... 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: . ...

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

Computer Ephemeris. Reduction quantities for Sidereal time. Explanations. Each row contains for the date specified at 0 h of Time Dynamical Sidereal: . sidereal julian day, . interval from date to mean epoch T m expressed in julian years, . reduction quantities A+A', B+B', C, D, (all in seconds of arc), E (in 0.0001s), A', B' (in 0.001). The same table, but for moments, expressed in Dynamical Time is to be found on 'Reduction. Dynamical time.' page. ...

. The amount of CPU time used by this process.

... I got six, that's all there is. Six time one is six; one times six. ... I put mine with his, and we got twelve. Six time two is twelve; two times six. ... Six time three is eighteen; three times six. ... I got six red hens, they laid five eggs each. ... Oh, six times six is 36; six times six. ... Put 'em in one bag, that's 42.> ... Nine hungry men had six dollars each. ... Six time nine is 54; nine times six. ... Six time twelve is 72; twelve times six. ... Six times one is six; one times six. ...

Extended time series of Solar Activity Indices (ESAI) is database including observational, synthetic and simulated sets to study Solar magnetic field variations and their influence on the Earth. ESAI extend the ordinary lengths of some traditional indices of solar activity: sunspot areas, Wolf numbers (equatorial component of magnetic field of the Sun), polar faculae numbers (polar component), mean latitudes, N-S asymmetry of hemispheres (location of activity). Series . ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Publications of the ASP (PASP) . ... Mercury's Time to "Shine" . ... As seen from Earth, three celestial bodies sometimes pass in front of the Sun: the Moon, Venus, and Mercury. And in November, it is Mercury?s turn. ... Transits of Venus are very rare, indeed?none occurred in the entire 20th century?but Mercury transits the Sun about thirteen times every century. ... publications . ...

... Telescopes . ... The 1-m telescope ZEISS-1000 time allocation committee . ... 1-m telescope time request ----------------------------------------------------------------------- Request ...... 2000 1d half year 1m telescope Received.. ... Results of observations obtained by applicants at the 1-m telescope on other programs over the last years (publications, reports).. ... Deadline for submitting Z-1000 time requests of the 6-m Telescope Program Committee outside applications - March, 1 September, 10....

Inscrivez-vous –Љ la newsletter | ... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit–їs . des reportages . ... Accueil Time-lapse : Recr–їez le mouvement du ciel en vid–їo . ... Nous vous expliquons pas –Љ pas comment r–їaliser –Љ partir d'une s–їrie de photos ces petites animations appel–їes time-lapses (voir l'article вАЬacc–їl–їr–ївАЭ sur wikipedia). ... Si vous souhaitez partager vos vid–їos et –їchanger sur le sujet, rendez-vous sur le forum de Ciel et Espace . ...

... Does the time it takes different methods to create all the elements coincide with the universeт??s accepted age? ... Illinois Urbana-Champaign) Different kinds of stars create elements at different rates, all of which are consistent with the age of the universe. Get instant access to subscriber content on Astronomy.com! ... Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below. ...

This module provides for the generation of Expires HTTP headers according to user-specified criteria. ... This module controls the setting of the Expires HTTP header in server responses. The expiration date can set to be relative to either the time the source file was last modified, or to the time of the client access. ... ExpiresByType . ExpiresDefault . The ExpiresDefault and ExpiresByType directives can also be defined in a more readable syntax of the form: . ... Module: mod_expires . ...