RATAN-600 is a radio telescope with a variable-profile circular antenna of 600 m in diameter, the largest Russian telescope, which performs mass measurements of galactic and extragalactic radio sources at frequencies of 1.2, 2.3, 4.7, 8.2, 11.2, and 22.3 GHz quasi-simultaneously (within 1-3 min). The main advantages of the instrument are high brightness-temperature sensitivity and multifrequency observations.
The figure shows multiwave radio emission scans - graphs of the distribution of intensity I and circular polarization V across the solar disk, obtained with RATAN-600. The color scale on the right corresponds to 80 wavelengths in the range from 1.65 cm to 10 cm. The upper left hand corner shows the date and time of obtaining the radio data (available on the page with a detailed information). Polarized emission V characterizes the magnetic-field strength in solar active regions.
The significant brightening of the flat spectrum radio quasar OP 313 (BZU J1310+3220, 4FGL J1310.5+3221) was recently been reported in gamma-ray (ATel #17167), near-infrared (ATel #17179) and optical bands (ATel #17173, #17184, #17185) over the past two weeks.
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In 2024 the enhanced gamma-ray activity from 3C 138, also known as 4FGL J0521.2+1637, was observed with the Fermi/LAT (Large Area Telescope) (ATel #16845).
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The KM3NeT experiment reported the detection of an ultra-high-energy neutrino with an energy estimate of ~ 220 PeV, the most energetic yet observed.
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Call for Proposals
Observational proposals are accepted via an interactive form twice a year: from February 1 to March 10 and from August 1 to September 10.