... Meta Index / Home Page Photometry on sources is done in a similar fashion to that done by the SAS tasks omdetect and ommag . POINT-SOURCE PHOTOMETRY . The counts for a source are extracted within the aperture radius and the background (see the next paragraph) subtracted. If necessary, the background-subtracted counts are extrapolated to the coincidence-loss area corresponding to a circle of 12 unbinned pixels, using the point-spread function (this correction is tabulated as psf1 corr ). ...

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• SourceListFile
• Description
• Compute Background

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

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Next: Bivariate polynomial interpolation Up: Echelle Spectra Previous: Removal of particle . The estimation of the background is one of the critical points in the reduction of echelle spectra for two reasons. ... diffuse light in the interorder space coming from adjacent orders. sky background spectrum . ... These locations are defined when performing the order definition (command DEFINE/ECHELLE or DEFINE/HOUGH ) and can be displayed by command LOAD/ECHELLE . ... Sky background definition . ...

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• Combining Methods
• Documentation: LEDA: parameter: m21c
• Documentation: LEDA: parameter: mod0

... Convert from raw counts to count rates by dividing each data point by exposure time and correcting for disabled diodes. ... For paired aperture or spectropolarimetry observations, a second flatfield file is used. fl1hfile,fl2hfile . ... Object data are normalized to the reference aperture used to derive the average inverse sensitivity used in AIS_CORR. ... Uses inverse sensitivity file (iv1hfile) and, for paired aperture or spectropolarimetry, file (iv2hfile). iv1hfile,iv2hfile . ...

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• Guidelines for Preparing Viewgraphs and Computer based Presentations to be used
• HSP Data Handbook
• FOS Data Handbook

... Posts tagged ?background? ... Probability density functions are another way of summarizing the consequences of assuming a Gaussian error distribution when the true distribution is Poisson. We can compute the posterior probability of the intensity of a source , when some number of counts are observed in a source region, and the background is estimated using counts observed in a different region. ... In both cases a background of 200 counts collected in an area 40x the source area is used. ...

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• The AstroStat Slog background subtraction
• The AstroStat Slog background marginalization
• The AstroStat Slog aperture photometry

... This tool allows you to quickly place a co-ordinate system (compute a plate solution) onto an image which does not have one. ... The right window should be loaded with your target image (the image without the co-ordinate system), by pressing Target Images . ... To do this, you must first click (middle) in the left window, near a star, and then click (middle) in the right window near the corresponding star. ... As you select a star, a green circle is drawn around the fitted centre of the star. ...

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• Background Material for the Phase Correction Project
• blcal
• Computing Support at ATNF

The pitch, roll, and focus errors of the telescope (measured and computed in AO9 survey and tilt sensor pitch,roll ) can be corrected by using the tiedowns. ... Tiedown positions to correct the pitch,roll, focus errors versus azimuth for za 2 through 20 degrees. ... The pitch, roll, and focus errors are plotted versus azimuth for za 1 to 20 degrees (the color changes every two degrees) . ... The pitch error is on the top and the roll error is on the bottom. ... The pitch and roll errors versus za. ...

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• M42 Color Images
• optics
• Arecibo Observatory L-Wide Band Receiver

... Dr. Ravil Nazirov is the head of the workshop, and Andrew Ananjev is the secretary of the workshop. ... The workshop is used to be held in the last decade of the month, preferably on Tuesdays. ... The next session will take place October 29, 1996 . ... There is "CONPAS" mailing list which you can join to discuss issues of problem solving and to be automatically notified of important dates and decisions with respect to the coming sessions. ... Secretary of the Workshop: Andrew Ananjev . ...

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• INTERBALL-TAIL KP changes
• CONPAS workshop: Sessions Archive
• mission1

... This is possible at modest cost due to the low moments of inertia of the telescope and enclosure. ... This same performance will be achieved in higher winds when the telescope enclosure is facing away from the wind, or by using wind screens. ... The telescope system (MILT) will be remotely operable with an on-site operator's assistance by an astronomer located at one of the ARC member institutions. ... Mean Wind Speed . ... Offsets > 10 deg: 1 arc sec rms max . ... 5 sec max, tracking to tracking . ...

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• Astrophysical Research Consortium - Apache Point Observatory
• lsst.coordConv: coordConv::Site Class Reference
• op010411

... These values are functions of the geographical (geodesic) latitude and the height of the point above the sea level. ... The option also permits to solve the reverse problem ? to calculate approximate values of observatory latitude and its height above the sea level depending on the introduced values of dxy and dz. ... It should be mentioned that low precision of dxy and dz for some observatories in the list maintained by MPC leads to negative value of height above the sea level for some of them. ...

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Application form for loan of NAG software used in Part I I Computational Physics Background The University enjoys a site licence for the NAG F95 compiler and numerical library installed on PWF-Linux. ... However, it is important that you read and obey these conditions. ... Summary of Licence The licence the tution, we may the copy must copy is unlikely University enjoys is institutional. While you can be considered part of this instiloan you a copy for use relating to the work of the institution. ...

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• Martin Krause - Publications
• Computing atmospheric absorption with AATM Bojan Nikolic web pages (r. 329)
• Computing atmospheric absorption with AATM

... Background scans are automatically loaded with the get_data procedure, but can be manually loaded, for example after computing the biases when the background has been zeroed before, using the following procedure. get_bgdata Backgroundtable created. ... We flag these data manually (just plot channel 11 and then use Util|Edit to flag; re-plot to check whether all the data has been flagged); when OYSTER averages point data, any data without valid background scans will be discarded. ...

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• Astrometry
• Reduce delay data
• Dispersion correction

... You are a hot-shot rocket pilot. ... So whenever there is a difficult rescue mission to be carried out in space, they call on you. ... You will use computer simulators, which accurately model the motions of a rocketship. ... They should run on any computer with a web browser and an internet connection. ... Your spacecraft is a yellow sliver. ... Your mission is to rescue Luke. ... His spacecraft has run out of fuel, and unless you rescue him, will continue to drift there for billions of years. ...

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• Computer Lab
• Workshops and computer labs
• Computer room

... In brief: the frequency-dependent radiative transfer equation is solved for a dust under assumption of spherically-symmetric geometry for its distribution taking into account particle size distribution and quantum heating effects for the very small dust particles. ... Table: Model parameters for IRAS04296+3429. ... parameter . ... hot dust shell) . ... The best fit to the spectral energy distribution of IRAS04296 is shown by heavy solid line (see Table2 for details concerning parameters of the model...

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• Vitaly Goranskij, SAI/Moscow Univ.
• shmidt_e
• harak_e

... This page includes download links to all the videos as well as some plugins you may need to view the videos on your computer. ... Click on a link to view the video, or right-click (PC)/control-click (Mac) the link to download the file to your computer. ... Videos Plugins: . You will need the most up-to-date video-playing software on your computer. ... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...

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• ASP: Annual Reports
• Mercury Magazine
• ASP: VOLVELLES! Early Paper Astronomical Computers

... The tracking system works in micro-step regime with a computer step of correction = 0.003 arcsec per second of time and a maximum speed of correction up to 4.6 arcsec per second of time. ... The APD module was constructed for performing experiments of receiving of 2 Mbps signals from ?ARTEMIS? using the Cassegrain focus of 0.7m telescope. ... GaAs PIN photo diode. ... Laser module with thermoelectric stabilisation of laser diode. ... Electronic module for turbulence compensation system . ...

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... You can use the Starlock Utility program to update your Starlock firmware. ... L X800 Telescope with Autostar II handbox Starlock wit h con necting cable Meade #507 con necting cable Meade RS232/USB adapter (if needed) Computer with Starlock Utility program Updated Starlock firmware Installation From the Meade website, download the Starlock firmware update to the computer desktop. ... If you have changed serial ports, click on the "Reset Con nection " button in the utility program. ...

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• Meade Instruments Corporation - #497 Autostar Computer Controller for ETX-90EC,
• Meade Instruments Corporation - Autostar Computer Controller Instruction Manual
• Meade Instruments Corporation - 2007 Product Catalog

It all started back in 1979 when the diskdrive manufacturer come with the bright idea to make a new transfer protocol. ... This protocol wasn't an ANSI standard, so NCR join Shugart and the ANSI committee X3T9.2 was formed. The new name for the protocol was, Small Computer Systems Interface, SCSI. ... ANSI finished the SCSI standard in 1986. SCSI-II devices was released in 1988 and was an official standard in 1994. ... SCSI is in opposite to IDE/ATA very flexible. ...

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• Procedures for Data Reduction
• HwB: RS422 9pin Connector (Offline)
• HwB: 72 pin ECC SIMM Connector (Offline)

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Cosmic Adventures . ... Cosmic evolution in a computer . ... V irgo Consortium astrophysicists used a 25-terabyte databank to create a computer simulation showing cosmic structure's evolution. ... Get instant access to subscriber content on Astronomy.com...

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• Besides computer simulations, what evidence do astronomers have to support the
• Astronomy and astrophysics rely heavily on computer modeling, but being neither
• Universe in a computer | Astronomy.com

... Copyright©1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

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