... Up: Data Analysis Tools, Techniques, and Software . Previous: Starfinder: a Code for Crowded Stellar Fields Analysis . Table of Contents - Subject Index - Author Index - PS reprint - . ... 216, Astronomical Data Analysis Software and Systems IX, eds. N. Manset, C. Veillet, D. Crabtree (San Francisco: ASP), 627 . ... Kitt Peak National Observatory, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726 . ...

... Binary orbits in the acceleration/period plane . Circular Orbits . ... We first present the equations for the period and acceleration of a pulsar in an eccentric binary system as a function of its position in the orbit. ... In Freire, Kramer & Lyne (2001) (from where most of this text and following equations are taken), we describe in more detail how circular binary orbits can be determined from the observed periods and accelerations of the pulsar. ... where is the orbital period of the binary. ...

. Next: Identification with rotating neutron Up: The discovery of pulsars Previous: The discovery . љ . source lies outside the solar system . distance is typical of stellar distances . source must be very small . possibly a white dwarf or neutron star . astrophysical origin, not ET civilisation . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

The rotation of the stellar component of galaxy is obtained from the compilation of internal stellar kinematics . The rotation of the gaseous component is given in the parameter vmaxg , and the stellar velocity dispersion in vdis . For disk-like galaxies (eg. mostly disks of spiral), the apparent rotation may be converted into the true (physical) rotation using the inclination given in the parameter incl . HyperLeda . Questions: prugniel@obs.univ-lyon1.fr

February 4, 2008 (Monday) Gabriella Sciolla, Massachusetts Institute of Technology . ... This detector, which will be operated underground in 2008-2009, will allow us to set limits on spin-dependent Dark Matter interactions using a directional detector. 4:00 pm, 472 Willamette Hall . ... return to top . ... This seminar will briefly review the role of axions in particle and astrophysics, and will describe the progress we have made in the experimental search. 4:00 pm, 472 Willamette Hall . ...

... 2016 February 7 . Advanced LIGO: Gravitational Wave Detectors Upgraded . ... Explanation: Accelerate a charge and you'll get electromagnetic radiation : light. But accelerate any mass and you'll get gravitational radiation . ... Separated detectors can be used to discern gravitational waves from everyday bumps. ... Together with its sister interferometer in Louisiana , these gravitational wave detectors continue to be upgraded and are now more sensitive than ever. ... About APOD | ...

Region markers can be moved, resized, rotated, zoomed, deleted, and can change geometric type. ... For example, markers placed on astronomical catalog positions should be fixed so that one cannot accidentally move them off the specified position. ... Parameters can be fixed using the fix option of the regions public access point (for fixing classes of markers) or by means of a fix keyword in the definition of an externally loaded marker. ... In the command: echo "regions fix all -position -size" | ...

... Basic Observables: Zero-differenced phase and code ionosphere-free combinations of global GNSS network stations, corrected by P1-C1 satellite code biases (cc2noncc), daily observations with 30 seconds sampling rate Sites coordinates : IGb08 reference frame coordinates and velocities Displacements: solid tides, ocean loading, pole tide loading (IERS 2010) Geometric model : Receivers antennas eccentricities, absolute receiver and ...

Target Acquisition Reference Information . ... In almost all cases where an onboard acquisition will not work (because the object is in a crowded field, or is variable, or is a moving target), it is sufficient to use an early acquisition to get a WFPC2 or FOC image a few weeks in advance of the GHRS observation. ... Explicit BRIGHT and FAINT limits may be specified if you desire, although there is an increased risk of a failed acquisition unless you are confident of those fluxes. ... MAPs . ...

Next: Blinkers and Bi-directional Jets Up: J.G. Doyle, Research Astronomer Previous: J.G. Doyle, Research Astronomer . Gerry Doyle reports that collaborative research with Maria Madjarska has revealed for the first time the presence of bi-directional jets and magnetic reconnection occurring at coronal hole boundaries. ... Next: Blinkers and Bi-directional Jets Up: J.G. Doyle, Research Astronomer Previous: J.G. Doyle, Research Astronomer M.E. Bailey . ...

... An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activity. Unfortunately, the measurements of the rotation periods of the comet nucleus depend on the model assumptions and it is one of the main reasons for the scatter of the estimates given in various articles for a given comet. ... Right: the image of the comet 29P/Schwassmann-Wachmann 1 obtained at the 6-m telescope. ...

... real . ... All sources with MASKFRAC mfraclimit will have flag 1 set to T (see description). brcolumn . ... Name of column to be used to define a circle of influence of a bright source (used to set flags 2 and 4) . ... Number by which the 'brcolumn' is multiplied to obtain the 'circle of influence' radius in arcs (for flag 2) . ... Number by which the column EXT is multiplied to obtain the 'circle of extended emission' radius in pixels (internally converted to arcs) (for flag 3 and 5) . ...

Atmospheric influence on the different radio-engineering system functioning . ESTIMATION OF ATMOSPHERIC OPTICAL CHARACTERISTICS AND REMOTELY SANSED IMAGE CORRECTION . ... Direct transmittance estimation results for 12 channels of the spectrometer CHRIS. ... We have managed to develop a direct method of estimating the discrete Normalized Atmospheric Point Spread Function (NAPSF) from available images alone, not using any external sources of information about the atmosphere. ... IRE RAS 1996-20 11 ...

Next: Other parameters of the Up: The Model Previous: Initial binary parameters . As we only deal with initially massive binary systems (their primary's mass is higher than 10 ), which are capable of evolving off the main sequence during less than years, the compact stars left behind stellar evolution are (in the case of the most massive stars) NSs and BHs. ... For a NS belonging to a binary, the evolution complicates as the secondary star evolves: for example, (recycling), etc. ...

The VIRGO project is a physics experiment; its aim is the detection of gravitational waves. ... It has not yet been possible to detect directly the gravitational waves: it remains one of the major challenges of experimental physics. ... Interferometric antennas for gravitational waves Gravitational waves distort space-time: along two perpendicular directions, the distances between fixed points will increase (resp. decrease), at the arrival of a gravitational wave. ... Publications from our Group . ...

EPM-ERA2012 Lunar Ephemeris and selenodynamical parameters from LLR data(1970-2012) M.V. Vasilyev, E.I.Yagudina IAA RAS, St-Petersburg, Russia Reflector at the Moon The reflector 's positions at the Moon surface 3.5 m telescope at Apache station INTRODUCTION MODERN EPHEMERIDES: 1. ... IAA RAS, Russia-EPM-ERA2012 The present analysis of (17580) LLR observations, (time interval 1970, March - 2012, February) Model ( brief description). The dynamical model EPM-ERA has been developed by G.A. Krasinsky. ...

. The Cambridge Leverhulme Quantitative Cosmology group is a collaboration between the Institute of Astronomy , the Cavendish Astrophysics and DAMTP Cosmology groups, all within the University of Cambridge . Members . Overview (1.5Mb) . Recent Papers . Internal Pages . Predictions of constraints on the fine structure constant, alpha, and other parameters, with Planck (astro-ph/0309205) . Last modified: Tuesday Jan 6 2004

Next: Principles of organization Up: Further advance in the Previous: Further advance in the . ... An ability of using different catalogs makes this problem considerably simpler. Lately Different attempts have been made for combining many astronomical catalogs in unified databases NED, SIMBAD, ESIS, ADS, etc.(see reviews by Andernach et al.1994; Andernach 1995). ... We propose a new solution to this problem with a ``CATalogs supporting System'' (CATS) at Special Astrophysical Observatory (SAO). ...

... Parameters of the Moon-perturbed orbit . ... From orbits consistent with this limitation and with the date of the launch October 1, 2000 as an example, an orbit was selected with apogee directed to the North Galactic pole at the begining and rotation of orbit plane was maximized. The initial state vector is given in the inertial coordinate system in epoch J2000.0. ... The orbit has initial perigee radius Rp=7000.0 km, initial apogee radius Ra=343000.0 km and initial period T=8.453 days. ...

J/AstL/vol/page SAI Open Clusters Catalog (Glushkova+, 2009) ================================================================================ Automated search for star clusters in large multiband surveys. ... Color excesses E(B-V), distance moduli and ages were determined for 141 new and 27 known, but poorly studied clusters. We present the Sternberg Astronomical Institute Open Clusters Catalog (SAI OCL Catalog) of coordinates, diameters and main physical parameters of these clusters. ...