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High cadence observations of a global coronal wave by EUVI/STEREO
Astrid M. Veronig, Manuela Temmer, Bojan Vrsnak
We report a large-scale coronal wave (so-called "EIT wave") observed with high cadence by EUVI onboard STEREO in association with the GOES B9.5 flare and double CME event on 19 May…
Spatial restriction to HXR footpoint locations by reconnection site geometries
M. Temmer, B. Vrsnak, A. Veronig +1
It is assumed that HXR sources map to the primary energy release site in flares where particle acceleration occurs. Strong HXR sources are mostly observed at confined regions along…
Interaction of a Moreton/EIT wave and a coronal hole
Astrid M. Veronig, Manuela Temmer, Bojan Vrsnak +1
We report high-cadence H-alpha observations of a distinct Moreton wave observed at Kanzelhoehe Solar Observatory associated with the 3B/X3.8 flare and CME event of 2005 January 17.…
Hemispheric Sunspot Numbers R_n and R_s: Catalogue and N-S asymmetry analysis
M. Temmer, A. Veronig, A. Hanslmeier
Sunspot drawings are provided on a regular basis at the Kanzelhoehe Solar Observatory, Austria, and the derived relative sunspot numbers are reported to the Sunspot Index Data Cent…
The Neupert effect in solar flares and implications for coronal heating
A. Veronig, B. Vrsnak, B. R. Dennis +3
Based on simultaneous observations of solar flares in hard and soft X-rays we studied several aspects of the Neupert effect. About half of 1114 analyzed events show a timing behavi…
Relative timing of solar flares observed at different wavelengths
A. Veronig, B. Vrsnak, M. Temmer +1
The timing of 503 solar flares observed simultaneously in hard X-rays, soft X-rays and H-alpha is analyzed. We investigated the start and the peak time differences in different wav…
Statistical analysis of solar H-alpha flares
M. Temmer, A. Veronig, A. Hanslmeier +2
A statistical analysis of a large data set of H-alpha flares comprising almost 100000 single events that occurred during the period January 1975 to December 1999 is presented. We a…
Temporal aspects and frequency distributions of solar soft X-ray flares
A. Veronig, M. Temmer, A. Hanslmeier +2
A statistical analysis of almost 50000 soft X-ray (SXR) flares observed by GOES during the period 1976-2000 is presented. On the basis of this extensive data set, statistics on tem…
Investigation of the Neupert effect in solar flares. I. Statistical properties and the evaporation model
A. Veronig, B. Vrsnak, B. R. Dennis +3
Based on a sample of 1114 flares observed simultaneously in hard X-rays (HXR) by the BATSE instrument and in soft X-rays (SXR) by GOES, we studied several aspects of the Neupert ef…