AstroNotes

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

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

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.

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.

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

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.

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 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 optical non-detection of AT2025dup.

We report on the optical photometric follow-up of SN2024adhf/Gaia25aao conducted with the BHTOM.space global telescope network.

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 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.

We report the spectroscopic observation of Type Ia SN 2025bvm in NGC 4156 at TNG (Telescopio Nazionale Galileo, La Palma)

We report the identification of a rapidly fading optical transient in ZTF observations. A Gemini North spectrum shows a featureless blue continuum. There is a catalogued galaxy 3” away with a photome…

We report 330 supernova candidates discovered by the 2.5-m Wide Field Survey Telescope (WFST) during the first two months of its deep high-cadence ugr-bands survey.

We report early photometric detections from the Wide Field Survey Telescope deep high-cadence ugr-bands survey of 14 previously reported supernova/candidates.

This report includes classifications of 4 Type Ia supernovae

This report includes classifications of 3 Type Ia's, 1 Type II and 1 Type IIb supernova. SN2025bco is an infant Type II, showing strong flash ionisation features. We encourage followup observations.

This report includes classifications of 3 SNe Ia, 1 SN II, 1 SN IIb and 1 Galaxy. AT2025ayw is probably a CV, given the blue spectrum without any broad SN-like features, no obvious host galaxy and lo…

This report includes classifications of 8 Type Ia's, 4 Type II's. and 1 Type Ia 91T-like SN.

This report includes classifications of 5 type Ia, 1 Ia-91T and 1 SN II. AT2025atd shows a blue continuum and no obvious broad SN features, and thus its spectral type is unclear. We encourage followu…

We report the rapid, autonomous spectroscopic follow-up of SNe 2025ay, 2025mg, 2025oq, and 2025aml enabled by BTSbot-nearby. In all cases, the spectra triggered by BTSbot-nearby are the earliest know…

The BlackGEM Consortium notes that the recently discovered AT2025ajq is located in the outskirts of the giant elliptical galaxy Centaurus A / NGC 5128

This report includes classifications of 3 Type Ia's and 1 young core-collapse SN.

This report includes classifications of 5 Type Ia's and 1 Type Ibn

This report includes classifications of 3 Type II's and 1 Galactic transient. SN2025et is most likely a 87A-like Type II in a dwarf galaxy.

This report includes classifications of 2 Type II's, 1 featureless transient of likely Galactic origin, and one re-classification of a previously blue and featureless transient to a SLSN

We report on the optical photometric follow-up of SN2024gy conducted with the BHTOM.space global telescope network.

This report includes classifications of 1 faint Type Iax, 1 Type Ic, one possible SLSN and one AGN.

BlackGEM discovery of possible young supernova in NGC 1398 with a 1.96 day explosion constraint.

This report includes classifications of 2 Type Ia's and 1 Type II. We encourage followup observations.

We report the classification of the most recent outburst of AT2024xuo as a likely interacting SNIIn.

We report on the optical photometric follow-up of SN2024ggi conducted with the BHTOM.space global telescope network.

This report includes classifications of 1 Type IIn and 1 Ib/c. We encourage follow-up observations.

This report includes classifications of 3 Type Ia's. We encourage follow-up observations.

This report includes classifications of 3 Type Ia's, 1 Type Ibn and 1 Type II. We encourage follow-up observations.

We have obtained an optical spectrum of SN 2025gc, which shows it to be a Type Ic supernova exhibiting SN 1998bw-like features, about a month after maximum light. The supernova occurred in the same g…

We report that the transient AT2024tvd is an off-nuclear tidal disruption event.

This report includes classifications of 4 Type Ia's. We encourage follow-up observations.

This report includes classification of 1 AGN and 1 Type II SN. We encourage follow-up observations.

This report includes classifications of 6 Type Ia's. We encourage follow-up observations.

This report includes classifications of 1 Type Ia and 1 SLSN-II. We encourage follow-up observations.

This report includes classifications of 3 Type Ia's, 1 Type IIb, 1 Type II and 1 SN. We encourage follow-up observations.