... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

... The disc accretion process is an essential component of star and planet formation theories. ... Much of the detailed knowledge of the physical processes involved in disc accretion have been gained through observations of nearby ( Z ) of the local environment are thought to affect PMS disc accretion rates, and disc evolutionary timescales. ... I measure the accretion rates of these PMS stars using the intensities of the U /H band excess measured through either optical spectra or imaging. ...

... This file table1 97 1345 A catalog of positions, radial velocities and proper motions table2 36 19 Coordinates of Kapteyn's areas table3 64 30 List of suspected bynaries and variables ------------------------------------------------------------------- ... Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- N Kapteyn's area number 6- 18 A13 --- Name Star identification 21- 22 I2 h RAh ...

... PISTON piston . ... this command is not used by the TCC The guide camera mechanical controller sets the filter, focus and other mechanical functions, but not the position of the guide camera in the focal plane. Positioning, if available, is handled by one or two guider position axes controllers , one per axis of motion. ... Notifies the controller that subsequent commands apply to the guider mechanical controller. ... Sets the piston of the guider to the specified value (in decimal microns). ...

I/146 Positions and Proper Motions (Roeser+ 1988) ================================================================================ Catalogue of Positions and Proper Motions Roeser S., Bastian U. =1988A .. ... 449R ================================================================================ ADC_Keywords: Positional data; Proper motions Description: PPM North gives J2000 positions and proper motions of 181,731 stars north of -2.5 degrees declination. ... The mean epoch is near 1931. ...

... ---------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- catalog .dat 269 36020 Revised NLTT Catalogue and 1st Supplement Description of catalog columns (see Paper II for details): -------------------------------------------------------------------------------- Summary Information 1) NLTT number (drawn consecutively from 1 to 58,845) 2) binary component 3) RA ( 2000 ), epoch 2000 ( ...

... Schubert calculus and Gelfand­Zetlin polytopes (with Valentina Kiritchenko and Vladlen Timorin), 32 pages, preprint, 2011. Available on arXiv:1101.0278. ... Springer fiber components in the two columns case for types A and D are normal (with Nicolas Perrin), Bulletin de la Sociґ ґ Mathґ ete ematique de France, to appear, 2011. ... Bruhat order for two subspaces and a flag, 30 pages, preprint, 2007. Available on arXiv:math/0704.3061. ... English translation: Moscow Univ. Math. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Marc White . ... Research . ... The outflows driven by forming protostars provide important clues to the nature of the star formation process. My research focuses on observations and analysis of the outflows driven by actively-accreting protostars. ... How are the outflows being driven? ... Built by my home institution, The Research School of Astronomy and Astrophysics of The Australian National University, NIFS is a fantastic instrument for doing protostellar outflow work. ...