Search Publications
Continuum emission enhancements and penumbral changes observed during flares by IRIS, ROSA, and Hinode
Fletcher, L.; Mathioudakis, M.; Guglielmino, S. L. +6 more
In this paper we describe observations acquired by satellite instruments ( Hinode/SOT and IRIS) and ground-based telescopes (ROSA@DST) during two consecutive C7.0 and X1.6 flares occurred in active region NOAA 12205 on 2014 November 7. The analysis of these data show the presence of continuum enhancements during the evolution of the events, observ…
Kinematics of a compression front associated with a Coronal Mass Ejection
Bemporad, A.; Frassati, F.; Susino, R. +1 more
On 2014 November 1st a solar prominence eruption associated with a C2.7 class flare and a type II radio burst resulted in a fast partial halo Coronal Mass Ejection (CME). Images acquired in the extreme UV (EUV) by SDO/AIA and PROBA-2/SWAP, and in white light (WL) by SOHO/LASCO show a bright compression front expanding ahead of the CME. The main go…
Satellite observations of reconnection between emerging and pre-existing small-scale magnetic fields
Young, P. R.; Guglielmino, S. L.; Romano, P. +2 more
We report multi-wavelength ultraviolet observations taken with the IRIS satellite, concerning the emergence phase in the upper chromosphere and transition region of an emerging flux region (EFR) embedded in the unipolar plage of active region NOAA 12529. The photospheric configuration of the EFR is analyzed in detail benefitting from measurements …
INTEGRAL and XMM-Newton observations of the low-luminosity and X-ray-rich burst GRB 040223
McGlynn, S.; McBreen, S.; Foley, S. +6 more
GRB 040223 was observed by INTEGRAL and XMM-Newton. GRB 040223 has a peak flux of (1.6 ±0.13)×10-8 ergs cm-2 s-1, a fluence of (4.4±0.4)×10-7 ergs cm-2 and a steep photon power law index of -2.3±0.2, in the energy range 20-200 keV. The steep spectrum implies it is an X-ray-rich GRB with emissi…
GRBs Optical follow-up observation at Lulin observatory, Taiwan
Ip, W. H.; Tamagawa, T.; Makishima, K. +3 more
The Lulin GRB program, using the Lulin One-meter Telescope (LOT) in Taiwan started in July 2003. Its scientific aims are to discover optical counterparts of XRFs and short and long GRBs, then to quickly observe them in multiple bands. Thirteen follow-up observations were provided by LOT between July 2003 and Feb. 2005. One host galaxy was found at…
Systematic analysis of X-ray GRB afterglows observed with XMM-Newton and Chandra
Piro, L.; Gendre, B.; Depasquale, M.
We present a sample of GRB afterglows observed in the X-ray band with XMM-Newton or Chandra, focusing on the brightest events. We have derived for this sample the temporal slope and the spectral index of the continuum, and used closure relationships to discriminate the afterglow environment for each burst. We show that jet features are excluded mo…
Ulysses cosmic-ray investigations extending from the south to the north polar regions of the Sun and heliosphere.
Simpson, J. A.
The recent rapid transit of Ulysses from the solar south polar to the north polar region has confirmed the earlier findings by the COsmic-ray and Solar-Particle INvestigations (COSPIN) international consortium and has yielded additional discoveries that are important for understanding heliospheric modulation. High-resolution isotopic measurements …
3D heliospheric simulations of cosmic rays in the light of Ulysses.
Jokipii, J. R.; Kota, J.
Recent Ulysses observations in the polar regions of the heliosphere have provided fundamental new insights into the modes of cosmic-ray transport in the heliosphere. Ulysses discovered variations in the magnetic field which are large enough to produce significant cosmic-ray effects, and which are consistent with a previous prediction. In addition …
The Ulysses mission: an introduction.
Smith, E. J.; Marsden, R. G.
On 30 September 1995, Ulysses completed its initial, highly successful, survey of the polar regions of the heliosphere in both southern and northern hemispheres, thereby fulfilling its prime mission. The results obtained to date are leading to a revision of many earlier ideas concerning the solar wind and the heliosphere. Now embarking on the seco…
Cosmic rays in the heliosphere.
Bieber, J. W.
This rapporteur paper covers topics of anomalous cosmic rays, shock acceleration, modulation and transport theory, cosmic-ray gradients, corotating interaction regions, coronal-mass ejections, and solar neutrinos. Among the highlights are: conclusive proof that most anomalous cosmic rays are singly charged, undisputed detection of anomalous cosmic…