... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

EPIC - MOS Contamination Monitoring 1E0102 - Rev 0065 - Thin Filter Black (MOS1) Red ( MOS2 ) 10 Primary Monitoring Source: SNR E0102 Properties: Have standard source spectral model Known to be stable ( EPIC -pn) Regularly observed throughout mission contamination model (VARABS) normalized counts s-1 keV-1 6 8 Multiply standard source model by Contaminant: Carbon dominated (c.f. RGS) 2 4 0.2 0.5 Energy (keV) 1 2 Derive predicted ... XMM EPIC MOS Steve Sembay (sfs5@le.ac.uk) ESAC 09/04/2015 ...

... A total of 19 standard observing bands are defined at the VLA. ... The tables below describe the bands. ... VLA STANDARD BANDS - VLA SYNTHESIZER SETTINGS VLABAND VLAFEAB VLAFECD VLASYNA VLASYNB FLUKEA FLUKEB FEFILT CC 0.00 0.00 3860.1 3810.1 100.00000 200.00000 0000 UU 19.60 19.60 3610.1 3660.1 100.00000 200.00000 0000 KK 17.60 17.60 3860.1 3810.1 100.00000 200.00000 0000 LL - 3.20 - 3.20 3639.9 3560.1 100.00000 200.00000 0000 XX 13.40 13.40 3939.9 3889.9 ...

Instrument Summary -- Why Use the GHRS? Here we provide a brief overview of the basic properties of the GHRS. ... The GHRS can obtain spectra from about 1150 to 3200 . ... The repeatability of fluxes is even better, being better than 1%; i.e., it is possible to compare measures of the same wavelength in the same star at different times to within 1% for observations with the LSA. ... The source to be observed may be placed in a Large Science Aperture (LSA) or a Small Science Aperture (SSA). ...

... 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. ...

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. ...

... 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. ...

... The first step to improve the FORS calibration is therefore to obtain data to allow a computation of the illumination correction across the field. ... Another limitation on the calibration accuracy has been the brightness of the Landolt standards which have forced the use of extremely short exposures introducing small but non-negligible shutter-time errors and also resulting in a very small number of useful standards per frame. ...

Emission Line -- Continuum Correlations in Low­Redshift Quasars Belinda Wilkes , Smita Mathur, Jonathan McDowell (SAO) and Ari Laor (Caltech) We investigate the relation between the observed optical emission line strengths, widths and ratios and the observed continuum properties for two samples of quasars: 43 Einstein observed quasars for which we have obtained IR--soft­X­ 1994). ... 1) Contrary to PG sample and Shastri et al. ...

... The standard lbn cal diode was compared to the standard diode. Using the standard diode value and the insertion loss the lbn cal value was computed every 25 MHz from 1200 MHz to 1600 Mhz. ... After the measurement, the insertion loss from the standard diode to the output of the coupler was measured over the frequency range 1200 to 1400 Mhz. ... The major uncertainty in the measurement is in the standard diode ENR and the insertion loss of the waveguide transition. ... freq [Mhz] . ...

... Binary large object. ... CGI is a popular interface used to create server-based web applications with languages such as Perl or C. A web browser, such as Netscape Navigator. ... Core JavaScript contains a core set of objects, such as Array , Date , and Math , and a core set of language elements such as operators, control structures, and statements. ... A JavaScript primitive value is a member of one of the following types: undefined , null , Boolean , number , or string . ... World Wide Web . ...

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

... The nebular spectra of SNeIa can be used to determine the mass, density, and distribution of the SN ejecta, and the distance and reddening to the SN. Synthetic spectra can very rapidly be computed in NLTE and compared to the observed ones. Given the relatively large number of parameters, it is convenient to explore the parameter space in an automated form. The nebular spectrum synthesis code can be run in parallel on a workstation cluster. ...

... 237S (SIMBAD/NED BibCode) ================================================================================ Keywords: Sun: UV radiation - atmospheric effects - Sun: atmosphere - lines: identification Description: An ultraviolet atlas of the solar spectrum with a spectral resolution of 15mA in the region 1948-2000A is presented. ... The wavelength atlas with a list of about 550 lines has been synthesized from data at center of the Sun ({mu}=1) and at {mu}=0.89, smoothed out over an area of 30 arcsec. ...

... Using the self-consistent 3D hydrodynamical code in Kobayashi et al. (2007) , we simulate the star formation and chemical enrichment history of the Universe. ... We also predict the rates of supernovae and gamma-ray bursts, and the properties of the host galaxies, which will be observed with the ANU's new SkyMapper telescope. ... Supernova feedback on galaxy formation. ... Feedback from active-galactic nuclei (AGN). ... COALA : Universe Galaxy AGN Star Planet ...

... 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. ... MeadeтАЩs new LX70 Series offers high-quality German equatorially mounted telescopes with slow-motion controls and heavy-duty steel tripods. ... For crisp wide-field observing and imaging, few optical designs match the performance of a true triple-element apochromatic refractor. ... Meade Standard Field Tripod #07020. ...

... Tonight's Sky . ... т??Standard candleт?? supernova extraordinarily magnified by gravitational lensing . ... A team of researchers at the Kavli Institute for the Physics and Mathematics of the Universe (IPMU) led by Robert Quimby has identified what may prove to be the first ever type Ia supernova (SNIa) magnified by a strong gravitational lens. In this work, the standard candle property of type Ia supernovae is used to directly measure the magnification due to gravitational lensing. ...

... I studied a variable star with small light variations found on the Kepler satellite. ... I calculated the surface properties and created a hypothesis of a reflecting binary star system to be the cause of this variation in luminosity. ... I can do this by studying the atomic spectra of the star. ... I found the star to be rich in Helium. I then compared the spectrum against model spectra of Helium rich stars to work out the surface gravity, surface temperature and Helium abundance of the star. ...

... 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. ...

Last updated 5 November 2003 by JMD . Last link checked 9 October 2003 by JCB . Data from 191 observations of stars with the ARCES were analyzed to calculate exposure times to reach particular signal-to-noise values for bright standard stars. ... An exponential fit to the data shows pretty good agreement and allows for forecasting to fainter stars beyond the limit of the data set ( V ~ 12). The fit was used to calculate the exposure times in the table below: . ...