Two White Light Flares in AR10486 observed by the GONG instruments

Details Two White Light Flares in AR10486 observed by the GONG instruments Two White Light Flares in AR10486 observed by the GONG instruments

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0212h&link_type=abstract

American Astronomical Society Meeting 204, #02.12; Bulletin of the American Astronomical Society, Vol. 36, p.669

Astronomy and Astrophysics

Astronomy

Scientific paper

The GONG (Global Oscillation Network Group) program operates a worldwide network of six instruments, primarily intended to give continuous Doppler velocity images of the full solar disk for helioseismology. The instruments also produce images in magnetic field strength, total intensity and line depth for a 1Å band centered on the Ni I (6768 Å) line, all at 60 second cadence with a spatial resolution of around 2 arcsecond. The X10 flare of 2003 October 29 and the X8.3 flare of 2003 November 2 both produced clear signatures in the GONG images, with local 20 to 30 per cent enhancements in the total intensity and a 50 per cent drop in the line strength, indicating the presence of white light emission. There are also both transient and persistent changes in the magnetic field.
This work was supported by NASA and NSF.

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