Strong Millimeter-Band Flaring of 3C454.3 Underway

Details Strong Millimeter-Band Flaring of 3C454.3 Underway Strong Millimeter-Band Flaring of 3C454.3 Underway

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2150....1g&link_type=abstract

The Astronomer's Telegram, #2150

Astronomy and Astrophysics

Astronomy

5

Millimeter, Sub-Millimeter, Request For Observations, Agn, Quasars

Scientific paper

The Submillimeter Array (SMA) performs ongoing flux density monitoring of quasars that are typically bright in the mm/submm bands, in order to optimally choose quasars for use as interferometric calibration sources. Through this monitoring effort, we report that the quasar 3C454.3 (J2253+161) is currently flaring strongly at millimeter wavelengths. After reaching 1.3 mm band flux densities of 27 +/- 1.8 Jy on October 3 2008, the quasar showed a substantial long term drop in intensity, reaching a measured nadir of 3 +/- 0.2 Jy on April 3, 2009 (though observations in 2009 are particularly sparse prior to May, and it is possible that the source dipped below 3 Jy during this time).

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