Occultation of a solar active region at 1.5 GHz during the eclipse of November 3, 1994

Occultation of a solar active region at 1.5 GHz during the eclipse of November 3, 1994

We observed the solar eclipse of November 3, 1994 with a 4-m diameter antenna and a radio spectrograph operating at $1.5 \pm 0.05 $ GHz with a time resolution of 100 ms. Here we present the observations of the occultation of the solar active region AR 7798 by the lunar limb. From the derivative of t...

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Veröffentlicht in:Astronomy and astrophysics (Berlin) 2006-03, Vol.447 (3), p.1121-1123
Hauptverfasser: Subramanian, K. R., Sawant, H. S., Fernandes, F. C. R., Cecatto, J. R.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Earth, ocean, space
Exact sciences and technology
Sun: activity
Sun: chromosphere
Sun: radio radiation
sunspots
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Zusammenfassung:We observed the solar eclipse of November 3, 1994 with a 4-m diameter antenna and a radio spectrograph operating at $1.5 \pm 0.05 $ GHz with a time resolution of 100 ms. Here we present the observations of the occultation of the solar active region AR 7798 by the lunar limb. From the derivative of the eclipse curve, we found a source with an angular size of $\approx $12 s of arc associated with this active region.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361:20052857