AstroNotes

We report the classification of AT 2025ukn as an Extreme Nuclear Transient (ENT), given AGN-like features in the spectrum and a long rise to ~-22 magnitude.

We report a Swift-XRT detection of X-ray emission from the off-nuclear IMBH–TDE candidate 2025abcr. The X-rays are luminous and ultrasoft, while contemporaneous Swift-UVOT photometry shows the source…

We report the classification of optical transient ZTF25abxvhmk/AT 2025abcr as a likely offnuclear tidal disruption event (TDE). Subsequent follow-up suggests a probable TDE-H-He classification. The l…

We report the detection of X-ray emission coincident with the nearby tidal disruption event TDE 2025aarm

We report the detection of radio emission coincident with the nearby tidal disruption event TDE 2025aarm.

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 report radio upper limits obtained at 5 and 8 GHz with the Allen Telescope Array for the nearby TDE 2025aarm.

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…

We report the classification of AT 2025aarm as a nearby pre-peak H+He TDE.

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…

We spectroscopically classify the optical transient AT2025aapf/ZTF25abxcnsf as a TDE-featureless at redshift z=0.180 using Keck-I/LRIS.

Here we report the ATLAS discovery of the transient ATLAS25nji (AT2025absv) in galaxy NGC 1578 at magnitude m_c = 18.82 +/- 0.13. At a distance of 86 Mpc, the transient was discovered on MJD = 60971…

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

We report on Keck/LRIS spectroscopy of the brightest image of SN2025wny (ZTF25abnjznp), a transient showing multiple images previously identified by the Zwicky Transient Facility and the Liverpool Te…

We report the classification of four optical transients (3 Type Ia SNe and one Type IIP).

We report the classification of four optical transients (3 Type Ia SNe and an AGN outburst). We additionally report a new spectrum for SN 2025zwn, consistent with a SN IIb.

We report spectroscopic observations of SN2025aarn classifying it as a young type II supernova, based on Balmer emission coincident with the host redshift. Polarimetry obtained is consistent with hig…

We report photometry, spectroscopy, and X-ray observations of a rapidly rising (>3 mag/day) and blue optical transient.

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…

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 report the ATLAS discovery of the transient ATLAS25msz (AT2025aant) in galaxy UGC 02885 at magnitude m_c = 18.42 +/- 0.11. At a distance of 84 Mpc, the transient was discovered on MJD = 6096…

We report a fast rising transient WFST251011tqbp (AT 2025aada) discovered by the 2.5-m Wide Field Survey Telescope (WFST) through the Deep High-cadence ugr-band Survey.

We report ZTF and LT observations of a fast and blue optical transient, AT2025zow (ZTF25abvalml).

We report the discovery of multiple images of the transient AT2025wny (ZTF25abnjznp/GOTO25gtq) in Liverpool Telescope IO:O imaging on UT 2025-10-03 and 2025-10-04. Image subtraction using Pan-STARRS …

We report one SLSN candidate 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 ATLAS25mgc (AT2025zgu) in galaxy MCG -01-10-035 at magnitude m_w = 18.80 +/- 0.15. At a distance of 57 Mpc, the transient was discovered on MJD = …

We report the classification of the 62 Mpc SN 2025xjd as a low luminosity Type Iax SN. Our spectra reveal low expansion velocities (v ~ 3,000 km/s and later v ~ 1,500 km/s) and a low peak absolute ma…

We report 5 SLSN and 3 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 ATLAS25lvv (AT2025yii) in galaxy NGC 2297 at magnitude m_c = 19.26 +/- 0.20. At a distance of 49 Mpc, the transient was discovered on MJD = 60941.3…

This report includes classifications of three Type Ia SNe, one Type Ic and one Type II SN.

We have obtained an optical spectrum of SNe 2025xxi, which shows it to be a Type II supernova. SN 2025xxi is the sibling of the Type II SN 2019dez.

This report includes classifications of one AGN and one type II SN.

This report includes classifications of 1 Type Ia SN, and 1 ambiguous SN. The spectrum of SN2025xzc is dominated by host galaxy lines, but some broad SN-like line features are present.

We classify the long-rising optical transient AT 2022aeys/ZTF22aaqccka as a likely AGN turn-on event in a quiescent host galaxy.

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.