Next: Cosmological Molecular Clouds Up: HST and the Previous: Cepheids in NGC . ... Recent calibrations of stellar surface brightness derived by modern observational interferometry show that the Cepheid PLC relations turn out to be much less affected by abundance effects than PL ones. Extragalactic Cepheid distances revisited by a calibrated PLC (V, V-Ic) relation indicate some significant systematic shifts affecting current PL determinations achieved by ground-based and HST photometry. ...

Compilation of Surface Brightness . HyperLeda home | Documentation | Search by name | ... Search an object in the surface brightness catalogue . The surface brightness in magnitudes per square arcsec (mag arcsec -2 ) . ... Surface brightness at effective radius . ... Effective mean surface brightness within the effective radius (equivalent radius in which half the total flux is emitted). ... Quality Flag The quality flag has the following meaning: . ... regular measurement . ...

... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

In the PROJECT we are using the following peculiar . features of RATAN-600 . ... Brightness temperature sensitivity being equal to the antenna temperature sensitivity .. ... Receiver system .. ... Using aperture averaging effect. dual- beam and dual (multi-) frequency filtration, we demonstrated full filtration of the atmosphere noise down to the receiver noise at all scales of acoustics peaks ( Fig.1 , Fig 2 ). ... We select this frequency as the central one in our project. ... Antenna surface . ...

... Annual Meeting . ... Other Workshops, Conferences and Events . ... Galileo Teacher Training Program Workshop . ... Submit an abstract (please read guidelines below first). ... Please fill out the abstract form carefully since the program committee will be rating the proposals based only on the information you provide. ... For the conference, you may be the lead author on one poster paper, and one oral session: a ten-minute oral paper presentation or an hour-long workshop or a special interest group....

... The temper­ atures for these M dwarfs were obtained using 5 our (T eff ,V \Gamma K) relationship. ... 6 Table 1: Coefficients of polynomial fits to T eff \Gammacolour relationships a Colour c 0 c 1 c 2 c 3 rms U \ Gamma B b 1.389 --5.270\ Delta10 \Gamma5 0.1178 B \ Gamma V b 3.800 --6.127\ Delta10 \Gamma4 0.0587 U \ Gamma B c --96.70 0.07037 --1.648\ Delta10 \Gamma5 1.261\ Delta10 \Gamma9 0.1387 B \ Gamma V c --32.62 0.02535 --6.131\ Delta10 \Gamma6 4.806\ Delta10 \Gamma10 0.0556 V...

... Telescopes ћ Binoculars ћ Microscopes . Meade Ultra-High Transmission coatings (UHTC ) Group . ... Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. ... These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models. ...

... OOF software . ... Memos . ... Raw data . ... We present a Bayesian approach to calculating the coefficients that convert the outputs of ALMA 183 GHz water-vapour radiometers into estimates of path fluctuations that can be used to correct the observed interferometric visibilities. ... Please note that the files"COPYING" in each of the distribution packages have GPL listed but it is in fact LGPL which applies. ... This is the raw data from the SMA used in the analysis shown in Section 4 of the memo. ...

... The object is remarkable because of its low estimated mass and age and because it is associated with a mid-infrared source, an indication of a surrounding dusty disk. Based on the comparison of our spectrum with similar spectra of field M-dwarfs and atmospheric models, we obtain revised estimates of the spectral type, effective temperature and luminosity of the central object. ...

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

. Next: Diameters Up: Stellar parameters from calibrations Previous: Gravities Contents . Temperatures of stars are derived from their spectral type and luminosity class. Calibrations are stored in files spec_par.V, spec_par.IV, spec_par.III, spec_par.II, spec_par.I in oyster/starbase . teff_stars Compute effective temperature for all stars in startable. teff_star ( spectrum _char ) Function. Return effective temperature for star with specified spectrum. Christian Hummel 2015-04-28

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

Advisor's project abstract: . How do stars form? ... The fact that stars form in dense clusters raises the possibility that interactions between stars may govern the process of star and planet formation. ... As a project, the student will be assigned a star forming region in the Orion molecular cloud containing a cluster of young stars. ... A summer intern will also carry out diagnostics studies of the stellar activity and variability using the results from these simulations. ... Abstract: . ...

Proposal Identi cation No.: A1730 Date Received: 2003-Oct-01 15:28:43 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Galactic Total Time Requested: 32.8 Hours Proposal Title: High Brightness Temperature Phenomena in Active Stars: Testing Solar/Stellar Connection ABSTRACT: We propose a new investigation of L-band bursts in dMe are stars and active binary systems with the upgraded Arecibo Observatory. ...

Next: NICMOS Science Up: NICMOS Data Calibration and Previous: NICMOS Software at the . ... Reference File Tools . Image Analysis and Reduction . ... These include the tasks used in the STScI pipeline, tools to generate the reference files used by the calibration pipeline tasks, and general image analysis, manipulation, and arithmetic tasks. ... Calnica is used to apply instrumental calibrations to individual datasets, while calnicb is used to process associated sets of NICMOS images. ...

... This will only be implemented at a later time, if in-orbit experience warrants it. rgsoffsetcalc accepts a list of DIAGNOSTIC datasets (refer to the ODF ICD [ 1 ]. For each DIAGNOSTIC dataset rgsoffsetcalc calculates the mean and standard deviation of the pulse height distribution. ... Optionally, rgsoffsetcalc can store the pulse height distributions for each input dataset and node in a dataset (see the description of withhistogramset and histogramset ). ...

SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...

Authors: V.A. Marsakov , Yu.G. Shevelev , . Journal: 1988, Astron Zh. ... Absolute magnitudes, metallicities, effective temperatures, surface gravities, distances, and tangential velocities are calculated for 5498 F stars with homogeneous data on uvby photometry and proper motion, and placed within 80 pc from the Sun. Components of space velocities, eccentricities of galactic orbits, perigalactic and apogalactic distances, and maximal remotness from galactic plane are presented for 1787 stars. ...

To appear in "Fourth Workshop on Robotic Autonomous Observatories (2015)"RevMexAA(SC) MASSIVE PHOTOMETRY OF LOW-ALTITUDE ARTIFICIAL SATELLITES ON MINI-MEGATORTORA S. Karpov, 1, 3 E. Katkova,2 G. Beskin, 1, 3 A. Biryukov3,4 S. Bondar,2 E. Davydov5 E. Ivanov,2 A. Perkov,2 V. Sasyuk3 RESUMEN Favor de prop orcionar un resumen en espanol. ... The nine-channel Mini-MegaTORTORA (MMT-9) optical widefield monitoring system with high temporal resolution system is in operation since June 2014. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Information & tools for observers . ... Infrared and Sub-millimetre Observing Conditions on the Antarctic Plateau . ... The Antarctic plateau provides the best terrestrial sites for infrared and sub-millimetre astronomy. ... Finding a location where aerosol levels are minimised is a key constraint in determining the optimum site on the Antarctic plateau for an infrared observatory. ...