The Astronomer’s Telegram is a system for reporting and commenting on new astronomical observations. The latest reports are listed here.

ATel 17925: Spectroscopic Classifications of Optical Transients with the Lick...

25 Jul 2026 at 4:43am
We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. The targets were supplied by GOTO and the Zwicky Transient Facility (ZTF). ... Read more...

ATel 17917: Erratum to ATel #17910

21 Jul 2026 at 10:16am
In ATel #17910, the designation of the reported nova candidate should be M31N 2026-07b, as this is the second nova candidate discovered in July 2026. Read more...

ATel 17914: Independent Discovery of a Probable Nova in M31, AT 2026vdo

20 Jul 2026 at 7:10pm
We report the discovery of a probable nova found during our survey of the central region of M31. The object was discovered on a co-added 1320-s R-band CMOS frame taken on 2026 Jul. ... Read more...

ATel 17912: Tomo-e Gozen Discovered a Large-Amplitude CV

20 Jul 2026 at 3:32pm
We discovered a large-amplitude CV, TCP J20354364+6131329, in Cepheus at 14.41 & pm; 0.02 mag on 2026-07-20.5443 UT (unfiltered) by the Tomo-e Gozen transient survey (Sako et al. ... Read more...

ATel 17910: Independent Discovery of a Probable Nova in M31

20 Jul 2026 at 11:54am
We report independent discovery of a probable nova in M31 (designated M31N 2026-07a) on R-band CCD images taken on 2026 July 19.9993 UT with the 50/70 Schmidt telescope at Rozhen NAO, Bulgaria. ... Read more...

ATel 17906: Gaia24amv: SU UMa-type dwarf nova near the period gap

19 Jul 2026 at 12:15pm
We report the results of photometric observations of the cataclysmic variable Gaia24amv/ZTF18ablqsov/AT2019dkz obtained during its 2026 June-July superoutburst. ... Read more...

ATel 17905: Photometric observations of Gaia16adj/ASASSN-14eg in superoutburst

17 Jul 2026 at 7:14pm
We identified Gaia16adj/ASASSN-14eg/AT2016dre as a promising candidate SU UMa-type dwarf nova during our analysis of cataclysmic variables selected for long-term monitoring. ... Read more...

ATel 17902: Spectroscopic Classification of Astrophysical Transients with the...

16 Jul 2026 at 10:30pm
We report the classifications of astrophysical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2026 July 16 UT. ... Read more...

ATel 17900: Evolution of Nova Aql 2026 (V2104 Aql) from discovery to the t2 p...

16 Jul 2026 at 3:02pm
The transient AT 2026rdg (discovered via ZTF by M. Ning and H. Lin at g = 14.45 mag on July 1.305 UT) was classified in ATel #17867 and #17868 as a highly reddened FeII-type nova, which was consequently designated as Nova Aql 2026 = V2104 Aql in CBET #5711. ... Read more...

ATel 17896: SN 2026sqf: upper limits from an IceCube neutrino search

15 Jul 2026 at 9:26pm
The IceCube Collaboration (http://icecube.wisc.edu/) reports: IceCube has performed a search for track-like muon neutrino events arriving from the direction of SN 2026sqf following the report from BHTOM (AstroNote: https://www.wis-tns.org/astronotes/astronote/2026-214), in a time range of six d... Read more...


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