... 0.1 DN rms . ... Error larger for warm pixels; absolute error uncertain because of dark glow . ... Visible, near UV . ... Residuals in CTE correction . ... 3% rms (at 100 DN) . ... Aperture correction . 4% rms focus dependence (1 pixel aperture) . ... 1-2% field dependence (1 pixel aperture) . ... 1% rms max (28 days after decon) (filters bluer than F555W) . ... 2% rms for broad and intermediate filters in visible . 5% rms for narrow-band filters in visible . 2-8% rms for UV filters . ...

... arfgen (arfgen-1.75.6) [?? ... arfgen simply constructs the appropriate quantities from the CAL, in the form of vectors of discrete energy-dependent elements, and combines these data multiplicatively to form the ancilliary response. ... This is already taken into account by the CAL in the call to CAL_effectiveArea. The user can enable or disable the effective area, filter transmission, QE or grating attenuation by setting the relevant parameter (eg modeleffarea ) to true or false respectively. ...

RTT150 . Russian-Turkish 1.5-m Telescope . ... Until 2002 observations were mostly performed with ST-8E CCD in the 1:7.7 Cassegrain focus. ... In April, 2003 telescope was equipped with a larger-size CCD Andor DW436 . ... 2048 x 2048 pixels, . ... Since summer of 2002 the main focal detector of the RTT150 telescope was AP47p CCD in 1:7.7 Cassegrain focus. ... During September 3-13, 2002 works on installation of new autoguiding system ( photo 1 ) were carried out on RTT150 telescope. ...

... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

... 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) . ...

SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...

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. ...

The computed band passes. ... The interim correlator input is filtered by 8 analog filters (50 Mhz wide at the 260 Mhz IF... one for each sub correlator). ... For bandwidths of 25 Mhz and below the real data stream is digitally down converted to complex samples I, Q streams. ... The Top figure is the halfband filter bandpass computed from the filter coefficients. ... The computed filter has aliased power, extra IQ filtering, and two applications of the filter on the resulting real bandpass. ...

Astronomy Picture of the Day . Emission Nebula IC 1396 . ... 5.08.2004 . ... Credit: Richard Crisp Explanation: Sprawling across hundreds of light-years, emission nebula IC 1396 mixes glowing cosmic gas and dark dust clouds . ... Emission from sulfur atoms is shown in red, hydrogen atoms green, and oxygen in blue. ... August . ... August 2004 . ... Publications with keywords: emission nebula - star formation - hydrogen . Publications with words: emission nebula - star formation - hydrogen . ...

... Figure 1 shows some synthetic test data u(n) to which random noise v(n) is added. ... for the above simulations % % % % % Explore the use of eigenanalysis techniques in post detection digital signal processing for noise rejection Potential application include spectroscopy and imaging Jon Bell 24 Jul 2000 clear % Make some fake raw data nspec = 120 ; ntime = 10; scale = 1.0; noisescale = 1.0; dcoff = 0.0; psi =1.0; j=1:1:nspec; k=1:1:ntime; rawdata = sin(j/3) + sin(j/5) + 1; rawdata = ( ...

Voyager 2 green filter image of Neptune showing the Great Dark Spot (GDS). ... Centered at 20 S, the system rotates counterclockwise with a 16 day period. ... Central Latitude/Longitude (deg): N/A . ... Instrument: Narrow-angle Vidicon Camera . ... Instrument Field of View (deg): 0.424 x 0.424 . ... Phase Angle (deg): N/A . ... NASA Image ID number: FDS 11314.35 . ... Code 633, NASA Goddard Space Flight Center . Greenbelt, MD 20771, USA . ... Code 630, NASA Goddard Space Flight Center . ...