... The "red leaks" in the UV filters are shown in Figure 3.10 for F122M, F160BW (the new Wood's filter), F170W, F185W F218W F255W, F300W, and F336W. The presence of significant red leaks in the UV filters, together with the much greater sensitivity and wavelength coverage in the red part of the spectrum, makes calibration of UV observations difficult. Table 3.13 shows red leak estimates as a percentage of the total detected flux from de-reddened stellar sources, ordered by spectral type. ...

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• ACS Instrument Handbook for Cycle 20
• Space Telescope Imaging Spectrograph Instrument Handbook
• ACS Instrument Handbook

XMM-Newton OM Response Files Page . ... Data Analysis SAS News What is SAS? ... The response files have the name om_effarea_<filter>_v2.0.rsp. The response files should be used in conjunction with a spectral data file containing the filter count rate. Such a data file may be created by editing the template filter file om_filter_default.pi with a fits editor such as 'fv' and changing the "RATE" and "STAT_ERR" entries in the SPECTRUM extension to the filter count rate and error. ...

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• Description
• FILTER_SIGNIFICANCE
• Effective Area, Filter Transmission, Quantum Efficiency and Grating attenuation

... The commands EXTINCT/LONG followed by RESPONSE/FILTER or by INTEGRATE/LONG and RESPONSE/LONG permit a one-dimensional response curve response.bdf to be obtained from the extracted ( e.g. , via EXTRACT/LONG or EXTRACT/AVERAGE ) and wavelength calibrated spectrum of a standard star. ... This response curve can be applied to a one- or two-dimensional extracted, wavelength calibrated and extinction corrected ( EXTINCTION/LONG ) spectrum by the command CALIBRATE/FLUX . ...

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• Artifacts
• mod_ext_filter - Apache HTTP Server
• TESTTA/CCD

12feb07 Measuring the SEFD around 1100 Mhz . ... bandpass filter low frequency falloff around 1130 Mhz . ... A 500 Mhz bandpass centered on 1100 Mhz (via the spectrum analyzer) showed a 6 db difference between 1100 Mhz and the noise floor at 1000 Mhz. ... The interim correlator was used with 25 Mhz bands centered at: 1040, 1060, 1080, and 1100 Mhz. ... 1040 Mhz cfr trking src(.gif) There is probably not very much sky signal getting into this band so it looks better than it should. ...

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• pdev_birdies_25jun07
• compare dlpf shapes
• alfa FilterBank switching test

... 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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• mod_ext_filter - Apache HTTP Server
• mod_cache_socache - Apache HTTP Server
• The ALMA project

... 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). ...

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• DIS Commands
• Suggested Exposure Times For Calibration Spectra
• Astrophysical Research Consortium - Apache Point Observatory

m33 _B_00107_df.fits TARGET = ' M33 ' / target EXPTIME = 100 . / exposure time (seconds) FILTER = ' (2) B (375-490)' / filter DATE-OBS = '2012-11-22T01:08:36.038' / date of observation (UT) m33 _B_00107_dfw.fits TARGET = ' M33 ' / target EXPTIME = 100 . / exposure time (seconds) FILTER = ' (2) B (375-490)' / filter ...

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• http://www.astro.louisville.edu/shared_skies/archive/select/ngc/ngc1499_california/20121121/log.txt
• http://www.astro.louisville.edu/shared_skies/archive/select/ngc/ngc1514/20121109/log.txt
• http://www.astro.louisville.edu/shared_skies/archive/select/messier/m42/20111031/log.txt

Next: Data Acquisition Up: CCD Systems and Previous: The ST-4 . One SBIG upgrade from the ST-4 is the ST-6. ... This system also uses a motorized filter wheel made by Compuscope. ... The TEC for this camera head is similar in operation to that of the Lynxx, however the ST-6 allows the temperature to be set. ... Used together with the ST-4, longer uninterrupted exposures are possible. ... A function in the software allows the operator to combine several short exposures to create a composite image. ...

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• Champlane Observation: CTIO 4m/MosaicII June 22-23, 2009
• Infrared Data
• Features of the PROS software

This library currently provides subroutines used to transform theoretical spectra to intermediate and broad-band photometric indices. ... Typical tasks are the response functions and transmission curves for various filters, mirrors and photomultiplier windows. ... The response is zero outside the given wavelength range. ... real . input . Wavelength in nanometres . PHOT_1P21 . ... PHOT_AIR . ... PHOT_ALUM . ... Inputs must be valid as for PHOT_FILTER, PHOT_AIR, PHOT_ALUM and PHOT_1P21. ...

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• SCL Sfit Commands

... 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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• Coronado 5mm Blocking Filter - Blocking Filters - Coronado€о Solar - Products
• Coronado 10mm Blocking Filter - Blocking Filters - Coronado€о Solar - Products
• Coronado 15mm Blocking Filter - Blocking Filters - Coronado€о Solar - Products

... 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

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... ATCA | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• lbaops:mark5evlbi [ATNF VLBI Wiki]
• VLBI Wiki | Main / Mark5eVLBI
• offpol

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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ntpdate [ -bBdosu ] [ -a key ] [ -e authdelay ] [ -k keyfile ] [ -o version ] [ -p samples ] [ -t timeout ] server [ ... ] . ntpdate sets the local date and time by polling the Network Time Protocol (NTP) server(s) given as the server arguments to determine the correct time. ... A number of samples are obtained from each of the servers specified and a subset of the NTP clock filter and selection algorithms are applied to select the best of these. ... The default is /etc/ntp.keys . ...

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• APOD: 2001 March 14 - Comet McNaught-Hartley
• CoolType - Stone
• CoolType - Mat Glass

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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• Practice in Astrophysics

Astronomy Picture of the Day . ... Credit: Philipp Rau Explanation: Christmas Day 2000 featured the final eclipse of the Second Millennium -- a partial solar eclipse visible from much of North America . ... From his location, at eclipse maximum (near picture center) just less than 50 percent of the Sun's diameter was covered by the Moon . ... Publications with keywords: eclipse - millennium - partial solar eclipse . Publications with words: eclipse - millennium - partial solar eclipse . ...

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• Journal "Peremennye Zvezdy"
• XWare > APOD

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. ... These galaxies have been missed to date but active surveys for them are underway. ... In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies. ...

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• Astro-2 and the UIT Experiment
• The Galaxy Gallery Page 6: Comparative Morphology

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
• CCD And What's Needed????? - an Astronomy Net CCD Equipment and Techniques

Laboratory work N7 Low-pass filtering. 1) Generate the signal with two periodic components and high-frequency noise. ... 2) Perform it's filtering with Panteleev filter 0 - h(t) = e 22 0 |t| 2 0 t 0 |t| cos + sin 2 2 , where 0 is a parameter. The frequency response of the Panteleev filter is ^ h( ) = 4 0 . 4 0 + 4 Select the cut-off frequency (by varying 0 ) for filtering out high-frequency periodic component and noise. 3) Plot the initial and filtered signal. ...

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• IDL programs

... 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 . ...

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• VISTA ETC - Exposure Time Calculator
• Observing with VISTA