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Periodicity Search in the X-ray Data of RX J0007.0+7302
Lin, Lupin C. -C.; Chang, Hsiang-Kuang
Some unidentified EGRET sources have been reported to have probable X-ray counterparts. Periodicities in the X-ray data of those sources, if found, may help to strengthen the identification and to reveal their nature. We performed a detailed search of periodicities with a photon-counting method, the H-test, in the XMM and ASCA data of RX J0007.0+7…
pp ii High-order shock-capturing methods for modeling dynamics of the solar atmosphere
Bryson, Steve; Kosovichev, Alexander; Levy, Doron
We use one-dimensional high-order central shock-capturing numerical methods to study the response of various model solar atmospheres to forcing at the solar surface. The dynamics of the atmosphere is modeled with the Euler equations in a variable-sized flux tube in the presence of gravity. We study dynamics of the atmosphere suggestive of spicule …
A MERLIN Observation of PSR B1951+32 and Its Associated Plerion
Muxlow, T. W. B.; Golden, A.; Shearer, A. +4 more
In an investigative 16 hr L-band observation using the MERLIN radio interferometric array, we have resolved both the pulsar PSR B1951+32 and the structure within the flat spectral radio continuum region, believed to be the synchrotron nebula associated with the interaction of the pulsar and its ``host'' supernova remnant CTB 80. The extended struc…
Early BVRcIc imaging and the discovery of the optical afterglow of GRB 041218
Fukazawa, Y.; Tsunemi, H.; Torii, K.
We report early BVR_cIc imaging of the INTEGRAL GRB 041218. The observation started 129 s after the burst and a sequence of exposures in V, R_c, I_c, and B bands were repeated. The optical afterglow is detected in Rc and Ic bands while it was not detected in B and V. We find that the early afterglow deviates from a…
Temperature variations in Titan's upper atmosphere: Impact on Cassini/Huygens
Lammer, H.; Rucker, H. O.; Fischer, G. +5 more
Temperature variations of Titan's upper atmosphere due to the plasma interaction of the satellite with Saturn's magnetosphere and Titan's high altitude monomer haze particles can imply an offset of up to ±30K from currently estimated model profiles. We incorporated these temperature uncertainties as an offset into the recently published Vervack et…
Thermal structure of the Martian atmosphere retrieved from the IR spectrometry in the 15 µm CO2 band: input to MIRA
Grassi, D.; Zasova, L. V.; Formisano, V. +2 more
This paper describes one of the sources of the data concerning the thermal structure of the Martian atmosphere, based on the thermal IR spectrometry method. It allows to investigate the Martian atmosphere below 55 km by retrieving the temperature profiles from the 15 µm CO2 band. This approach enables to reach the vertical resolut…
Lyman alpha imaging of solar activity on the interplanetary hydrogen screen for space weather forecasting
Takahashi, Y.; Fukunishi, H.; Watanabe, S. +2 more
Interplanetary hydrogen atoms that penetrate into the heliosphere are illuminated by enhanced hydrogen Lyman alpha emission from solar active regions. Using the data obtained by the Solar Wind Anisotropies (SWAN) instrument on board the Solar and Heliospheric Observatory (SOHO), Bertaux et al. (2000) proposed a new method for earlier detection and…
Orbit correction without variational equations. The orbits of Caliban, 46P/Wirtanen and 67P/Churyumov-Gerasimenko
Aksnes, K.; Grav, T.
Differential orbit correction is performed by computing an osculating orbit from observations from which the perturbations have been subtracted. No variational equations need to be integrated except to solve for non-gravitational forces. The perturbations in the observations are obtained by subtracting a two-body orbit from an integrated, perturbe…
Comment on ``Rotation rate of Saturn's interior from magnetic field observations'' by Giacomo Giampieri and Michele K. Dougherty
Kaiser, M. L.; Desch, M. D.; Connerney, J. E. P. +2 more
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Chromospheric Internetwork Oscillations at Various Locations of the Quiet Sun
Ning, Zong-Jun; Ming-DeDing
We analyze oscillation behaviours in chromospheric internetwork regions using spectral observations of the CII 1334 Å line obtained with the Solar Ultraviolet Measurements of Emitted Radiation spectrograph (SUMER) aboard Solar and Heliospheric Observatory (SOHO). Three areas, 26×120arcsec2 each, at the various latitudes from …