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The Nature and Cause of Spectral Variability in LMC X-1
Nature Cause Spectral Variability LMC X-1
2011/10/21
We present the results of a long-term observation campaign of the extragalactic wind-accreting black-hole X-ray binary LMC X-1, using the Proportional Counter Array on the Rossi X-Ray Timing Explorer ...
Optical Spectral Variability of the Very-High-Energy Gamma-Ray Blazar 1ES 1011+496
Optical Spectral Variability the Very-High-Energy Gamma-Ray Blazar 1ES 1011+496
2011/1/11
We present results of five years of optical (UBVRI) observations of the very-high-energy gamma-ray blazar 1ES 1011+496 at the MDM Observatory. We calibrated UBVRI magnitudes of five comparison stars i...
Spectral variability of quasars from multi-epoch photometric data in the Sloan Digital Sky Survey Stripe 82
Spectral variability multi-epoch photometric data
2011/1/11
We present a new approach to analysing the dependence of quasar variability on rest-frame wavelengths. We exploited the spectral archive of the Sloan Digital Sky Survey (SDSS) to create a sample of mo...
Study of spectral variability of the planetary nebula ic 4997 over 25 years (1972-1996)
planetary nebula spectral variability ic 4997
2009/6/11
Study of spectral variability of the planetary nebula ic 4997 over 25 years (1972-1996)。
Spectral Variability in Hard X-rays and the Evidence for a 13.5 Years Period in the Bright Quasar 3C273
Galaxies individual 3C273—X-rays
2009/5/19
We report the observation of nearest quasar 3C273 made
with LASE instrument on November 20th, 1998 as a part of our continuing
programme of balloon borne hard X-ray observations in the 20–200 keV
b...