AstroNotes

We report the discovery and classification of the optical transient ZTF25aafwfzz/AT2025cyh as a possible tidal disruption event (TDE). The source was selected by the tdescore ML classifier (Stein+202…

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 = …

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…

We report the spectroscopic classification of 2025ccg (ZTF25aafywpr) as a TDE-He event at z=0.20. At this distance, 2025ccg has a current luminosity M = -21.2+/-0.2 and does not yet appear to have re…

Here we report the ATLAS discovery of the transient ATLAS25cik (AT2025dge) in galaxy SDSS J105814.19+612343.1 at magnitude o = 19.15 +/- 0.14. At a distance of 95 Mpc, the transient was discovered on…

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

We report the classification of optical transient ZTF25aacnkte/AT2025axp as a tidal disruption event (TDE) at z = 0.1045, due to its light curve evolution, lack of cooling, and spectral features, inc…

We report 2 hostless candidates selected by the ELEPHANT pipeline.

Here we report on the classifications of 7 Type Ia supernovae and one transient that only shows blue continuum.

We report 4 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…

ZTF classification of AT2025bpq/ZTF25aafofmu as a type IIn supernova

Here we report the ATLAS discovery of the transient ATLAS25bxt (AT2025cly) in galaxy UGC 08688 at magnitude m_o = 19.20 +/- 0.17. At a distance of 21 Mpc, the transient was discovered on MJD = 60729…

We report the SOAR classification of 2025cfc as a Type II SN at redshift z=0.0098 with flash features.

We report the classification of optical transient ZTF25aafofcs/AT2025bri 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 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 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 ATLAS25bux (AT2025cem) in galaxy IC 3029 at magnitude m_o = 19.21 +/- 0.20. At a distance of 99 Mpc, the transient was discovered on MJD = 60726.4…

This report includes a spectrum to support the previous classification of this transient by the DEBASS group. The object is spectroscopically consistent with young Type II SNe.

Here we report the ATLAS discovery of the transient ATLAS25brn (AT2025bxe) in galaxy IC 1715 at magnitude m_o = 18.88 +/- 0.19. At a distance of 60 Mpc, the transient was discovered on MJD = 60720.2…

Here we report the ATLAS discovery of the transient ATLAS25bqt (AT2025bvm) in galaxy NGC 4156 at magnitude m_o = 18.67 +/- 0.10. At a distance of 80 Mpc, the transient was discovered on MJD = 60723…

Here we report the ATLAS discovery of the transient ATLAS25bok (AT2025boc) in galaxy ESO 356- G 009 at magnitude m_o = 18.33 +/- 0.20. At a distance of 88 Mpc, the transient was discovered on MJD = …

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.

Here we report the ATLAS discovery of the transient ATLAS25bne (AT2025bcn) in galaxy ESO 325- G 042 at magnitude m_o = 18.07 +/- 0.10. At a distance of 56.6 Mpc, the transient was discovered on MJD…

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…

We report the classification of optical transients ZTF24abwsfdk/AT 2024admt and ZTF25aabebve/AT 2024agqx as tidal disruption events (TDEs). Both sources were selected by the tdescore ML classifier (S…

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

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 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…

We report the classifications of 4 Type Ia's and 1 Type II.

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

We report observations of 14 transients using the Shane Kast spectrograph at the Lick observatory on the nights of 2025-01-23 and 2025-01-24. New classifications were found for 10 objects, which incl…

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.

Here we report the ATLAS discovery of the transient ATLAS25awc (AT2025adj) in galaxy KUG 1458+516 at magnitude m_o = 17.25 +/- 0.04. At a distance of 48 Mpc, the transient was discovered on MJD = 606…

We report 12 ZTF superluminous supernova candidates selected by our software filter and subsequent human vetting. In this sample, a typical rise time is longer than 20 days and a typical peak r-band …

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 4 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…

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

We report 2 hostless candidates selected by the ELEPHANT pipeline.

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