AstroNotes

We report the detection of a possible Type II Supernova in the JWST NIRCam imaging of the galaxy cluster WHL0137-08 (GO 2282, PI: Coe Dan). Due to limited photometry and lack of spectra of the host g…

We report the identification and spectroscopic observations of a bright near-IR (NIR) Galactic transient WNTR25fhdoi / AT2025sqe.

Here we report the ATLAS discovery of the transient ATLAS25kye (AT2025wug) in galaxy NGC 0140 at magnitude m_w = 18.96 +/- 0.13. At a distance of 93 Mpc, the transient was discovered on MJD = 60920…

Here we report the ATLAS discovery of the transient ATLAS25kxz (AT2025wsz) in galaxy SDSS J074931.57+492934.3 at magnitude m_o = 17.91 +/- 0.07. At a distance of 95 Mpc, the transient was discovered…

This report includes classifications of 1 Type Ia-91-T-like, 1 type II, and 2 ambiguous objects displaying blue continua.

The Public AEON Spectroscopic Survey for Transient Astronomy (PASSTA) is a new collaboration to obtain both rapid and long-term observations of nearby supernovae discovered shortly after explosion us…

Here we report the ATLAS discovery of the transient ATLAS25kwu (AT2025wrd) in galaxy NGC 4835 at magnitude m_o = 17.13 +/- 0.14. At a distance of 23 Mpc (redshift independent, from NED), the transie…

We have obtained an optical spectrum of SN 2025vgm, which shows it to be a young Type II supernova. The supernova exploded in the same galaxy as the Type Ia supernova SN 2017glz.

This report includes classifications of 7 Type Ia's (including 1 Type Ia-91T) and further observations of the TDE candidate AT 2025vjw. Although the nature of 2025vjw is not conclusive, we here updat…

We present a NOT/ALFOSC optical spectrum of the rising optical transient AT 2025vjw located in the nucleus of its host galaxy. The spectrum is blue and featureless. There are no evident host galaxy l…

This report includes classifications of 6 SNe Ia, 1 SN Ic-BL, and 1 SN II. We draw particular attention to three objects: SN2025wfz, a candidate SLSN, AT2025seu, a candidate luminous fast cooler even…

Here we report the ATLAS discovery of the transient ATLAS25ktd (AT2025wfz) in galaxy CGCG 454-042 at magnitude m_c = 19.02 +/- 0.12. At a distance of 95 Mpc, the transient was discovered on MJD = 60…

This report includes classifications of 1 Type Ia and 3 Type Ic SNe (including 1 type Ic-BL). Of note is SN 2025vzq, a very young and rising Type Ic SNe discovered by GOTO in the galaxy NGC 7606 at a…

We report ZTF and LT observations of a fast and blue optical transient, AT2025wap (ZTF25abkgjzb).

We report ZTF and LT observations of a fast and blue optical transient, AT2025wap (ZTF25abkgjzb).

We report on AT 2025seu as a superluminous supernova candidate in the red galaxy DESI J268.3778+61.7777 with a DESI DR1 spectroscopic redshift of z = 0.2544.

This report includes classifications of 7 Type Ia's (including a type Ia-91T), 1 Type II,1 Type IIb, 1 Type Ib-pec and a blue continuum with weak Balmer emission. Of note are SN 2025mlx and SN 2024ad…

This report includes classifications of 3 Type Ia's.

This report includes classifications of 2 Type Ic's.

We report on the optical multiband photometric follow-up of SN 2025pht conducted with the BHTOM.space global telescope network.

Here we report the ATLAS discovery of the transient ATLAS25kew (AT2025vaw) in galaxy UGC 10809 NED01 at magnitude m_w = 17.37 +/- 0.06. At a distance of 79 Mpc, the transient was discovered on MJD =…

We present (SDSS) g&r filter photometric follow up observations of selected optical transients obtained using the 1.82-m Plaskett telescope of the (Dominion Astrophysical Observatory) National Resear…

Here we present multi-band photometric follow up observations of 15 optical transients using 1.82-m Plaskett Telescope + CCD at Dominion Astrophysical Observatory of the National Research Council of …

We present the multiband photometry follow-up of SN 2025rbs by the Observadores de Supernovas group (ObSN, Spain).

Here we present multi-band photometric follow up observations of SN 2025rbs in NGC 7331 using 1.82-m Plaskett Telescope + CCD at Dominion Astrophysical Observatory of the National Research Council of…

This report includes one classification of a Type Ia 91T-like.

We report 1 SLSN and 1 TDE candidates from the ZTF public alert stream, identified by the NEEDLE classifier running on the Lasair alert broker. We encourage spectroscopic classification of these even…

Here we report the ATLAS discovery of the transient ATLAS25jgd (AT2025tpr) in galaxy 2MASX J05581494-7246383 at magnitude m_o = 18.41 +/- 0.12. At a distance of 103 Mpc, the transient was discovered…

Here we report the ATLAS discovery of the transient ATLAS25jho (AT2025tta) in galaxy UGC 09015 at magnitude m_o = 18.80 +/- 0.14. At a distance of 101 Mpc, the transient was discovered on MJD = 6090…

This report includes classifications of 2 Type Ia,1 SLSN, 1 Type IIn and one unknown transient.

We report on the optical photometric follow-up of AT2025ggn (ASASSN-25ax) conducted with the BHTOM.space global telescope network.

A very young supernova candidate, AT2025tpu, is reported by the BlackGEM consortium in the Seyfert 2 galaxy IC 4769 at 58 Mpc. The transient was first detected at q=19.25 and confirmed to be brighten…

This report includes classifications of 2 SN Ias and 1 blue featureless continuum.

This report includes classifcations of 10 Type Ia's and a CV.

We report the classification of optical transient ZTF25abcemrc/AT2025spf as a tidal disruption event (TDE). The source was selected by the tdescore ML classifier (Stein+2024, doi: 10.3847/2041-8213/a…

We report the classification of the optical transient SN 2025sei/ZTF22aakyeps as a Type I superluminous supernova (SLSN-I) with an unusually fast rise time in a quiescent, early-type host galaxy.

This report includes a classification of 1 Type Ia, a reclassification of 1 Type II and a featureless blue continuum.

This report includes classifications of 3 Type Ia's, two Type II's and a featureless continuum.

This report includes classifications of a Type la, a Type la-91T-like, 2 Type II's and a blue featureless continuum.

We report the spectroscopic classification with NOT/ALFOSC of 7 optical transients. 4 SN Ia-norm, 2 SN IIP and 1 CV.

We report 2 SLSNe from the ZTF public alert stream, identified by the NEEDLE classifier running on the Lasair alert broker. We encourage spectroscopic classification of these events.

Here we report the ATLAS discovery of the transient ATLAS25jdr (AT2025tis) in galaxy IC 2007 at magnitude m_o = 15.84 +/- 0.03. At a distance of 22 Mpc, the transient was discovered on MJD = 60894.3…

The Caltech Summer Undergraduate Research Fellowship (SURF) program reports the classification of an optical transient using P200 NGPS: 1 type Ia supernova.

We announce the spectroscopic classification of AT2025qmk (SN II), AT2025rlk (SN Ia), and AT2025shi (SN IIn-pec).

Here we report the ATLAS discovery of the transient ATLAS25iym (AT2025tam) in galaxy NGC 6708 at magnitude m_o = 16.04 +/- 0.13. At a distance of 36 Mpc, the transient was discovered on MJD = 60889.9…

We report 2 SLSN and 1 TDE candidates from the ZTF public alert stream, identified by the NEEDLE classifier running on the Lasair alert broker. We encourage spectroscopic classification of these even…

Starting 2025 July 05 UTC, the Zwicky Transient Facility (ZTF) has begun mapping the accessible science validation footprint of the NSF-DOE Vera C. Rubin Observatory. Every night, this footprint is s…

We report on the optical photometric follow-up of SN 2025bof conducted with a telescope network through BHTOM.space system.

We report observations of various transients using the Kast spectrograph on the Shane 3m telescope at Lick Observatory on the night of 2025-07-20. New classifications were found for four objects, whi…