AstroNotes

We report an FBOT candidate WFST250715cmaa (AT 2025sbr) discovered by the WFST survey.

We report photometric and spectroscopic ToO observations of the possible rebrightening of SN 2024pba.

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…

This report includes classifications of 15 Type Ia's, including 1 Ia-peculiar and 1 Ia-CSM, 1 Type Ib, 2 Type Ic, 1 Type IIb and 1 blue continuum.

The BlackGEM consortium announces the discovery of the young transient BGEM J132508.95-430244.3/AT2025rza, 4 arcminutes away from the center of the giant elliptical galaxy Centaurus A. In the latest…

This report includes classifications of 7 Type Ia's and 1 SN (Blue continuum with narrow emission Halpha line).

We report the discovery of a bright optical transient coincident with the position of SN 2024pba, approximately 1.2 mag brighter than SN 2024pba itself.

We report the spectroscopic classification of 2025qhf (ZTF25aaymnha) as a TDE-H-He event at z=0.08. At this distance, 2025qhf has a current luminosity M = -18.88 +/- 0.07 and does not yet appear to h…

The BlackGEM and GOTO collaborations announce the discovery of AT2025rtk in the emission-line galaxy ESO073-027 at z=0.02 at q=18.8/L=19.02. The host galaxy is also the host of AT2024afbw, discovered…

This report includes classifications of two Type Ia SNe, one 91T-like SN Ia, one Type II supernova, and a variable star. All classifications were performed based on observations taken during the ESO …

This report includes classifications of five Type Ia SNe, one 91T-like SN Ia, one Type II supernova, and a galaxy. All classifications were performed based on observations taken during the ESO Summer…

This report includes classifications of 3 new Type II SNe and a reclassification of a supernova as Type II, which were done through observations taken in the course of the ESO Summer Research Program…

We report 2 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 discovery of 18 transient/variable sources in the Abell 2744 field associated with host galaxies at redshifts z = 0.30-2.66. We discovered these sources through an archival search by co…

SN 2025pht (ASASSN-25cw) was discovered by K. Z. Stanek and spectroscopically classified as a SN IIP by J. Strader. The host galaxy, NGC 1637, at a redshift of z = 0.002392 has extensive archival HS…

This report includes classifications of 5 Type Ia's, 1 Type Ia-91T, 3 Type II's, and 1 Galaxy spectrum.

This report includes classification of one Type Ia 91T-like supernova.

We report on the discovery of a possible SN in the nearby galaxy NGC 7331 at 13.6 ± 2.6 Mpc with GOTO L-band magnitude of 17.07 ± 0.03 AB mag at 14-07-2025 03:22:35 UTC. Assuming the host distance, t…

We report the classifications of the optical transients ZTF25aaxdtdm/AT2025own and ZTF25aaooewz/AT2025iuh as tidal disruption events (TDEs). The sources were selected by the tdescore ML classifier (S…

Here we report the ATLAS discovery of the transient ATLAS25hnz (AT2025qzy) in galaxy SDSS J120634.98+625915.6 at magnitude m_w = 18.50 +/- 0.13. This is the first candidate supernova to be submitted …

This report includes classifications of a Ia-CSM and a SN Ia.

We report the rapid, automatic UV/optical follow-up of the young Type II SN 2025qtt at d=38.5 Mpc, including Swift/UVOT observations starting just 6 minutes after its discovery by BTSbot-nearby. Our …

We report the BTSbot-nearby discovery and follow-up of SN 2025qpk, a young Type Ia SN at z=0.01377. BTSbot-nearby autonomously triggered Swift using the new urgency 0 mode, which enabled the Swift ob…

We report 2 hostless candidates selected by the ELEPHANT pipeline.

Here we report the ATLAS discovery of the transient ATLAS25gxh (AT2025qge) in galaxy ESO 136- G 007 at magnitude m_o = 18.88 +/- 0.18. At a distance of 79 Mpc, the transient was discovered on MJD = …

Here we report the ATLAS discovery of the transient ATLAS25gxg (AT2025qgd) in galaxy NGC 3256 at magnitude m_o = 17.09 +/- 0.06. At a distance of 37 Mpc (redshift independent, from NED), the transie…

We report the discovery of 3 extragalactic transient candidates found in Vera C. Rubin Observatory data released as part of the Rubin Data Preview 1. We also flag 8 sources coincident with transient …

We report 3 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.

As part of the ongoing development of a SLSN identification pipeline for the Fink collaboration, we have identified AT 2021aeuj (ZTF19adcddzk) as being a candidate Extreme Nuclear Transients (ENT).

We report observations of the optical transient AT2025mkn, first detected by ZTF on 2025-05-25 and independently reported by ATLAS. The transient, offset by 0.83″ from a red galaxy at z = 0.42, exhib…

We report on the optical photometric follow-up of SN2025coe with RAPAS, a ProAm network using telescopes equipped with a set of filters meeting Gaia photometric bands.

We report six ZTF superluminous supernova candidates selected by our software filter and subsequent human vetting.

Here we report the ATLAS discovery of the transient ATLAS25grb (AT2025plf) in galaxy UGC 12454 at magnitude m_o = 18.77 +/- 0.14. At a distance of 61 Mpc, the transient was discovered on MJD = 60856…

Here we report the ATLAS discovery of the transient ATLAS25gpw (AT2025pjt) in galaxy LCRS B125653.7-115043 at magnitude m_c = 18.70 +/- 0.10. At a distance of 92 Mpc, the transient was discovered on…

Here we present a classification of AT2025kkb/ZTF25aaofttb as a superluminous supernova (SLSN), with an apparent peak magnitude of m_g = 19.4, a K-corrected peak absolute magnitude of M_g = -22.8, an…

We observed AT2025ngt with Swift, detecting the transient in all the UVOT filters but not in the X-rays.

We report the results of a systematic search for transient sources in the first publicly released image from the Vera C. Rubin Observatory’s LSST, using cross-matching with the Transient Name Server …

We present spectroscopy of the fast-rising optical transient AT2025ngt, showing it to be a peculiar Type Ic-BL supernova.

Here we report the ATLAS discovery of the transient ATLAS25gfb (AT2025ois) in galaxy UGC 00339 NED01 at magnitude m_o = 18.56 +/- 0.30. At a distance of 52 Mpc, the transient was discovered on MJD =…

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 ZTF observations of a fast, luminous, and blue transient, AT2025ngt (ZTF25aaurzyo). The spectroscopic redshift of the host galaxy is z = 0.097, implying a peak absolute extinction-corrected…

We report the detection of the AT2018cow-like source AT2024aehp with the radio telescope AMI-LA at 15.5 GHz.

Here we report the ATLAS discovery of the transient ATLAS25gey (AT2025nwy) in galaxy 2MASX J21173698-2247338 at magnitude m_o = 16.94 +/- 0.06. At a distance of 105 Mpc, the transient was discovered…

Here we report the ATLAS discovery of the transient ATLAS25gfe (AT2025nzi) in galaxy NGC 4615 at magnitude m_c = 19.02 +/- 0.15. At a distance of 65 Mpc, the transient was discovered on MJD = 60844…

This report includes classifications of 7 Type Ia's, 5 Type II's., 1 Type Ic, 2 featurless SN, a CV and a Nova. We encourage followup observations.

Here we report the ATLAS discovery of the transient ATLAS25gdu (AT2025noo) in galaxy CGCG 241-092 at magnitude m_o = 19.01 +/- 0.19. At a distance of 85 Mpc, the transient was discovered on MJD = 60…

Here we report the ATLAS discovery of the transient ATLAS25gde (AT2025nno) in galaxy UGC 12720 at magnitude m_o = 18.44 +/- 0.15. At a distance of 71 Mpc, the transient was discovered on MJD = 60840…

Here we report the ATLAS discovery of the transient ATLAS25gbx (AT2025nkf) in galaxy NGC 3040 NED01 at magnitude m_o = 18.5 +/- 0.15. At a distance of 101 Mpc, the transient was discovered on MJD = …

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…