... Near Infrared Camera and Multi-Object Spectrometer Instrument Handbook for Cycle 17 > Appendix B: Flux Units andLine Lists > B.2 Formulae . B.2 Formulae . ... B.2.2 Conversion Between Fluxes and Magnitudes . ... One Jansky (Jy) is defined as 10 ?26 Wm -2 Hz -1 , so it is a unit of measurement of the spectral flux density, F ? ... The spectral flux density F ? ... We list the central wavelengths and zero-point fluxes for the more commonly encountered photometric bands below in Table B.2 . ...

... SQL | ... Tutorial: determine H0 using SQL queries to LEDA . ... We select in the database all galaxies with known velocity and magnitude and similar to a given template for which we know the distance, the magnitude and the radial velocity. ... We simply have to choose a property which does not depend on the distance, as for example the rotation velocity ( log(vrot) ) and select the galaxies having log(vrot) in a very narrow range around the value for the template galaxy. ... leda@univ-lyon1.fr ...

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. ...

... MODE = PrimePartialW2 / Instrument configuration CALIBRATION_ MODE _1 = PrimePartialW2 / Mode used to calibrate events from CCD 1 CALIBRATION_ MODE _2 = PrimeFullWindow / Mode used to calibrate events from CCD 2 CALIBRATION_ MODE _3 = PrimeFullWindow / Mode used to calibrate events from CCD 3 CALIBRATION_ MODE _4 = PrimeFullWindow / ... The DATA_MODE_n parameters indicate the data mode (determined by the oal ) the n-th CCD was in during the exposure. ...

... 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. ...

The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

... After a remarkable performance in the northern hemisphere, the brightest comet in decades is now showing off in the south. ... Comet McNaught from New STEREO Satellite . ... Shown above is a time-lapse movie in infrared light detailing how stars in the central light-year of our Galaxy have moved over the past eight years. ... Bright Comet McNaught (C/2006 P1) graced the twilight this week, seen by many and often described with superlatives. ... McNaught Now Brightest Comet in Decades . ... 2005 2006...

... На самом деле, когда я писал эту -- -- программу, мне хотелось потренироваться в проведении интервью по -- -- правилам SADT методологии. ... Логическое описание блоков SADT модели. ... Основное предназначение этих классов - хранить перечень посуды и -- -- инструментов, соответствующих различным блокам SADT модели. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . July 28th marks the 125th anniversary of the erection of the 10-inch Grubb refracting telescope at the Armagh Observatory. ... Dreyer used the telescope extensively over the next thirty years, especially while confirming some of the details of nebulae and star clusters for his venerable NGC catalogue, that is, A New General Catalogue of Nebulae and Clusters of Stars, published in 1888 by the Royal Astronomical Society. ...

... When creating a mosaic from a set of individual frames, the correct background offset for each frame must be determined for proper matching. In this paper we describe a method for constructing a mosaic from a set of individual frames by applying a minimization technique. ... Typically these are frames with some known defect (see ? ... Determining which frames to exclude from the final mosaic is critical, since one bad frame can create background offset errors that propagate throughout the mosaic. ...

... Polish scientists at the Space Research Centre, Polish Academy of Sciences, in Wroclaw, south-west Poland, have constructed an instrument called SphinX (short for Solar PHotometer In X-rays), which is an X-ray spectrophotometer, that will obtain spectra in the energy range 0.5--15 keV in 256 energy channels with frequency of up to 100 times a second. ... SphinX is part of a package of instruments known as TESIS (PI Prof. Sergei Kuzin, Lebedev Institute, Moscow). ... Space Research Centre, . ...

... Classes . ... classes that define a functional representation of the sky brightness More... class . casa::ComponentList . A class for manipulating groups of components. More... class . ... Base class for component shapes. ... Base class for model components of the sky brightness. ... A model component of the sky brightness. ... Base class for spectral models. ... Internal ComponentModels_module classes and functions. classes that define a functional representation of the sky brightness . ...

... Inst Data Fit allows one to determine various parameters needed for instrument data files, including: scale, orientation and the position of the rotator with respect to the instrument. ... Run Inst Data Fit. ... Specify all fields above the "Fit Scale and Orientation" button New Rot_Inst_ang . ... Modified the instructions so that new scale and orientation values are applied to the instrument block before measuring center-of-rotation data (to solve a problem brought to light by SPICam). ... R.O. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... Tpram - time of the PRAM instrument (aquisition computer) . ... Bx - DC magnetic field with a fixed amplitude calibration; X component . ... The color lines present FFT from the AC magnetic field (Waveform); Bwx, Bwy, Bwz - from the bottom. ...

... Tpram - time of the PRAM instrument (aquisition computer) . ... Bx - DC magnetic field with a fixed amplitude calibration; X component . ... The color lines present FFT from the AC magnetic field (Waveform); Bwx, Bwy, Bwz - from the bottom. ...

... The STECF IRAF layered package impol provides five tasks specifically aimed at reduction of HST imaging polarimetry data for ACS, FOC, NICMOS and WFPC2. ... Reduction of HST polarimetry data and simulation of raw polarimetry images, together with polarization vector plotting, are covered. ... hstpolsim -- Produce simulated polarization input data frames for HST instruments from images of the total signal, the linear polarization and the position angle of the polarization vectors. ...

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

Definitions of Magnitudes and Surface Brightness 1 The magnitude system 1.1 Apparent magnitude Astronomers are stuck with the antiquated old system of magnitudes and so a clear explanation of what this system is and how it relates to more sensible units is important. ... 1.2 Absolute magnitude Absolute magnitude is a logarithmic luminosity scale. ... One usually goes by the round about process of referring to the absolute magnitude of the sun. ... Magnitudes and surface brightness 6/6 ...

... Load the CD ROM into your reader (assumed to be mounted as /cdrom), and set the location of the disk and with eincdpar ei> eincdpar.ipcevt4="/cdrom/" Then use ecd2pros to create the QPOE file; ei> ecd2pros input FITS file name OR sequence number: 2952 Einstein instrument (hri|ipc): ipc datatype of FITS file (event|image|slew|unscreened): event root name for output files (.): i2952 Using FITS file /cdrom/data/23h/i2357s64.xpa to create QPOE file. ...