Here we report the ATLAS discovery of the transient ATLAS21gks (AT2021dct) in galaxy NGC 1207 at magnitude o = 19.31 +/- 0.17. At a distance of 64 Mpc, the transient was discovered on MJD = 59262.22 …

Here we report the ATLAS discovery of the transient ATLAS21ghj (AT2021dch) in galaxy WISEA J130523.61+293037.2 at magnitude c = 18.42 +/- 0.08. At a distance of 88 Mpc, the transient was discovered o…

This report includes classifications of 3 normal Type Ia SNe, one SN Ia-91T, one young Type II SN showing flash features, and one object was classified as a CV.

Here we report the ATLAS discovery of the transient ATLAS21gfy (AT2021dbg) in galaxy MCG -01-24-014 at magnitude m_c = 18.13 +/- 0.06. At a distance of 92 Mpc, the transient was discovered on MJD = …

Here we report the ATLAS discovery of the transient ATLAS21flz (AT2021cwc) in galaxy UGC 03502 at magnitude c = 18.25 +/- 0.09. At a distance of 90 Mpc, the transient was discovered on MJD = 59258.38…

We have obtained an optical spectrum of SN 2021cdw, which shows it to be a young Type II supernova.

We report the discovery of ZTF21aakilyd (AT 2021csp), a rapidly-rising and luminous (M ~ -20) blue transient at z=0.081. A Liverpool Telescope spectrum obtained shortly following the discovery is fe…

This report includes classifications of 3 Type Ia SNe and 1 Type II SN. For AT2021ckl the observed spectrum is consistent with only host galaxy light. The acquisition image of ZTF21aajezvp did not sh…

This report includes classifications of 3 Type Ia SNe, 2 Type II SNe, and 1 Type Ic SN.

We report the discovery of ZTF21aaiaqhh / 2021can - a rapidly rising young supernova in the nearby galaxy (z=0.0207, ~90 Mpc). The transient was discovered on February 07, 2021 at 07:55 UT with an ab…

We report the discovery of the fast optical transient ZTF21aahifke/AT2021clk with the Zwicky Transient Facility (ZTF, Bellm et al. 2019, Graham et al. 2019), as part of the "ZTFReST" project aiming a…

Here we report the ATLAS discovery of the transient ATLAS21dov (AT2021bxu) in galaxy ESO 478- G 006 at magnitude m_c = 17.23 +/- 0.05. At a distance of 65 Mpc (redshift independent, from NED), the t…

We report on the ZTF discovery of ZTF21aagwbjr/AT2021buv, a fast optical transient that is temporally and spatially consistent with GRB210204A. ZTF21aagwbjr was first detected 45 minutes after the lo…

This report includes classifications of 8 Type Ias, 1 Type II, and 1 CV.

Here we report the ATLAS discovery of the transient ATLAS21dmw (AT2021bsf) in galaxy WISEA J120604.02+203213.0 at magnitude o = 17.16 +/- 0.06. At a distance of 104 Mpc, the transient was discovered …

This report includes classifications of 6 Type Ias, 1 Type Ia-91T-like, 1 TDE, 1 SLSN-I and 1 Type II.

This report includes the classification of 3 Type Ia SNe, 1 Type Ic-BL, and 1 blue transient at an unknown redshift. We also report negative transient detections for two targets.

Here we report the ATLAS discovery of the transient ATLAS21dkt (AT2021bmx) in galaxy ESO 317- G 006 at magnitude o = 17.17 +/- 0.06. At a distance of 51 Mpc, the transient was discovered on MJD = 592…

Here we report the ATLAS discovery of the transient ATLAS21dks (AT2021bmw) in galaxy IC 4325 at magnitude o = 17.93 +/- 0.12. At a distance of 68 Mpc, the transient was discovered on MJD = 59247.54 (…

We update the classification of AT 2021tf as a Type Ibn supernova using the Lick 3-m Shane telescope.

This report includes classifications of 4 Type Ia, 1 Type Ia-pec, 1 Type Ibc, 1 Type I, and 1 AGN.

Here we report the ATLAS discovery of the transient ATLAS2021dia (AT2021bls) offset by 50 kpc from NGC 6223 at magnitude o = 17.39 +/- 0.05. At a distance of 80 Mpc, the transient was discovered on M…

Here we report the ATLAS discovery of the transient ATLAS21dic (AT2021blu) in galaxy UGC 05829 at magnitude m_o = 18.49 +/- 0.18. At a distance of 8 Mpc, the transient was discovered on MJD = 59246…

Here we report the ATLAS discovery of the transient ATLAS21dib (AT2021blt) in galaxy NGC 4214 at magnitude m_o = 18.52 +/- 0.12. At a distance of 3 Mpc, the transient was discovered on MJD = 59246.5…

Here we report the ATLAS discovery of the transient ATLAS21dhs (AT2021bkx) in galaxy WISEA J033454.41-004720.1 at magnitude m_o = 18.67 +/- 0.14. At a distance of 96 Mpc, the transient was discovere…

Here we report the ATLAS discovery of the transient ATLAS21dhp (AT2021bkw) in galaxy 2MASX J14211351+2042536 at magnitude m_o = 16.55 +/- 0.05. At a distance of 82 Mpc, the transient was discovered …

Here we report the spectroscopic classification of SN 2021bhd (ATLAS21dfr; Shingles et al. Astronote 2021-31) in galaxy UGC 08737. The spectrum shows a good match with several Type Ib/c supernovae. T…

Here we report the ATLAS discovery of the transient ATLAS21dgf (AT2021bjk) in galaxy MCG -02-06-017 at magnitude m_o = 18.65 +/- 0.13. At a distance of 71 Mpc, the transient was discovered on MJD = 5…

This report includes classifications of 6 Type Ia's and an unclassified object.

This report includes classifications of 2 Type Ia's, and 1 inconclusive object.

Here we report the ATLAS discovery of the transient ATLAS21dgc (AT2021bjb) in galaxy ABELL S0753:[WFC91] 065 at magnitude o = 18.08 +/- 0.19. At a distance of 57 Mpc, the transient was discovered on …

Here we report the ATLAS discovery of the transient ATLAS21dfz (AT2021biz) in galaxy NGC 4227 at magnitude m_o = 18.34 +/- 0.16. At a distance of 97 Mpc (redshift independent, from NED), the transie…