... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... HST . WF/PC-1 Instrument Science Reports . ... Missions . ... Data . ... Annual Reports . ... Hubble Heritage Project . Future Missions and . ... Missions Office . ... HST Peer Review Process . Hubble Fellowships . Science Blog . ... HST Overview . Overview . ... Servicing Missions . ... Cycle 24 Announcement . Cycle 23 Results . ... Mid Cycle Submission . ... Phase II Cycle 23 . ... Reporting Problems . Retrieving HST Data . ... HST Science Year in Review . ...

Next: Fitting the Blaze Up: Instrument Response Correction Previous: Instrument Response Correction . ... This flux has to be corrected for two effects in order to get absolute fluxes: first, for the echelle blaze effect, and second, for the chromatic response of the instrument. ... The solution adopted in the reduction, using the standard star љ , is to correct for both the blaze effect and the instrument response simultaneously. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... LX70 Series . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... LightBridge Series . ...

... Science Users Information > Data Handling and Products > Data Reduction FAQ > Why are my spectra not flux calibrated, even though there are standard star observations in the data set? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... Data Handling and Products . ... Data Pipelines and Calibrations . ... ESO Data . ... ESO Data Access Policy . ... If there is no reference table for the flux standard star no response curve is created and therefore the science data are not flux-calibrated. ...

Next: Examples of Setup Files Up: Setup Files Previous: Setup Files Contents . Over 200 standard setup files have been created, covering many of the normal modes of observing. ... These especially include precisely defined, and somewhat complex cases like the Mark III standard modes (although MarkIII went the way of the dinosaur long ago. ... v '' files: . These are setup files for VLBI observations using VLBA recording formats. ... These are setup files for Mark III observations. ...

OSSERVATORIO ASTROFISICO DI ARCETRI CENTRO PER L'ASTRONOMIA INFRAROSSA E LO STUDIO DEL MEZZO INTERSTELLARE LARGO ENRICO FERMI, 5 -- I­50125 FIRENZE Firenze, September 30, 1994 FROM: C. Baffa TO: Tirgo Staff SUBJECT: Data handling with Tirgo Nicmos3 instruments All data taken with Tirgo Nicmos3 instruments (Arnica and Longsp) are stored directly as standard FITS files at 16 bits integer format. ... The acquisition program never rewrites over an old file. ... An example in table 1. ...

Optical and UV Spectrophotometric Standard Stars . ... Apache Point expresses its thanks to J. R. Walsh and to ESO for allowing us to place a copy of these pages at Apache Point. ... Access to the standards is either through: . ... The data for the standard stars come from four sources: . ... Data for 23 stars based on IUE and optical spectra and calibrated by the primary WD standards. ... The data from which the plots were produced are also available by ftp access from the standard star pages. ...

... The sky position of a single source may be entered via the parameters ra , dec and (optionally) errorradius . ... In this mode, the output positions are printed to a single line of standard output. The format of this output line is given in the following examples. Example 1: command line . ... Source RA = 56.917500 deg. Source dec = 24.365171 deg. # # rawX rawY ccd 32 188 8 . Example 2: if you want to display the numbers only, add withheader =`no' to the command line. ...

... The procedure simply observes ON your source for x minutes and then takes a `blank sky' observation OFF your source for the same amount of time and tracking the same azimuth and zenith angle range. ... Typically, observing times are kept to within 5 minutes (with 5 minutes as the most efficient, and therefore default, choice). ... If your scans are for 5 minutes or less, your wait time should be set to 1 minute (the default setting). ... A 5 minute ON/OFF + 10s CAL takes 11.3 minutes. ...

... The SIRTF Science Center is developing two Web-based tools that will be used during operations. One tool is for Quality Analysis. ... The basic design requirements for the QA tool are (1) that it provide an easy way of looking at all the data, observation by observation, and (2) that it provide an easy way to specify status and comments for each observation. ... The data accessed by this tool consists of meta-data in the central database as well as the actual data files in the archive. ...

Bridge World Standard Bridge World Standard (BWS) is a system based on the majority preferences of approximately 125 leading experts and thousands of Bridge World readers. ... Jacoby transfers (splinter rebids; game raise is slam try; two diamonds plus two spades forcing only one round); two spades shows minors; three hearts invitational, major two-suiter; Texas transfers; Stayman (two-spade rebid invitational; two-heart rebid weak; minor rebid forcing); Smolen; three of a minor invitational; Gerber. ...

INFRARED FOURIER-SPECTROMETER SICH-F . ... Instrument work regimes: 1) Inside. 2) Calibration at inside standard sources 2 - 4 times per a rotation. 3) Calibration at "free space" 2 - 4 times per a rotation. 4) Infrared radiation measuring 10 - 40 min. per a rotation. ... Spectrometer consists of the photodetector block and the block of signal processing and control. ... Diagnostic information and attach data will transfer by state telemetric channels. ... Detector temperature. ...

This section of library contains information about "classic" Star Catalogs. ... For a Henry Draper Catalog 272149 stars have received a total of 531,211 identifications in 7 сatalogs: . 270456 - in Astrographic Catalogue ( "Carte du Ciel", 4M), . 251943 - in Guide Stars Catalog (GSC), . ... A file with information on the components of 1788 of multiple systems in catalog HDEC (3681 component, or a combination thereof, with 4054 recording). ... A file with information about 21971 variable stars. ...

... The material in "From Stargazers to Starships" meets several important requirements of the national standards. Pages cited below are from National Science Education Standards National Academy Press, Washington 1995. ... For example: the sections on astronomy not only describe calendars and sundials (including their construction), but also the astronomy of the ancient Greeks, including two different ways in which ancient Greeks estimated the distance to the Moon. ...

Appendix: COODINATES OF OBSERVATORIES . This list is the extension of Marsden's list of observatories published in тАЬMinor Planet CirculariesтАЭ. ... тАЬThe Astronomical Year-Book for the year 1942тАЭ, 1941, p.355-360, in Russian . ... The numbers 0-999 were taken in according to Marsden (Ref.1), the numbers from 1000 were appropriated by us. ... For observatories with numbers 0-999 and code of reference 1* the heights were taken by maps . ... For numbers 0-999 the code equals 1 usually. ...

... Observations . ... Centre de Donn es sur les Satellites Naturels. ... Nomenclature des satellites | ... Satellites de Mars . Satellites proches de Jupiter . ... Satellites lointains de Jupiter . Satellites proches . ... Satellites proches de Saturne . ... Satellites lointains de Saturne . Ph?nom nes mutuels des satellites principaux . Satellites proches d'Uranus . Satellites principaux d'Uranus . Satellites lointains d'Uranus . Ph?nom nes mutuels des satellites d'Uranus . ...

Inscrivez-vous †а la newsletter | ... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit†йs . ... les plus belles images de l'Univers d†йcrypt†йes pour vous . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil †А la une Lunettes et T†йlescopes . ... Vous vous interrogez sur la pr†йsence de vis de r†йglage †а proximit†й des miroirs de votre t†йlescope ? ...

... The software enables to browse HITRAN-86 or 96 databases. It enables input first 7 atmospheric gases. ... calculate atmospheric transmittance on any pressure level, . calculate instrument transmission functions through the atmosphere, . ... The software is supplied by standard atmospheric profiles, extracted from FASCODE_3.0 FORTRAN codes (dowloaded from PL/GP), and by instrument response function for IR channels of NOAA 14 satellite (both AVHRR and HIRS, downloaded from NOAA/NESDIS). ...

... Fortranљ66 . ... Fixed form . ... Whole Fortranљ66 . ... Continuation line indicated in column 6 . ... Blank line as comment . ... Extension in Unix .f .f .f .f90 .f .f90 . Extension in DOS .FOR .FOR .FOR .F90 .FOR .F90 . ... This applies to both fixed form and free form source code. ... Fixed form of the source code is discouraged in Fortran 95! ... In UNIX there is no concept called extension, and the extensions are not specified in the Fortran standard, but in informal manufacturer standards. ...