• AAVSO
  • Dr. Bob Zavala (U.S. Naval Observatory, Flagstaff) has requested AAVSO assistance in obtaining multicolor photometry of the bright triple system b Per in order to prepare for and detect a possible eclipse of the AB components by the C component predicted for 2013 January 23. (aavso.org)
  • Dr. Péter Ábrahám (Konkoly Observatory, Budapest, Hungary) has requested the assistance of AAVSO observers in monitoring eight young stars in Chamaeleon in support of photometry he and his colleagues will be obtaining with the VLT/ISAAC (infrared) and Herschel Space Observatory (far-infrared) during January-February 2013. (aavso.org)
  • But for the treatment of photometry, however, I believe that PixInsight does not have functions compatible with AAVSO either reference stars and compatible reports. (aavso.org)
  • Normaly, for photometry treatement compatible with AAVSO, you must use MaximDL or AIP4Win. (aavso.org)
  • wavelength
  • When photometry is performed over broad wavelength bands of radiation, where not only the amount of radiation but also its spectral distribution is measured, the term spectrophotometry is used. (wikipedia.org)
  • Historically, photometry in the near-infrared through short-wavelength ultra-violet was done with a photoelectric photometer, an instrument that measured the light intensity of a single object by directing its light onto a photosensitive cell. (wikipedia.org)
  • In modern photometry, the radiant power at each wavelength is weighted by a luminosity function that models human brightness sensitivity. (wikipedia.org)
  • Photometry attempts to account for this by weighing the measured power at each wavelength with a factor that represents how sensitive the eye is at that wavelength. (wikipedia.org)
  • Instrument
  • The Photometry Performance Plans offer a choice of preventive maintenance services for consistent instrument performance and confidence in safety. (eppendorf.com)
  • Installation Qualification (IQ) and Operational Qualification (OQ) certification services ensure your Quality Management requirements are fulfilled, providing you with qualified assurance that your Photometry Instrument is functioning correctly, in accordance with manufacturers' specifications. (eppendorf.com)
  • At its most basic, photometry is conducted by gathering light in a telescope, sometimes passing it through specialized photometric optical bandpass filters, and then capturing and recording the light energy with a photosensitive instrument. (wikipedia.org)
  • To perform relative photometry, one compares the instrument magnitude of the object to a known comparison object, and then corrects the measurements for spatial variations in the sensitivity of the instrument and the atmospheric extinction. (wikipedia.org)
  • stars
  • Photometry used to obtain stellar magnitudes in the ultraviolet, blue, and green regions of the visible spectrum by comparing observed brightnesses to those of well-observed standard stars. (yourdictionary.com)
  • When doing photometry in a very crowded field, such as a globular cluster, where the profiles of stars overlap significantly, one must use de-blending techniques, such as PSF fitting to determine the individual flux values of the overlapping sources. (wikipedia.org)
  • Stroemgren photometry of F- and G-type stars brighter than V = 9.6. (wikipedia.org)
  • flux
  • When obtaining photometry from a point source, the flux is measured by summing all the light recorded from the object and subtract the light due to the sky. (wikipedia.org)
  • tools
  • All of the basic photometry tools exist (stacking, time series analysis, control of annulus', transformation, etc.) and the algorithms have been rigorously checked and confirmed to be of the highest quality. (aavso.org)
  • There are numerous tools that can debayer RAW files and several free/open source programs to do high-quality photometry. (aavso.org)
  • absolute
  • To perform absolute photometry one must correct for differences between the effective passband through which an object is observed and the passband used to define the standard photometric system. (wikipedia.org)
  • program
  • Most of folks here use MaximDL, but price maybe a concern and that program is geared more towards CCD camera photometry. (aavso.org)
  • design
  • VPhot is primarily the work of Geir Klingenberg (coding and design) and Arne Henden (photometry) with a cast of hundreds who have made suggestions, written tutorials and tested the software. (aavso.org)