AstroNotes

We report no radio source within 5 arcseconds of the reported location of supernova SN2025gvs, with a 3-sigma RMS of 99 microJy/beam, consistent with a non-detection at this time.

Here we report the ATLAS discovery of the transient ATLAS25eyd (AT2025kjo) in galaxy IC 1529 at magnitude m_c = 17.77 +/- 0.12. At a distance of 89 Mpc, the transient was discovered on MJD = 60803.14…

Here we report the ATLAS discovery of the transient ATLAS25exz (AT2025kiu) in galaxy 2MASX J01200501-3354009 at magnitude m_o = 17.10 +/- 0.11. At a distance of 46 Mpc, the transient was discovered …

Here we report the ATLAS discovery of the rapidly evolving transient ATLAS25evh (AT2025jzi) in galaxy WISEA J092321.66-202025.8 with current magnitude_o = 18.50 +/- 0.17. The transient was discovered…

We report 3 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…

We classify the optical re-brightening event towards AT 2021gqu as a peculiar Type Ia Supernova, based on optical spectroscopy.

Spectral classification of 2 transients and reclassification of 1 transient.

This report includes classifications of 1 Type Ic-BL and 2 Type Ia's. We encourage follow-up observations.

Spectral classification confirmation of 2 transients

Here we report the ATLAS discovery of the transient ATLAS25eqo (AT2025jsh) in galaxy ESO 263- G 014 at magnitude m_o = 18.12 +/- 0.14. At a distance of 75 Mpc, the transient was discovered on MJD = …

Here we report the ATLAS discovery of the transient ATLAS25eqm (AT2025jqz) in galaxy 2MASX J00083403+5530408 at magnitude m_o = 17.98 +/- 0.09. At a distance of 68 Mpc, the transient was discovered o…

This report includes classifications of 6 Type Ia's and 1 Type II SN. We encourage followup observations.

This report includes classifications of 2 Type II's, 1 Type Ia, 1 AGN, and 1 CV. We encourage follow-up observations.

Here we report the ATLAS discovery of the transient ATLAS25emr (AT2025izc) in galaxy SDSS J092254.16+463203.9 at magnitude m_o = 18.54 +/- 0.11. At a distance of 43 Mpc, the transient was discovered …

We report 3 SLSN and 2 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…

Photometric measurements of T CrB using LCO 0.4m network observatories: McDonald & Haleakala sites, with Bessel-V and Bessel-B photometric filters, and QHY600 imaging device.

We report the spectroscopic detection of a light echo from Type Ia Supernova 2021aefx at ~1200 days post maximum light using the Very Large Telescope.

Here we report the ATLAS discovery of the transient ATLAS25eca (AT2025ifq) in galaxy 2MASX J10170279-3816235 at magnitude m_o = 17.56 +/- 0.03. At a distance of 72 Mpc, the transient was discovered…

We report observations of the astrophysical neutrino candidate IC-250421A with the Large Array Survey Telescope (LAST). We cover part of the 90%-footprint neutrino localization and find ~60-days old …

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

This report includes classifications of two supernovae, a Type Ia and a superluminous Type IIn. We encourage followup observations.

We report 7 ZTF superluminous supernova candidates selected by our software filter and subsequent human vetting. In this sample, a typical rise time is longer than 30 days and a typical peak r-band m…

This report includes classifications of 2 Type Ia's supernovae. We encourage followup observations.

This report includes classifications of two supernovae, a Type Ia and a Type IIn. We encourage followup observations.

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…

This report includes classifications of 7 Type Ia's, 1 Type II, an AGN and a spectrum of a likely SN where strong galaxy emission inhibits a definitive classification. We encourage followup observati…

We have obtained an optical spectrum of SN 2025fwp, which shows it to be a young Type II supernova. The supernova exploded in the same galaxy as the Type Ia supernova SN 2019ako.

This report includes classifications of 4 Type Ia's, 1 Type II, 1 Type Ic and a CV

The BlackGEM Consortium announces the discovery of BGEM J132554.96-430603.3 / AT2025guz, a young (1 day limit), faint (q=20.15) transient located in the outskirts of the nearby giant elliptical galax…

This report includes classifications of 3 Type Ia supernova.

We report 2 SLSN candidates 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 ATLAS25dkq (AT2025gjc) in galaxy ESO 515- G 003 at magnitude m_c = 18.28 +/- 0.10. At a distance of 82 Mpc, the transient was discovered on MJD = 6…

We report 4 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…

We have obtained an optical spectrum of SN 2025dyr, which shows it to be a young Type II supernova. The supernova occurred in the same host galaxy as the Type Ia supernova SN 2023lhq.

We report the spectroscopic classification of 5 optical transients discovered/co-discovered by the Large Array Survey Telescope (LAST).

Here we report the ATLAS discovery of the transient ATLAS25cvu (AT2025fep) in galaxy ESO 138- G 021 at magnitude m_o = 17.19 +/- 0.06. At a distance of 67 Mpc, the transient was discovered on MJD = …

We report 2 SLSN candidates 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 ATLAS25cuv (AT2025ezt) in galaxy NGC 6919 at magnitude m_o = 18.14 +/- 0.14. At a distance of 78 Mpc, the transient was discovered on MJD = 60754…

Here we report the ATLAS discovery of the transient ATLAS25cug (AT2025evv) in galaxy ESO 263- G 035 at magnitude m_o = 18.55 +/- 0.18. At a distance of 61 Mpc, the transient was discovered on MJD = …

Here we report the ATLAS discovery of the transient ATLAS25ctw (AT2025eux) in galaxy MCG -02-52-013 at magnitude m_o = 17.94 +/- 0.15. At a distance of 77 Mpc, the transient was discovered on MJD = …

We report 2 SLSN candidates 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 ATLAS25cqk (AT2025efc) in galaxy ESO 565- G 019 at magnitude m_o = 17.45 +/- 0.12. At a distance of 71 Mpc, the transient was discovered on MJD = 6…

Here we report the ATLAS discovery of the transient ATLAS25cqi (AT2025efa) in galaxy ESO 443- G 016 at magnitude m_o = 18.19 +/- 0.16. At a distance of 70 Mpc, the transient was discovered on MJD = …

We announce the 2DTS: the DECam DESI Transient Survey, a new survey combining the efforts of DESIRT (DECam Search for Intermediate Redshift Transients) and the DESI (Dark Energy Spectroscopic Instrum…

Here we report the ATLAS discovery of the transient ATLAS25cof (AT2025dys) in galaxy 2MASX J10502184-2219183 at magnitude m_o = 18.87 +/- 0.17. At a distance of 58 Mpc, the transient was discovered …

We report a fast rising supernova candidate WFST0529iump (AT 2025dvo) discovered by the WFST deep high-cadence ugr-bands survey.

We report a fast rising transient candidate WFST0532hscl (AT 2025dug) discovered by the 2.5-m Wide Field Survey Telescope (WFST) during its deep high-cadence ugr-bands survey.

We report 3 SLSN, 2 TDE candidates, and an uncertain candidate from the ZTF public alert stream, identified by the NEEDLE classifier running on the Lasair alert broker. We encourage spectroscopic cla…

We have obtained an optical spectrum of SN 2025ctp, which shows it to be a Type IIb supernova at maximum light. The supernova occurred in the same galaxy as the Type Ia supernova SN 2016ys.

Here we report the joint ATLAS/BlackGEM discovery of the transient AT2025dhz (ATLAS25cji / BGEM J132606.24-425832.49) in the galaxy NGC5128 with an ATLAS cyan magnitude m_c = 19.36 +/- 0.2 and BlackG…