Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23..173f&link_type=abstract
Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 173-174
Astronomy and Astrophysics
Astronomy
Scientific paper
The Brazilian Solar Spectroscope (BSS) is in operation at INPE, in conjunction with a 9-m diameter antenna. BSS operates in the decimetric frequency range (1000-2500 MHz) with high temporal (10-1000 ms) and spectral (3 MHz) resolutions and the absolute timing accuracy of less than 3 ms. Data can be digitized up to 100 frequency channels. From March 2002, a couple of solar flares were simultaneous observed in X-rays by the "Ramaty High Energy Solar Spectroscopic Imager" (RHESSI) satellite and in radio frequencies by the BSS and by the Ondrejov Solar Spectrographs (OSS). These flares have been selected for multi-spectral investigations. The limb flare observed on April 4th, 2002, around 15: 28 UT was investigated. Hard X-ray and high frequency decimetric narrow-band ( < 200 MHz) type III-like radio bursts have been observed in association with the impulsive phase of this flare. The analysis of the RHESSI X-ray images indicates that the flare occurred behind the south-east solar limb (~ 6o). The estimated occultation height was ~4000 km. The X-ray spectrum (8-30 keV) was consistent with a power-law slope with a negative exponent of ~6. These results are presented and discussed. Moreover, we complement the analysis of the flare of 4th April, 2002, by including studies of correlation between radio structures and X-ray emission. A possible connection with the plasmoid injection is also investigated, since the observation of the limited frequency slowly drifting structures, as recorded by BSS and OSS, is an evidence that the type III-like bursts were generated inside the plasmoid.
Andrade M. C.
Cecatto José R.
Fernandes Francisco Carlos Rocha
Kane Sharad R.
Karlicky Marian
No associations
LandOfFree
Investigation of april 4th, 2002 solar flare observed simultaneously in X-rays and decimetric wavelengths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Investigation of april 4th, 2002 solar flare observed simultaneously in X-rays and decimetric wavelengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigation of april 4th, 2002 solar flare observed simultaneously in X-rays and decimetric wavelengths will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1665747