AstroNotes

We present Keck LRIS spectroscopy and LT IO:O photometry of the transient AT2026dbl. The transient was first detected on MJD 61085.35 by ZTF, displaying a magnitude of g ~ 18.7 and a colour of g - r …

Here we report the ATLAS discovery of the transient ATLAS26bty (AT2026dez) at magnitude m_o = 18.99 +/- 0.19 on MJD = 61084.31 (2026-02-13.31). The transient is significantly offset from the E-S0 gal…

We obtained VLT/X-shooter spectroscopy of the rapidly evolving transient AT2026cha on 2026-02-13, finding that the continued evolution is consistent with the Ic-BL classification of Astronote #2026-3…

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 two possible TDEs identified by our photometric classifier POTICA (Photometric Optical TDE Identification and Classification Annotator). We encourage classification and follow-up of these o…

We report the tentative classification of the rapidly evolving transient AT2026cha as a Type Ic-BL supernova.

We report optical spectroscopic classification of three SNe (Type 1a), one AGN, and one Unknown (blue featureless spectrum). Observations were taken with the EFOSC2 spectrograph at the ESO New Techno…

We report photometry and spectroscopy of a rapidly rising (>1.5 mag/day) and blue optical transient located close in projection to a z=0.04 dwarf galaxy.

We report the spectroscopic follow-up of the young Type II SN2026cff with the EFOSC2 spectrograph at the ESO NTT telescopes. Spectra were obtained during the nights of 2026 Feb. 08, 09 and 10. Observ…

We report on the optical multiband photometric follow-up of a Type-I Supernova SN2025ahsa conducted with the BHTOM.space Global Telescope Network.

We report optical spectroscopic classification of two SNe (type Ia and II). Observations were taken with the EFOSC2 spectrograph at the ESO New Technology Telescope (NTT) during the night of 2026 Feb…

We report optical spectroscopic classifications of SN2026cff as a young Type II SN in NGC 3660 (59.78 Mpc), probably within a few days after explosion. The spectrum shows a blue continuum with a few …

Here we report the ATLAS discovery of the transient ATLAS26bkn (AT2026chx) in galaxy LEDA 2429296 at magnitude m_o = 18.82 +/- 0.17. At a distance of 92 Mpc, the transient was discovered on MJD = 61…

We report 1 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.

We report on the optical multiband photometric follow-up of classical nova ASASSN-25fd conducted with the BHTOM.space Global Telescope Network.

We report on the optical multiband photometric follow-up of AT2025abao conducted with the BHTOM.space Global Telescope Network.

We report the discovery of the transient AT 2025alrm by WFST. Its optical spectroscopic properties and Swift observations are consistent with those of TDE-H+He. Therefore, we tentatively classify it …

Here we report the ATLAS discovery of the transient ATLAS26bie (AT2026cbh) in galaxy UGC 00117 at magnitude m_o = 17.43 +/- 0.11. At a distance of 70 Mpc, the transient was discovered on MJD = 61074…

We report 2 hostless candidates selected by the ELEPHANT pipeline.

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.

We report near-IR spectroscopic observations of SN 2026bgd (first reported in AstroNote 2026-15) revealing the transient is a young Type Ia supernova. Observations were taken with the TripleSpec spec…

We report the ATLAS discovery of the transient AT2026bgd at magnitude m_c = 18.21 +/- 0.09 on MJD 61064.35. The transient was not detected 1 day prior on MJD 61063.37, at a limiting magnitude of m_c …

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 the classification of SN 2026ayt as a likely young type II supernova in UGCA 165 at ~16 Mpc.

We observed AT 2026ayt (ATLAS26ayq) with the Lulin One-meter Telescope at Lulin Observatory, Taiwan. Our data confirm a rise of ~ 0.5 mag within one day of discovery. From the multi-band photometry, …

We report the ATLAS discovery of the transient AT2026ayt, possibly associated with the nearby, irregular galaxy UGCA 165. The discovery magnitude is m_o = 16.24 +/- 0.02, discovered on MJD 61060.91. …

We report two possible TDEs identified by our photometric classifier POTICA (Photometric Optical TDE Identification and Classification Annotator). Both objects are distinctly blue and still on the ri…

We report two epochs of r and i band photometry of the transient 2025iek, which may be associated with an AGN flare rather than a supernova.

We report 3 hostless candidates selected by the ELEPHANT pipeline.

We spectroscopically classify the optical transient AT2025aljd/ZTF25aclckzl as a TDE at redshift z=0.150 using the Shane 3 m telescope at Lick Observatory.

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…

Using new Las Cumbres spectroscopy, we re-classify the transient AT 2025afsj as a Bowen Fluorescence Flare (BFF). This constitutes the third robust example of a BFF reported to occur in a previously …

Here we report the ATLAS discovery of the transient ATLAS26anf (AT2026acd) in galaxy NGC 4168 at magnitude m_o = 18.88 +/- 0.14. At a distance of 32 Mpc, the transient was discovered on MJD = 61054…

Here we report the ATLAS discovery of the transient ATLAS26afg (AT2026ob) in galaxy NGC 0134 at magnitude m_o = 18.26 +/- 0.13. At a distance of 18 Mpc, the transient was discovered on MJD = 61051.2…

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 report the possible detection of the TDE 2025CYH with the radio telescope AMI-LA at 15.5 GHz.

Here we report the ATLAS discovery of the transient ATLAS25qko (AT2025ajmj) in galaxy IC 4366 at magnitude m_o = 18.06 +/- 0.14. At a distance of 68 Mpc, the transient was discovered on MJD = 61038.3…

We report the optical spectroscopic and Swift observations of AT 2025afsj and tentatively classify it as a TDE in AGN.

We report Keck/LRIS spectroscopy of SN 2025anhj, a Type Ibn supernova discovered by the Zwicky Transient Facility (ZTF25acipmxl). The classification is based on weak He I P-Cygni features, residual C…

Here we report the ATLAS discovery of the transient ATLAS25qaf (AT2025ahuw) in galaxy KK 2852 at magnitude m_c = 18.16 +/- 0.11. At a distance of 49 Mpc, the transient was discovered on MJD = 61029…

We report the discovery of a highly reddened transient in Messier 108 (9 Mpc) and classify it as a low luminosity Type Iax. With Gemini/GMOS spectroscopy, we measure low expansion velocities (v

We report 3 hostless candidates selected by the ELEPHANT pipeline.

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…

We report the optical spectroscopic and Swift observations of TDE 2025afvr which is still in rising phase in optical band.

We report two possible TDEs identified by our photometric classifier POTICA (Photometric Optical TDE Identification and Classification Annotator), currently in its testing phase. The lightcurve of …

We present a NOT/ALFOSC optical spectrum of the rising optical transient AT 2025afvr. The spectrum is blue and featureless. There are no evident host galaxy lines and no spectroscopic redshift for th…

We report 20 supernova candidates with magnitudes down to ~30.4 AB mag collected from the NGDEEP (PI: Finkelstein; PID: 2079) survey data. They are hosted by galaxies with redshifts ranging from z=0…

We report 4 supernova candidates with magnitudes down to ~30.2 AB mag in the GOODS-S field hosted by galaxies with redshifts z=0.342, z~2.55, z~2.92, and one of unknown redshift. We found these sourc…