... Posts tagged ?calibration? ... Posted by hlee . ... Comment . ... Category: Algorithms , arXiv , Astro , Cross-Cultural , Data Processing , Jargon , Methods , Misc , News , Quotes , Spectral , Stars , X-ray | ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

. Home . News . Gallery . Events . Twitter . Press Releases . Links . Contact Us . Calendar . Press & Web Coverage . As part of International Year of Astronomy 2009, the Irish Astronomical Association (IAA) is pleased to announce a major public competition, with substantial prizes, for all ages, and in various categories, so that anyone can enter. Full details here . International Year of Astronomy, Ireland National Node . [Back To Top] .

Next: Self-Calibrating with Multiple Models Up: Computation Previous: Computation . Both selfcal and gpscal produce antenna gain tables in the same format as the calibration tasks previously described. ... Finally, if the primary gains have appreciable XY phase (for any antenna for selfcal , but for the reference antenna only for gpscal ), or significant amplitude gain mismatches (for selfcal only) then these corrections should be applied to the data before self-calibration. ...

... The routine processing of STIS data in the calibration ``pipeline" requires an interrelated set of software tasks and databases developed and maintained by many groups at STScI. We present the systems-level design of this calibration pipeline from the perspective of the STIS instrument group at STScI. We describe the multiple interfaces to the pipeline processes that the STIS group works across in an effort to provide for the routine calibration of STIS data. ... For example, the STIS group: . ...

... In , the visibility amplitudes and phases of the program stars are calibrated using calibrator stars, for which those variables are modeled and the resulting model coefficients transferred to the program star data. ... When calibrating the data, the user should begin by looking at the calibrated and normalized amplitudes first to see whether the data has already been calibrated (for example when a .cha file was read). ... In the case of visibility phases, there are no normalized quantities.) ...

... A data set contains a science frame, all its associated raw calibration frames and the master calibration frames created by combining and processing the raw calibration frames. ... Either one creates a MIDAS catalogue which contains the names of all single calibration frames to be combined in to the master frame, or, in the case of pipe line reduction, one use the Association Table. ... The names of single calibration frames are however also available in the Association Table. ...

... Recent Topics . ... MAO main . ... IAU e-Newsletter - Mercury Crater-naming Contest Winners Announced . ... Тема: IAU e-Newsletter - Mercury Crater-naming Contest Winners Announced . IAU e-Newsletter . IAU Press Releases . Mercury Crater-naming Contest Winners Announced - Winners selected by the IAU from 3600 submitted names* . ... See latest IAU announcements on www.iau.org/news/announcements/ . ... MAO NASU . ...

... the alfa calibration results (.ps) ( .pdf ): . the pointing error vs rotation angle offset (.ps) ( .pdf ): . ... Comparing the two lets you separate out the alfa installation errors with general telescope pointing problems (from the beam repair). ... Part of the pointing error could come from the alfa rotation angle being off. ... Compute the change in the pointing error if the alfa rotation error was off by -5 to +5 degrees in .1 degree steps. ... Top: rms pointing error vs rotation angle offset. ...

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

... Class . ... Packages that use Calibration . ... TextEncoder ( ImageProcessor ip, Calibration cal, int precision) . Constructs a TextEncoder from an ImageProcessor and optional Calibration. ... ImageStatistics. getStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... ByteStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... ColorStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... FloatStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ...

... Planets . ... The planets were found using the HARPS instrument on the 3.6m telescope at ESOтАЩs La Silla Observatory. ... A planet in orbit around a star causes the star to regularly move towards and away from observers on Earth. ... One newly discovered planet, HD 85512 b, is best hope found so far for a habitable exoplanet. ... The HARPS team so far have found that about 40% of stars similar to own Sun have at least one planet smaller than Saturn (which is 95 times more massive than Earth). ...

Peremennye Zvezdy", . ... Epoch(max): . ... The variability of ST UMi was discovered by V.P. Goranskij and announced by Veremchuk (1982). It was found to be an RRAB star varying between 14 m .0 and 15 m .8 (pg), with the light elements Max hel = 2444074.380 + 0 d .5317771 x E, from plates of the Moscow collection (JD 2443026 2444261). ... Light Curve . ... The O C diagram plotted using the light elements from Veremchuk (1982). ... See text for light elements used to plot each of the light curves. ...

... Published spectra . Published k-corrections (Bessel & Brett filters) . K-corrections using CIT filters . Filters used for the integration: U B V Rc Ic J CIT H CIT K CIT . Filters used for the k-corrections: J BB H BB K BB . New calibration of the spectra: set the desidered colors (Johnson BV- Cousins RI- CIT JHK) in the table below, press "SUBMIT" and save the output as text file. ... Spectra of individual galaxies ( calibrated in lambda and flux and normalized to average=1) . ...

... 2000 September 3 . Henrietta Leavitt Calibrates the Stars . ... Explanation: Humanity's understanding of the relative brightness and variability of stars was revolutionized by the work of Henrietta Swan Leavitt (1868-1921). ... Leavitt discovered and cataloged over 1500 variable stars in the nearby Magellanic Clouds . From this catalog, Leavitt discovered that brighter Cepheid variable stars take longer to vary, a fact used today to calibrate the distance scale of our universe . ...

... Flats : Properly exposed flats over all echelle orders require a two-step process. Flats are taken both with and without a CuSO4 (aka "blue") filter in the beam. ... Suggested exposures are 7 seconds ("red"; no filter) and 240 seconds ("blue", CuSO4 filter) yielding S/N values of ~480. The filter for "blue" flats is listed as "blue" in the Config window in Echelle control under Remark. ... Exposure times for objects can be derived from the following plot: . ...

Test stand for geometrical calibration of imaging cameras . determination of the elements of internal orientation for imaging cameras as well as the parameters of mutual orientation of the internal and instrument coordinate systems . Test stand for photometric calibration of imaging spectrometric cameras . determination of the spectral and radiance characteristics of the imaging systems . ... Test stand for determining radiation stability of components . ...