5 citations · 8 across the 3 of their papers we have counts for
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astro-ph2003★ 5 cited
Magnitude systems in old star catalogues
Tomoko Fujiwara, Hitoshi Yamaoka
The current system of stellar magnitudes first introduced by Hipparchus was strictly defined by Norman Robert Pogson in 1856. He based his system on Ptolemy's star catalogue `Almag…
astro-ph2002
Properties of the background of EPIC onboard XMM-Newton
H. Katayama, I. Takahashi, Y. Ikebe +3
Understanding a background is crucial in particular for a study of low surface brightness objects. In order to establish the background subtraction method, we have studied properti…