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

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...

ATel 17894: Spectroscopic Classification of AT2026rwn with the Lick Shane Tel...

15 Jul 2026 at 8:16pm
We report the classification of the astrophysical transient 2026rwn from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2026 July 07 UT. ... Read more...


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