An optimized time screening algorithm for ROSAT PSPC and HRI observations
نویسندگان
چکیده
منابع مشابه
ROSAT PSPC / HRI observations of the open cluster NGC 2422
We present the results of a ROSAT study of NGC 2422, a southern open cluster at a distance of about 470 pc, with an age close to the Pleiades. Source detection was performed on two observations, a 10-ksec PSPC and a 40-ksec HRI pointing, with a detection algorithm based on wavelet transforms, particularly suited to detecting faint sources in crowded elds. We have detected 78 sources, 13 of whic...
متن کاملSpatial corrections of ROSAT HRI observations
X-ray observations with the ROSAT High Resolution Imager (HRI) often have spatial smearing on the order of 10 (Morse 1994). This degradation of the intrinsic resolution of the instrument (5′′) can be attributed to errors in the aspect solution associated with the wobble of the space craft or with the reacquisition of the guide stars. We have developed a set of IRAF/PROS and MIDAS/EXSAS routines...
متن کاملROSAT HRI observations of radio-loud AGN
We present the results of three ROSAT HRI observations of AGN expected to reside in clusters of galaxies. Although the exposures were truncated by the premature end of the ROSAT mission, valuable information could be achieved which greatly improved upon the previous PSPC results. For RGB 1745+398 we could separate the cluster emission from that of the BL Lac and could confirm the cluster parame...
متن کاملDeep ROSAT HRI observations of the Pleiades
In a deep X-ray survey of the Pleiades open cluster, we use the ROSAT High Resolution Imager to explore a region of the cluster formerly surveyed with the PSPC. These new observations substantially improve upon both the sensitivity and the spatial resolution for this region of the Pleiades, allowing us to detect 18 cluster members not detected before and 16 members not included in the catalogs ...
متن کاملdevelopment and implementation of an optimized control strategy for induction machine in an electric vehicle
in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1998
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1998212