... Chapter 12: Cosmic OriginsSpectrograph (COS) > 12.11 Mode = TIME-TAGConfig = COS/NUV . ... 12.11.3 Wavelength . ... Note : No wavelength should be specified if MIRRORA or MIRRORB is the Spectral Element. ... Specifies the estimated minimum time in which 2.35 x 10 6 photon events (half of the COS data buffer capacity) will be accumulated during a TIME-TAG exposure. ... FP-POS . ... The values FP-POS=1, 2 or 4 will result in the exposure being taken at an offset from the specified central wavelength. ...

... Up: Iraf Packages . ... IRAF Group, NOAO 1 , PO Box 26732, Tucson, AZ 85726 . This paper describes a new IRAF spectroscopy exposure time calculator. ... SPTIME takes an input source spectrum, either a reference blackbody, power law, or a user spectrum, a background ``sky'', observing parameters such as exposure time, central wavelength, seeing, airmass, and moon phase, instrument parameters such as aperture sizes and detector binning, a description of the spectrograph, and desired output. ...

... First of all, I should say that you cannot guarantee user-mode processes to have exact control of timing because of the multi-tasking nature of Linux. ... However, for most applications using I/O ports, this does not really matter. To minimise this, you may want to nice your process to a high-priority value (see the nice(2) manual page) or use real-time scheduling (see below). ... Linux 2.x kernels have soft real time support; see the manual page for sched_setscheduler(2) for details. ...

Next: Dynamic Scheduling Up: Scan Times Previous: Dealing with Formatter Reconfigurations Contents . The nominal scan start time, if set using DWELL , is the time good data is expected to be available. ... The more modern systems, especially the Mark5C recorders and the software correlators, approach this ideal and the recordings are started at the time specified in the VEX file for the start of good data. ... A recording scan is the time between stops of the recording media. ...

XMM-Newton Science Analysis System . ... xxxx-xx-xxTxx:xx[:xx.xxx] (FITS date and time) jdxxxxxx.xxx (Julian day) mjdxx.xxx (modified Julian day) yxxxx.xxx (decimal year - Not yet implemented) [-]xxxx[.xxx] (seconds since XMM reference time) xxx xxx xx xx:xx:xx xxxx (calendar format) . ... 1997-10-13T00:00:00.000 (FITS date and time) jd2450734.5 (Julian day) mjd50734 (modified Julian day) -6.912e+06 (seconds since XMM reference time) Mon Oct 13 00:00:00 1997 (calendar format) . ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

The determination of the detector parameters is based on sets of images of a spatially uniform-illumination scene (flatfield frames) and without any illumination (dark frames), putting a plug in place of the filter, taken at a series of exposure times. ... We interleave before and after each exposure time in the series of flatfield frames a set of reference images at an exposure time of 1 sec to determine the possible temporal variation of the illumination level. ...

Next: Parameters Up: How to use CONSTRICTOR Previous: NPOI raw data files Contents . The parameter file contains information for CONSTRICTOR on the location of the raw data files, start and stop times, integration time, etc. ... The parameter file, YYYY-MM-DD.par , can now be created using the rawlist procedure of . ... Check beginning and tail of the listing for each file. ... Next: Parameters Up: How to use CONSTRICTOR Previous: NPOI raw data files Contents Christian Hummel 2015-04-28 ...

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... Central astronomical observatory at Pulkovo of Russian Academy of Sciences . ... INTAS 2001-0550 "The Solar-terrestrial climate link in the past millennia and its influence on future climate" . ... Programs of Presidium of Russian Academy of Sciences "Non-stationary phenomena in astronomy" . and "Solar activity and physical processes in the Sun-Earth system" . Program of Division for Physical Sciences of RAS No 16 "Solar Wind" . ...

Next: Signals and their Up: Time Series Analysis Previous: Introduction . The practical problems in the analysis of time series concern . the detection of a signal against noise, . the estimation of the parameters characterizing the signal, and . the presentation of the results. Presentation and/or evaluation of the results involves a function of the time series called statistics. ... Signal detection . ... Time domain analysis . Presentation and inspection of results . ...

... Fullerenes as Miniature Cosmic Time Capsules . ... The discovery involves small molecules that can apparently become trapped during the formation of large enclosed molecules known as fullerenes , or bucky balls. ... How these fullerenes formed, how they survived, where else they can be found, and what else might be found inside these tiny time capsules is developing into an exciting area of research. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

... Future seminars . P a s t seminars . Seminar council . The emission time of Gamma-Ray Bursts" . A. Sanin (IKI) . ... The three new parameters of cosmic gamma-ray bursts are introduced: the emission time, the peak energy of the emission time spectrum and the cosmological invariant parameter. ... Using this distribution the "collective estimation" of the best fitting redshifts for the group of long bright gamma-ray bursts detected by BATSE experiment was found. ...

... 2003 January 19 . Fullerenes as Miniature Cosmic Time Capsules . ... Explanation: Scientists have found, unexpectedly, tiny time capsules from billions of years in the past. ... Extra-terrestrial fullerenes inside the meteorite survived, and upon inspection, were not empty inside . ... How these fullerenes formed, how they survived, where else they can be found, and what else might be found inside these tiny time capsules is developing into an exciting area of research. ... About APOD | ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Here we present the ionospheric parameters variations for quiet conditions. ...

Next: Gaussian Chirplet Transform (GCT) Up: THE CHIRPLET Previous: Notation . The STFT is a mapping from a one-dimensional function (the domain , which is a function of time) to a two-dimensional function (the range , which is a function of time and frequency). ... The new mapping we so obtain is a mapping from the one-dimensional domain (time) to a three-dimensional range (time, frequency, and log-scale) that we previously referred to as the TFS parameter space (Fig. 1 (a)). ...

apomask -- Create an apodizing mask image with zero background and a circular central mask with rounded off edge apomask output xdim ydim radius sigma k xpos ypos . output = "" [image] . ... The X dimension of the input image. ydim = 512 [integer] . The Y dimension of the input image. radius = 12.0 [real] . The radius of the central disk of the output image which is to be set to one. sigma = 2.0 [real] . The sigma of the roll-off region around the central disk. k = 0.5 [real] . ...

... IRAF supports two kinds of parameters, auto parameters and hidden parameters, which are treated differently. auto parameters are updated every time a task is run. ... Parameters for each task are contained in `parameter files' in the uparm sub-directory in `myiraf'. ... im > imhead.longheader=yes # explicitly setting <task.param>=<value> im > eparam imhead # Edit the parameter file to update one or more # parameters at the same time # see next section . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Stars . ... Space Flight . ... New observations with the European Southern Observatory (ESO)тАЩs Very Large Telescope of some of the most distant galaxies ever detected are revealing the mysteries of this important phase of the early Universe. ... These powerful instruments are essential for exploring this early period in cosmic history as they alone can enable the accurate observations of €аthese extremely distant and faint galaxies. ...