AstroNotes

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…

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 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 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 announce CATS150: the Complete Astronomical Transient Survey within 150 Mpc, a new ZTF survey designed to systematically classify explosive transients within the local Universe. CATS150 merges the…

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 = …

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.

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…

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.

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…