... Data . ... HST Overview . ... Cycle 24 Announcement . ... There are various sources of uncertainties when performing photometry with NICMOS that could affect the final accuracy of the measurements. In the following, several systematic uncertainties and special cases are mentioned. ... In summary, the accuracy of the absolute spectral energy distribution of NICMOS primary standards introduces a systematic uncertainty of about 2% - 3% in the absolute calibration of the filters. = 2.0 ?m) in NIC3. ...

... 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. ...

... Colorful Clouds Of Carina . ... Credit: Hubble Heritage Team ( AURA / STScI / NASA ) Explanation: Tumultuous clouds of the Carina Nebula , 8000 light-years away, glow in planet Earth's southern sky . Striking and detailed, this close-up of a portion of the famous nebula is a combination of exposures through six different filters taken with the Hubble Space Telescope 's Wide Field Planetary Camera 2 in April of 1999. ... The Colorful Clouds of Rho Ophiuchi . ... Carina Nebula Panorama from Hubble . ...

... Bad Astronomy . ... What Color is Mars? ... Bizarre Image Analysis . ... One image of Mars shows a giant green splotch . Some images show it to have a blue sky, others a red sky, and in yet others the sky is butterscotch. ... When the images from Mars are returned to Earth, and then processed to make a color image, what you are seeing at best is an approximation to what your eye can see. ... When that infrared filter greyscale image is used to construct a color image, the blue tab turns pink. ...

Eyepieces Forum Message . ... Post . ... Color Filters . ... Follow Ups | Post Message | ... If I were to get a few color filters for planetary observing with my 10" LX200GPS, what colors should I get? ... www.astronomy.net . About 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" . ...

Description and Specifications (html) ( pdf ) . System Block Diagram (pdf) . ... GALFA Spectrometer Setup, Operations, Basics Manual (pdf) . GALFA Diagnostic Software Overview . ... Polyphase Filter Bank . ... Design of Quadrature Downconverter Board (pdf) . Design of Low-Pass Filters (pdf) . Design of 16-Channel DAC/Gain Control Board (pdf) . ... Design of Digital Decimating FIR Filter (pdf) . ... Quadrature downconverter (August 9, 2004) . Spectrometer board (September 1, 2004) . ...

... 2001 June 17 . Colorful Clouds Of Carina . ... Striking and detailed, this close-up of a portion of the famous nebula is a combination of exposures through six different filters taken with the Hubble Space Telescope 's Wide Field Planetary Camera 2 in April of 1999. ... Exposures made with different narrow filters, as in this case , are translated to a visible color where shorter wavelengths are assigned bluer and longer wavelengths assigned redder colors. ... About APOD | ...

Astronomers usually measure the flux of an object by collecting light with a telescope, sending it through a known filter, and then determining the power. ... But astronomers usually give their photometric results in terms of magnitudes. ... Astronomers define an absolute magnitude that is independent of the distance of a star and only depends on the intrinsic properties of the object: the absolute magnitude is the magnitude the star would have if it were 10 parsecs away from the Earth. ...

COLOR PRINT OF NGC 4881 AND PART OF THE SURROUNDING FIELD This photo mosaic, which shows a field of distant galaxies, is a computer enhanced reproduction of a picture taken 4 March 1994 with the repaired Hubble Space Telescope. ... It is a 13th-magnitude elliptical galaxy in the outskirts of the Coma Cluster, a great cluster of galaxies more than 5 times farther away than the Virgo Cluster. ... We must find that peak ("turnover") in NGC 4881 in order to judge the distance. ...

... 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) . ... Digital systems . ... CSIRO ATNF Data Archives . Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ...

... In typical nightly use, the wide field and planetary telescope and cameras record images of favorably placed objects in the sky, including constellations, bright variable stars, nebulae through narrow-band filters, comets, the Moon, and planets. ... Shared Skies telescopes are available for use by students at the University of Louisville and the University of Southern Queensland, and by teachers and students in middle and high schools mentored by faculty at the universities. ...

... The NICMOS Parallel Program . Analysis . ... NICMOS observations made in parallel with the other HST instruments have produced an archive of over 2,000 images, covering a wide range of Galactic latitudes. ... The maximum sensitivity of these images is approximately 0.1 Jy, which should allow the detection of such astrophysically interesting sources as brown dwarfs in the solar neighborhood and star-forming galaxies out to z 3. ...

Infrared Detector Array Links . ... Control Software Links . Optics Links . Micro-Optics Links . ... Optical Materials Databases . ... Atmospheric Database Links . Linux Links . ... Rockwell Science Center home page. ... Santa Barbara Research Center home page. ... CCD-World home page. ... SDSU home page. ... EPICS home page. ... Optics Society of America . ... Linux on Laptops ( local site and US home page ). ... Instrumentation Links * Gemini Project Links * Other IR Instruments ...

... Tiny Tim has been used for generating Hubble Space Telescope ( HST ) point-spread functions (PSFs) for deconvolution, algorithm testing, proposal planning, and optical studies. ... Tiny Tim is a stand-alone program for simulating HST PSFs as viewed with the on-board imaging cameras (WF/PC-1, WFPC2, FOC, COSTAR/FOC). ... The measured aberrations for FOC f/96, WF/PC-1 PC6, WFPC2, and COSTAR/FOC are used by Tiny Tim . ... Figure: FOC f/96 observed and Tiny Tim model PSFs (pre-COSTAR) at 253 nm. ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Star Clusters . ... FLAMES . ... 100 Hours of Astronomy . ... IMAX€о 3D Film Hidden Universe . ... This image, the first to be released publicly from VISTA, the worldтАЩs largest survey telescope, shows the spectacular star-forming region known as the Flame Nebula, or NGC 2024, in the constellation of Orion (the Hunter) and its surroundings. ...

... 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) . ...

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. ...

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 . ...

... The Real Reality Show: Would aliens be anything like us? ... The Real Reality Show: All about the Drake Equation . ... The Real Reality Show . ... Why is one of the three filters in the Hubble palette ionized sulfur? Is Sulfur really that prevalent in the universe? ... RELATED TOPICS: SULFUR . Sulfur is not terribly abundant in the universe. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... Detailed information about each program can be found in the separate manual pages. blockmean L2 (x,y,z) data filter/decimator blockmedian L1 (x,y,z) data filter/decimator blockmode Mode (x,y,z) data filter/decimator filter1d Filter 1-D data sets (time series) fitcircle Finds the best-fitting great circle for a set of points gmtconvert Convert between ASCII and binary 1-D ... Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Display Data, EOS Trans., ...