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Astronomerstelegram?rss: The Astronomer's Telegram

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Message History

ATel 17957: LHAASO-WCDA Detection of Strong TeV Flaring Activity from the Radio Galaxy NGC 1275
We report the detection of very-high-energy (VHE, E > 100 GeV) gamma-ray emission from the radio galaxy NGC 1275 (3C 84,z = 0.017) with the Large High Altitude Air Shower Observatory (LHAASO) - Water Cherenkov Detector Array (WCDA). ...

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ATel 17956: Magnitudes and colors of comet 220P/McNaught during outburst
Following the CBET 5722 we observe the comet 220P/McNaught in BVRI broadband filters, between 01:01 & #247 02:01 UT on 2026-Aug-08 with the 50/70cm Schmidt Telescope of National Astronomical Observatory Rozhen, Bulgaria. ...

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ATel 17955: NGC 1275 is presently in an exceptionally bright state in the optical as well
NGC 1275 (also 3C 84, S4 0316+41) at RA = 03 19 48.156 and Dec = +41 30 42.109 in the ICRS=J2000 coordinate system; z = 0.0168 (data from the Simbad Astronomical Database) reached an extreme brightness last night with an optical magnitude of 12.713 & #177; 0.002 in the R band. ...

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ATel 17954: Optical spectroscopy of TCP J02191736+2857158 and TCP J20354364+6131329
We report optical spectroscopy of two WZ Sge-type novae TCP J02191736+2857158 and TCP J20354364+6131329. The observations were carried out using the ALFOSC imager and spectrograph mounted on the Nordic Optical Telescope (NOT), located in Roque de los Muchachos, La Palma, Spain. ...

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ATel 17953: Spectroscopic Classifications of Optical Transients with the Lick Shane telescope
We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. The targets were supplied by Pan-STARRS and GOTO. ...

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