... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

. Photographs of the Hubble Space Telescope . James Webb Space Telescope Graphics . Photographs of the Space Telescope Science Institute . Caltech photographs of Edwin Hubble (Copyrighted material) . Photographs of Goddard Space Flight Center . Selected Illustrations (line-art) related to HST . Some HST -Related News Articles and other Media (Copyrighted material) . HubbleSite . HubbleSite Sci-Tech . NASA's Hubble Project . Wikipedia . Zolt Levay , STScI . September 16, 2006

... APPLY/DISPERSION in out [y] [coef] . Apply the dispersion relation to a 1D spectrum and generates a table . BATCH/LONG . ... CALIBRA/FLUX in out [resp] . Correct an image for the instrumental response function . ... Wavelength calibration of 1D and long-slit spectra . ... LINADD/LONG in w,bin [y] [mtd] [mode] [line] . ... PLOT/CALIBRATE [mode] . ... Plots a 1D spectrum in table format, as supplied by APPLY/DISPERSION . ... RESPONSE/LONG [plot] [fit] [deg] [smo] [table] [image] [visu] . ...

SAS home . ... You will find the period of a variable source and create a folded light curve of the object . ... We will run SAS and XRONOS . In pink is marked what you have to type at the command line or some useful scripts. ##########################script to extract a timing event file form ODF################################ . ... or ... setenv SAS_DIR /sas/Linux/RedHat9/sas6_1_0 . ... source $SAS_DIR/sas-setup.csh ... setenv SAS_ODF /SAS_Workshop/Timing/PSRB1509 . ... setenv SAS_CCF ccf.cif . ...

... A universal physical relation for quasars . ... Harvey Tananbaum and his collaborators have first observed a relation between the soft X-ray and the optical/ultraviolet emission in AGN in 1979. Such relation is nonlinear, and it is usually parameterized as dependence between the logarithm of the monochromatic luminosities at 2500 †Е ( L 2500†Е ) and 2 keV ( L 2keV ) . ... Yet, the dispersion along the L 2500†Е тАУ L 2keV relationship is found to be rather high, typically ~0.35тАУ0.4 in log units. ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Previously understood that magnetic fields were directly related to rotation, so when I read that Mars, like Venus, didn't have one, my understanding crumbled. What exactly causes magnetic fields in planets? ... RELATED TOPICS: MAGNETIC FIELD . Planetary magnetic fields are definitely related to rotation, but directly not so much. ... Get instant access to subscriber content on Astronomy.com! ...

... Most of the spirals discussed in the following are well-known starburst galaxies (M 82, NGC 253, etc.) In addition to their nuclear activity, which makes them so popular, the selected galaxies have several other phenomena in common, such as bars, gas outflow, and possibly nuclear rings. ... I will show that the gas dynamics in the outer and inner parts of these galaxies are strongly related to their starburst activity. ... NGC 253 . ... The peculiar galaxy NGC 4258: A black hole candidate. ...

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade Pictor XT-Series CCD Autoguider/Imagers . ... The status bar provides tool tips for each menu item, communication status information, the current x and y coordinates of the mouse on the active image, and the temperature of the CCD chip. (left to right): . ... File Save: Saves the current active image. ... about meade | ...

This module provides for loading of executable code and modules into the server at start-up or restart time. ... On Windows, mod_dll was used in beta release 1.3b1 through 1.3b5. mod_so combines these two modules into a single module for all operating systems. ... Because Apache for Windows does not have the Configure program of Apache for Unix, the module's source file must be added to the ApacheCore project file, and its symbols must be added to the os\win32\modules.c file. ... Module: mod_so . ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

Site surveys, from pioneering times to the VLT era" , Marc Sarazin, ESO Messenger, June 1994 (Postscript, 4 pp. ... Statistical Prediction of Astronomical Seeing and of Telescope Thermal Environment" . ... A. Aussem, F. Murtagh and M. Sarazin, Vistas in Astronomy, 38, 357-374, 1994. [lengthier version of published paper: 39pp. postscript, 572K] . ... F. Murtagh, A. Aussem, and M. Sarazin, Publications of the Astronomical Society of the Pacific, 107, 1995, 702-707. [14pp. postscript, 67K] . ... 1995. ...

... The concepts of Fourier frequency and wavelet duration are obviously related. ... Among many sensible definitions, we chose to require that the peak of the wavelet mean spectrum should be matched with the singularity of the Fourier transform of the cosine wave. Then, it can be shown that the frequency of the cosine is related to the wavelet duration by the relation . ... The ambiguous definition of the duration of an event is common to the sizing of any object of irregular shape. ...

... In collaboration with the STScI and with the NICMOS Investigation Definition Team we have been developing software to predict aspects of NICMOS performance and to analyze NICMOS grism data. Quick look analysis software has been developed to extract spectra from NICMOS grism images and matching direct images to support ground testing and in-orbit verification. ... Software is being developed at the STScI to ensure the proper calibration of data obtained with NICMOS. ...

... Actually, it's not true, since it has optimization for storing small tsvectors (<TOAST_INDEX_TARGET bytes, 512 bytes). ... 130 true bits, 1886 false bits 4 | ... 95 unique words 4 | ... 127 true bits, 1889 false bits 4 | ... 170 true bits, 1846 false bits 4 | ... 121 true bits, 1895 false bits .................................... 4 | ... 61 unique words (417366 rows) -- internal node arxiv=# select * from gist_print('gist_idx_90') as t(level int, valid bool, fts gtsvector) where level =3; level | ...

slitless -- Extract a spectrum from a direct/GRISM image pair slitless image grism output PARAMETERS . ... A two dimensional direct image to be used to select an object. grism . A two dimensional GRISM image containing slitless spectra of objects present in the direct image. output . ... Toggle whether or not a background estimate is subtracted from the extracted object spectrum. mingood = INDEF . Pixels of the grism image with values smaller than this are ignored. maxgood = INDEF . ...

... Mindful of these biases, I can now explore the relations between the measured rotation periods and various other observables. The hypothesis behind monitoring stellar variability is that active stars have asymmetric spot distributions on their photospheres. ... They found that only stars with rotation periods greater than seven days show variations greater than 0.4 magnitudes at I. Bouvier et al . ... 1993a) demonstrated a relation between X--ray flux and spectral type in ZAMS stars. ...

Do LIRGs follow the Tully-Fisher relation? ... For a small we can say majority of investigate i Conclusion number of galaxies in our sample, that the T-F relation holds. ... The purpose of this research was to study the LIRGs (Luminous Infrared Galaxies) and see if they follow the Tully-Fisher relation. The LIRGs are different to normal galaxies in the fact that they emit 90% of their light in infrared. ... The faster the galaxy rotates, the wider is the emission line in velocity. ...

... Content Model: %Body.Content . ... Note that the ID, LANG and CLASS attributes can be used with virtually all of the elements permitted in the document body. ... CLASS . ... The CLASS attribute is most commonly used to attach a different style to some element, but it is recommended that where practical class names should be picked on the basis of the element's semantics, as this will permit other uses, such as restricting search through documents by matching on element class names. ...

... Telescope concept . ... The Submillimetron Project is dedicated to astronomical studies at the submillimeter and far infrared wavelengths using a cryogenic telescope located on the Russian segment of the International Space Station (ISS). The Astro Space Center of the Lebedev Institute of the Russian Academy of Sciences is responsible for developing the Submillimetron Project. ... Currently, the Astro Space Center is carrying out a pre-Project study under contract with the Russian Space Agency. ...

Klochkova V.G., Chentsov E.L, Panchuk V.E., Yushkin M.V. Discovery of spectral variability of post-AGB star SAO40039. ... Astron. ... Klochkova V.G., Panchuk V.E., Tavolganskaya N.S., Kovtyukh V.V. Spectroscopy of the virginide V1 (K307) inside the globular cluster M12. ... Klochkova V.G., Panchuk V.E. Spectroscopy of supergiants with IR-excesses: RV Tau type stars. ... Klochkova V.G., Panchuk V.E. Spectroscopy of supergiants with large IR-excesses: pulsating RV Tau type stars. ... Klochkova V.G. Dec. ...