... The active time at each angular bin is the sum over frames of the active time contributions from all CCD pixels, within the node-specific telemetry window, which overlap the surface of the bin. ... The active time, per frame, of a normal pixel is the full frame integration time multiplied by the node-specific fractional exposure; bad pixels contribute no active time. ... If an event is rejected for this reason only, then its pixels remain normal in the exposure map. ...

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• Input Files

WFC3 Instrument Handbook for Cycle 24 . ... Wide Field Camera 3 Instrument Handbook for Cycle 24 > Chapter 2: WFC3 Instrument Description > 2.3 Spectral Elements . ... 2.3.1 The Filter Selection Process . ... Both WFC3 channels are equipped with a broad selection of spectral elements. ... The UVIS channel has a selectable optical filter assembly (SOFA) that contains a stack of 12 filter wheels housing a total of 48 elements: 42 full-frame filters, 5 quad filters, and 1 UV grism. ...

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• Apertures
• Time Dependence of UV Response
• Introduction

... Apache HTTP Server Version 2.4 . ... Filter Input (request) and Output (response) content using sed syntax . ... sed_module . ... mod_sed is an in-process content filter. ... However, unlike sed , mod_sed doesn't take data from standard input. Instead, the filter acts on the entity data sent between client and server. mod_sed can be used as an input or output filter. mod_sed is a content filter, which means that it cannot be used to modify client or server http headers. ... mod_sed . ...

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• Mail Filters
• mod_ext_filter - Apache HTTP Server
• Filters - Apache HTTP Server

Not on-site at APO, but can be obtained on loan--contact Jeff Morgan at UWash, morgan/astro.washington.edu . CENTER( ) PASSBAND( ) NEBULAR LINE (OR CONTINUUM) . 4861 60 Hbeta 5007 60 [O III] 6301 10 [O I] -- [S III]6312A line is supressed 6563 10 Halpha -- [N II]6584 and 6583 lines are suppressed 6583 10 [N II] -- Halpha line is suppressed 6728 80 [S II]6717+6731 4686 60 He II 4760 100 blue cont or Fe II 8290 195 red cont. See also the Hodge filter set below. ... APO Filters Homepage ...

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• TUI:TUI Menu:Log Windows
• Astrophysical Research Consortium - Apache Point Observatory
• DIS Keywords

Next: Column FILTCODE_ n Up: Passbands Previous: Passbands . The column named BAND gives the standard name of the band. ... Standard values for the BAND column are: . ... Notice that each distinct type of measurement counts as a separate band entry, including measurements made with different neutral-density filters, red-leak, and dark measurements. ... The column named NBAND contains an integer used for cross-referencing. ... Normally, this is the reference column for the whole table file. ...

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• JavaScript Mail Filters in Navigator 4.0
• The Wiener-like filtering in the wavelet space
• Background estimate by filtering

This document contains a summary of the user interface for filtering rows in binary tables. Table filtering allows a program to select rows from an table (e.g., X-ray event list) by checking each row against one or more expressions involving the columns in the table. When a table is filtered, only valid rows satisfying these expressions are passed through for processing. ... select rows whose pha value is exactly 10 . ... 10 pha select rows whose pha value is in the range of 10 to 50 . ...

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• QPOE Files
• Spatial Region Coordinates
• Event Filtering

... It contains 2 (1 for each polarization) by 4 separate filters that are switch able via the computer. filter 1 is a motor driven tuneable filter covering 1000 to 2000 Mhz with a 2% bandwidth. filter 2 is a ??? . ... An hp34907 dac generates a voltage that corresponds to the requested frequency. ... It steps the filter from 1000 to 2000 Mhz in 25 Mhz steps. ... You now have 41 requested voltages and measured frequencies going from 1000 to 2000 Mhz. ... 20 Mhz) when fit over the 1000 to 2000 Mhz range....

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• http://www.naic.edu/~phil/lbw/filters/lbw_filter3b_mar06.html
• http://www.naic.edu/alfa/galfa/docs/galspect/spectrometer/galfa-fir.pdf
• http://www.naic.edu/~phil/rfi/327/327_filters/rf_filters_jan06.html

The build the executables: make To install the executables and set_camera_filter link in /usr/local/bin/ make install To uninstall the executables make uninstall To use the IFW filter wheel from within xmccd, you need to specify an external filter wheel option in the configuration file by setting ccd.filter_wheel = 1 in prefs.ccd By default, XmCCD will try to automatically configure an SBIG filter wheel on SBIG cameras, or follow a configuration file directive. ...

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• http://www.astro.louisville.edu/shared_skies/archive/select/ngc/ngc7320_stephans/20111031/log.txt
• ExtendedPlugInFilter (ImageJ API)
• Filters (ImageJ API)

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Maximize a minimum filter . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• filter | Astronomy.com
• Filtered solar views | Astronomy.com
• How do light pollution filters work? Do they actually help? | Astronomy.com

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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• Baader NEODYMIUM (Moon & Skyglow) filter

XEphem Forum Message . Forums: . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... Post . ... Re: Re: Filter Based On Catalogs? Forum List | ... Post Message | ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Re:Suggestions For Light Pollution Filters Wanted - an Astronomy Net Eyepieces
• Re: Filter Based On Catalogs? - an Astronomy Net XEphem Forum Message
• Colour Filter On A CCD - an Astronomy Net CCD Equipment and Techniques Forum

... Parameters . Filters . ... Direct images . ... The SCORPIO-2 project: . Spectral Camera with Optical Reducer for Photometric and Interferometric Observations - 2 . The broad-band glass filters made in SAO RAS are used for the observation in the Johnson-Cousins (UBVRI) photometric system in the direct images mode. The glass filters transmission curves are shown by solid line. ... The filters transmission curves of the `comets' filters measured with the SCORPIO-2 in the F/4 beam. ...

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• GRB follow-up team
• LSFVO: SCORPIO project
• SCORPIO: Direct images

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 . ...

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• Space Telescope-European Coordinating Facility
• HSTPOLPOINTS (V1.00) --- May99 --- HSTPOLPOINTS (V1.00)
• HSTPOLSIM (V1.00) --- April99 --- HSTPOLSIM (V1.00)

... This subset may be a channel, beam id or scan id selection. ... integer (e.g. 1) or a range (e.g. 1-300). ... Default : no default channel = 1-54 # Defines the number of channel to average to form the one output channel # Default : 1 width = 54 **Example 3** Finally, the following example demonstrates averaging a single measurement set with 16416 spectral channels by a factor of 54, creating a single output measurement set . i.e. 16416 x 18.5kHz channels to 304 x 1MHz...

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• casacore: casa::LogSinkInterface Class Reference
• mssplit (Measurement Splitting/Averaging Utility) CentralProcessor 0.11
• casacore: casa::MemoryLogSink Class Reference

. Next: The Hierarchical Stellar Systems Up: Data files Previous: Spectroscopy Contents . Photometry data files have the extension .mag . The following gives an example for Algol, where the columns are the component designation, filter name, the Julian date of observation, and value and error of the magnitude measured. The filter names must be one of Hp, U, B, V, R, and I. ABC V 2445249.299 -2.60900 0.001 ABC V 2445249.304 -2.60000 0.001 ABC V 2445249.313 -2.59200 0.001 . Christian Hummel 2015-04-28

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• DFOS: tune your browser
• Procedure to be followed by DMD secretary for DFS Group documentation
• ESO - Release Description

RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...

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... Meade Instruments Corporation . ... Meade Pictor 616A Color Filter System Instruction Manual . ... Remove the Meade Pictor 616A Color Filter System from the telescope or camera. Use the supplied hex wrench to remove the three screws from the telescope side of the Meade Pictor 616A Color Filter System. Position your Meade Pictor 616A Color Filter System to align with the diagram below. ... Carefully screw each filter into the wheel, and re-assemble the Meade Pictor 616A Color Filter System. ...

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• Blocking Filters - Coronado€о Solar - Products
• Meade Series 4000 Photo-Visual Color Filters
• Coronado 10mm Blocking Filter - Blocking Filters - Coronado€о Solar - Products

Stellarium 0.12.3 . ... TelescopeClient Class Reference abstract . ... getEnglishName (void) const . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getJ2000EquatorialPos (const StelCore *core) const =0 . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getSideralPosGeometric (const StelCore *core) const . ... getPositionInfoString (const StelCore *core, const InfoStringGroup &flags) const . ...

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• Stellarium: TextureParams Struct Reference
• Stellarium: TelescopeClientDirectNexStar Class Reference
• Stellarium: TelescopeClientDirectLx200 Class Reference

These are tips I've either worked out myself or gathered from the discussions on the Gimp Mailing list. ... I didn't put up images for each of them because that would take up alot of disk space and my ISP charges a premium for disk space. ... Basic Text Tricks . ... Duplicate the image ( filters/channel ops/duplicate ) . ... Vertical: yes Offset the blurred image ( filters/channel ops/offset ) . ... Blur the image ( Filters/Channel Ops/Blur ) . ... Blur the image using Filters/Channel Ops/Blur . ...

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• CoolType - Glass
• Light Curve Templete/Observing Form For Visual SNe Observers.
• APOD: 2014 July 11 - Spotty Sunrise over Brisbane

A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

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