Abstract
Simultaneous X-ray images in hard (20–40 keV) and softer (6.5–15 keV) energy ranges were obtained with the hard X-ray telescope aboard the Hinotori spacecraft of an impulsive solar X-ray burst associated with a flare near the solar west limb.
The burst was composed of an impulsive component with a hard spectrum and a thermal component with a peak temperature of 2.8 × 107 K. For about one minute, the impulsive component was predominant even in the softer energy range.
The hard X-ray image for the impulsive component is an extended single source elongated along the solar limb, rather steady and extends from the two-ribbon Hα flare up to 104 km above the limb. The centroid of this source image is located about 10″ (7 × 103 km) ± 5″ above the neutral line. The corresponding image observed at the softer X-rays is compact and located near the centroid of the hard X-ray image.
The source for the thermal component observed in the later phase at the softer X-rays is a compact single source, and it shows a gradual rising motion towards the later phase.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Hoyng, P., Machado, M. E., Duijveman, A., and 21 co-authors: 1981a, Astrophys. J. 244, L153.
Hoyng, P., Duijveman, A., Machado, M. E., Rust, D. M., Švestka, Z., and 7 co-authors: 1980b, Astrophys. J. 246, L115.
Kane, S. R.: 1983, Solar Phys. 86, 355.
Kane, S. R., Anderson, K. A., Evans, W. D., Klebesadel, R. W., and Laros, J.: 1979, Astrophys. J. 233, L151.
Kane, S. R., Fenimore, E. E., Klebesadel, R. W., and Laros, J. G.: 1982, Astrophys. J. 254, L53.
Machado, M. E., Duijveman, A., and Dennis, B. R.: 1982, Solar Phys. 79, 85.
Makishima, K.: 1982, Proc. Hinotori Symposium on Solar Flares, Tokyo, Institute of Space and Astronautical Science, p. 120.
Ohki, K., Nitta, N., Tsuneta, S., Takakura, T., Makishima, K., Murakami, T., Ogawara, Y., and Oda, M.: 1982, Proc. Hinotori Symposium on Solar Flares, Tokyo, Institute of Space and Astronautical Science, p. 69.
Ohki, K., Takakura, T., Tsuneta, S., and Nitta, N.: 1983, Solar Phys. 86, 301.
Simnett, G. M.: 1983, Solar Phys. 86, 289.
Simnett, G. M. and Strong, K. T.: 1984, Astrophys. J. 284, 839.
Takakura, T.: 1984, Solar Phys. 91, 311.
Takakura, T.: 1985, in C. de Jager and Chen Biao (eds.), Proc. International Workshop on Solar Physics and Interplanetary Travelling Phenomena, Kunming, 1983, Science Press, Beijing, p. 122.
Takakura, T. Ohki, K. Tsuneta, S., and Nitta, N.: 1983b, Solar Phys. 86, 323.
Takakura, T., Ohki, K., Nitta, N., and Wang J. L.: 1984a, Astrophys. J. 281, L51.
Takakura, T., Tanaka, K., and Hiei, E.: 1984b, Adv. Space Res. 4, 143.
Takakura, T., Tsuneta, S., Ohki, K., Nitta, N., Makishima, K., Murakami, T., Ogawara, Y., Oda, M., and Miyamoto, S.: 1983a, Astrophys. J. 270, L83.
Tsuneta, S.: 1984, Ann. Tokyo Astron. Observ. Second Series 20, 1.
Tsuneta, S., Nitta, N. Ohki, K., Takakura, T., Tanaka, K., Makishima, K., Murakami, T., Oda, M., and Ogawara, T.: 1984b, Astrophys. J. 284, 827.
Tsuneta, S., Takakura, T., Nitta, N., Ohki, K., Tanaka, K., Makishima, K., Murakami, T., Oda, M., Ogawara, Y., and Kondo, I.: 1984a, Astrophys. J. 280, 887.
Watanabe, T., Tanaka, K., and Matsuoka, M.: 1982, Proc. Hinotori Symposium on Solar Flares, Tokyo, Institute of Space and Astronautical Science, p. 14.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Takakura, T., Tanaka, K., Nitta, N. et al. X-ray imaging of a solar limb flare on 1982 January 22. Sol Phys 107, 109–121 (1986). https://doi.org/10.1007/BF00155346
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00155346