Search

Start Over Creator Fárník, F.

2. Long-lasting X-ray emission from an active region

Creator:
Křivský, L., Fárník, F., Sudová, J., and Valníček, B.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
coronographs, active regions, and long-lasting X-ray emission
Language:
Czech
Description:
An exceptional 10-hour enhancement in the level of the soft X-ray emission, most probably originated in an exceptionally active region with flares at the eastern limb of the disk on Jan. 25, 1981, is described. This phonomenon has been called "an outstanding X-ray emission of an active region" (1984) and is documented by measurements made independently on two probes, i.e. GEQS-2 and PROGNOZ-8. The rise in the level of the X-ray emission (2-8 keV) amounted to about one order of magnitude (from l10^-6 to 10^-5 Wm^-2). The separate emission of flares are superimposed on this large enhancement. During the event, 3 outbursts were recorded int the 80 - 160 keV range, in each case at the time of recurrent flares in the region at the E limb (S 14, E 90) (Křivský and Scheirich, 1984). The most significant flares of this period were recorded by the coronograph on Lomnický štít. The flare had the form of ascending flare loops, at the sides of which ejections towards the corona or arcs receding to the disk could be observed. Radio burst of type IV and II occurred in the explosive phase of the flare, as well as a hard X-ray emission burst within the same interval in which bright flare loops were generated at the very beginning, and when partlcle acceleration apparently occurred. The fast particles were not recorded on the Earth due to its unfavourable position relative to their source and trajectory, but after 17:00 UT the X-ray photometer aboard the Prognoz-8 satellite registered a large number of unresolved fast particles (see Fig. 3). The studied phenomenon belongs to the interval of the Solar Maximum Year (Aug. 1979 - Feb. 1981).
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3. Prognoz data - Part IV: Solar X-ray flux in the 4-8 keV band during the period July 1, 1983 - January 13, 1984

Creator:
Valníček, B., Fárník, F., Sudová, J., Komárek, B., Likin, O., and Pisarenko, N.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Prognoz satellite and solar X-ray photometer
Language:
Czech
Description:
Introduction: In July 1983 the Prognoz 9 satellite was launched with the fifth Czechoslovak solar X-ray photometer of the Prognoz type (RF - 2P) onboard. This publication represents a brief description of the instrument ad survey plots of obtained data. Similar plots have been published in the three previous books containing data from the Prognoz 5, 6, 7 and 8 experiments. The Prognoz 8 satellite was launched on July 1, 1983 into the orbit of apogee of 720 000 km and perigee of 380 km, inclination of 65° and orbital period of about 641 hours. This photometer was in operation till January 15, 1984. and Kontakt: František Fárník
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4. Prognoz data - Part V: Solar X-ray flux in the 2.1.-4.2. keV band during the period April 26, 1985 - October 15, 1985

Creator:
Valníček,, B., Fárník, F., Sudová, J., Komárek, B., Likin, O., and Pisarenko, N.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
investigation, solar X-ray photometer, and satellites
Language:
Czech
Description:
Introduction: In April 1985 the Prognoz 10 satellite was launched wih the sixth Czechoslovak solar X-ray photometer of the Prognoz type (RF-2P) onboard. This publication represents a brief description of the instrument and survey plots of obtained data. Similar plots have been published in the four previous books containing data from the Prognoz 5, 6, 7, 8 and 9 experiments. The Prognoz 10 satellite was launched on April 26, 1985 into the orbit of apogee of 200 315 km and perigee of 420 km, inclination of 65° and orbital period of abour 96.4 hours. The photometer was in operation till October 15, 1895.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public