The Astronomer's Telegram

158 articles in the TruthFoundry index. Each links out to the original.

• New outburst of black hole binary GX 339-4 detected with LCO telescopes · Astronomers report a fresh outburst of the recurrent black hole system GX 339-4.
• Optical polarization measurements published for comet C/2026 A2 (Bok) · Astronomers report polarimetric observation results for long-period comet C/2026 A2 (Bok).
• Optical coronal lines detected in nova V488 Sge 2026 observations · ARAS astronomers report coronal line detection in V488 Sge nova spectroscopic data.
• MAXI J1609-487 X-ray transient detected undergoing rebrightening event · MAXI/GSC instrument recorded X-ray rebrightening of transient source MAXI J1609-487 on 2026-10-31.
• Einstein Probe WXT detects X-ray brightening from QSO B2344+514 · Einstein Probe WXT observed increased X-ray flux from quasar QSO B2344+514.
• Keck Observatory captures near-infrared imaging of interstellar comet 3I/ATLAS · Astronomers published MOSFIRE near-infrared observations of interstellar comet 3I/ATLAS.
• Gemini North conducts IFU spectroscopy of interstellar comet 3I/ATLAS · Astronomers published spectroscopy results for interstellar comet 3I/ATLAS.
• XMM-Newton observes nova V488 Sge during super-soft emission phase · Astronomers publish XMM-Newton observations of nova V488 Sge during its super-soft phase.
• Gemini North observes interstellar comet 3I/ATLAS dust and gas February 2026 · Astronomers published Gemini North GMOS observations of interstellar comet 3I/ATLAS.
• GREENBURST collaboration detects new fast radio burst FRB 20261029A · GREENBURST detected fast radio burst FRB 20261029A using the Green Bank Telescope.
• Keck Spectroscopy Maps Coma Of Interstellar Comet 3I/ATLAS · Astronomers publish 2026 Keck observation results for interstellar comet 3I/ATLAS.
• SPHEREx observations confirm dust formation in nova V572 Velorum · Astronomers confirm dust formation in nova V572 Velorum using SPHEREx observatory data.
• Gemini South observes coma and tail of interstellar comet 3I/ATLAS · Astronomers publish September 2025 multiband imaging results for comet 3I/ATLAS.
• Nova V488 Sge observed forming dust via infrared telescope measurements · Astronomers detect dust formation on nova V488 Sge using near-infrared photometry.
• Fermi-LAT detects gamma-ray emission from Galactic Nova V8056 Sgr · Researchers report Fermi-LAT gamma-ray detection of recently discovered nova V8056 Sgr
• XRISM XTS detects X-ray flares likely originating from star CD-61 901 · XRISM Xtend Transient Search detected X-ray flares consistent with variable star CD-61 901
• CN and Ni I emission detected in 3I/ATLAS comet Keck spectra · Astronomers report CN and Ni I emission in 2025 Keck spectra of interstellar comet 3I/ATLAS.
• Nova V572 Vel shows measured 11-minute X-ray period change over two months · Astronomers document a significant period shift in nova V572 Vel X-ray observations.
• Keck Observatory captures near-infrared imaging of interstellar comet 3I/ATLAS · Astronomers published Keck/MOSFIRE observations of interstellar comet 3I/ATLAS from 2025 July 11.
• MAXI/GSC detects new uncatalogued X-ray transient MAXI J1609-487 · MAXI/GSC instrument detected a new bright X-ray transient on 28 October 2026.
• Nova Tau 2026 steep brightness decline indicates active dust formation · Astronomers confirm Nova Tau 2026 is forming dust after exiting its brightness plateau.
• Keck II KCWI observations classify multiple astrophysical transient events · Astronomers published spectroscopic classifications for 9 astrophysical transients using Keck II KCWI.
• MeerKAT observes neutron star XTE J1810-189 during October 2026 outburst · Astronomers conducted MeerKAT radio observations of XTE J1810-189 during its 2026 outburst.
• Fermi-LAT records historic maximum gamma-ray activity from PKS 0521-36 · Fermi-LAT detected the highest ever gamma-ray flux from source PKS 0521-36 on 22 Oct 2026.
• Very Large Array detects radio emission from outbursting neutron star XTE J1810-189 · Astronomers detected radio flux from XTE J1810-189 during its 2026 outburst using the VLA.
• TRAPPIST telescope measures production rates for three comets · TRAPPIST-North observed three comets and published gas and dust production rates.
• Betelgeuse 2026 dimming halted at magnitude 1.0 mid October 2026 · Astronomers confirm Betelgeuse 2026 dimming stopped at magnitude 1.0 in mid October.
• NuSTAR detects thermonuclear X-ray burst from XTE J1810-189 during 2026 outburst · Astronomers observed a thermonuclear X-ray burst on XTE J1810-189 October 2026 outburst
• Astronomers classify transient AT 2026abza using Lick Shane Telescope · Researchers publish spectroscopic classification of astronomical transient AT 2026abza.
• XRISM XTS detects X-ray flare with possible 1eRASS catalog counterpart · XRISM/Xtend Transient Search detected an X-ray flare on 2026-10-08 with a catalog candidate source.