Search Publications
The effect of protons on the performance of swept-charge devices
Smith, David R.; Gow, Jason
The e2v technologies CCD54, or swept-charge device (SCD) has been extensively radiation tested for use in the Chandrayaan-1 X-ray Spectrometer (C1XS) instrument, to be launched as a part of the Indian Space Research Organisation (ISRO) Chandrayaan-1 payload in 2008. The principle use of the SCD is in X-ray fluorescence (XRF) applications, the devi…
X-Ray Studies of HESS J1837-069 with Suzaku and ASCA: a VHE Gamma-Ray Source Originated from the Pulsar Wind Nebula
Dotani, Tadayasu; Ebisawa, Ken; Bamba, Aya +1 more
We present ASCA and Suzaku studies of the TeV source HESS J1837-069, which has not been identified in other wavelengths. We confirm the presence of two X-ray sources in the Suzaku XIS image, AX J1838.0-0655 and AX J1837.3-0652, near both ends of the elongated TeV emission region. The XIS spectra of the two sources were reproduced by an absorbed po…
Suzaku Spectroscopy of Vela Shrapnel B
Yamaguchi, H.; Katsuda, S.
We present the X-ray observation of Vela shrapnel B with the X-ray Imaging Spectrometer on board the Suzaku satellite. The shrapnel is one of several ejecta fragmentlike features protruding beyond the primary blast wave shock front of the Vela supernova remnant. The spectrum of shrapnel B is well represented by a single-temperature thin-thermal pl…
Advances in Plasmaspheric Wave Research with CLUSTER and IMAGE Observations
Carpenter, Donald L.; Darrouzet, Fabien; Grimald, Sandrine +8 more
This paper highlights significant advances in plasmaspheric wave research with Cluster and Image observations. This leap forward was made possible thanks to the new observational capabilities of these space missions. On one hand, the multipoint view of the four Cluster satellites, a unique capability, has enabled the estimation of wave characteris…
Vector Magnetic Fields and Electric Currents From the Imaging Vector Magnetograph
van Ballegooijen, A. A.; Li, Jing; Mickey, Don
First, we describe a general procedure to produce high-quality vector magnetograms using the Imaging Vector Magnetograph (IVM) at Mees Solar Observatory. Two IVM effects are newly discussed and taken into account: (1) the central wavelength of the Fabry-Pérot is found to drift with time as a result of undiagnosed thermal or mechanical instabilitie…
Astrometric and photometric observations of solar system bodies with Pulkovo Observatory's automatic mirror astrograph ZA-320M
Gorshanov, D. L.; Kouprianov, V. V.; Devyatkin, A. V. +3 more
A brief description of the process of astrometric and photometric observations and their processing by an automatic complex, based on Pulkovo Observatory’s ZA-320M telescope, is presented. The basic results of astrometric and photometric observations of Solar System bodies obtained during 1997-2007 are given. They include, in particular, the resul…
Mapping the Spatial Distribution of Dust Extinction in NGC 959 Using Broadband Visible and Mid-Infrared Filters
Jansen, R. A.; Windhorst, R. A.; Tamura, K.
We present a method to estimate and map the two-dimensional distribution of dust extinction in the late-type spiral galaxy NGC 959 from the theoretical and observed flux ratio of optical V and mid-IR (MIR) 3.6 µm images. Our method is applicable to both young and old stellar populations for a range of metallicities, and is not restricted to …
Adapting Marchal's test of escape to real triple stars
Li, P. J.; Fu, Y. N.; Sun, Y. S.
Context: For a general N-body system, Marchal constructed an analytical test of escape, which uses only a one-dimensional projected motion state of the system at any given instant. This test is well adapted to identifying real, disintegrating small stellar systems, of which the full motion states are generally unavailable. However, to our knowledg…
Cross-Calibration of SMART-1 XSM with GOES and RHESSI
Väänänen, Mikko; Alha, Lauri; Huovelin, Juhani
A number of X-ray instruments have been active in observing the solar coronal X-ray radiation this decade. We have compared XSM observations with simultaneous GOES and RHESSI observations. We present flux calibrations for all instruments and compare XSM and GOES total emission measures (TEM) and temperatures (T).
The X-ray properties of the energetic pulsar PSR J1838-0655
Lin, Lupin Chun-Che; Takata, Jumpei; Hwang, Chorng-Yuan +1 more
We present and interpret several new X-ray features of the X-ray pulsar PSR J1838-0655. The X-ray data are obtained from the archival data of Chandra, RXTE and Suzaku. We combine all these X-ray data and fit the spectra with different models. We find that the joint spectra are difficult to fit with a single power law; a broken power-law model with…