... I have compiled a list of throughput filter curves from a variety of telescopes, instruments, and surveys. Click on the name of the filter to download it. The first line of each filter is the zeropoint for that filter. If the filter is in the AB system, it is listed as 0.0 (or in otherwords -48.55). ... Filter . Effective Wavelength . ... A_V . ... 0.987 . ... 0.050 . ...

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• Instrumentation Links.
• GSAOI Component Supplier Links Page
• Brad's Data

Peremennye Zvezdy", . ... Star Name: . USNO-A2.0 0900-17250765 . ... 15.85 - 18.4 (unfiltered) ; . ... During observations of a field in Aquila, we discovered a new UV-type variable star. ... For photometry of the new variable star, we applied VaST software by Sokolovsky and Lebedev (2005). ... 5 (J2000, 2MASS)), R 1 =14 m .30, R 2 =14 m .60 (USNO-B1.0). ... Coordinates of the variable star were drawn from the 2MASS catalogue (Skrutskie et al. ... Flare of USNO-A2.0 0900-17250765 . ...

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... ALMA . ... ARC Staff at ESO . ... The European ALMA Regional Centre (ARC) provides the interface between the ALMA project and the European science community. ... Below you can read the latest Announcements from the European ARC Network.. ... The call for 1-mm Very Long Baseline Interferometry (VLBI) proposals to use phased ALMA at Band 6 in Cycle 4, in collaboration with the Event Horizon Telescope Consortium (EHTC), will be released to coincide with the ALMA Cycle 4 Call for Proposals in March 2016...

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• ESO - A number of OmegaCAM filters show vignetting in their central regions.
• ESO - Science Announcements
• ESO - Supercam Installed on APEX

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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• ASP: NASA s New Airborne Observatory Sees First Light"

... Calibration and analysis of this observation posed very interesting challenges for the authors, in particular dealing with an exciting new instrument whose on-orbit calibration was not yet well defined. ... Five mosaic positions were observed during five consecutive orbits as well as observations for dark and flat calibration. ... Darks and flats had to be created from contemporaneous reference observations and problems within the calibration process had to be resolved. ...

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• ADASS 2002 Conference Proceedings
• A Distributed System for ``Phase II'' Proposal Preparation
• A User Friendly Planning and Scheduling Tool for SOHO/LASCO-EIT

My colleagues and I have recently completed a series of observations of SN1999an. ... The telescope is located at Martin Observatory in Blacksburg, VA, and is operated by the Physics Department of Virginia Tech. Our IAU Minor Planet Center Observatory Code is 841. ... Attached you will find a copy of one of our images (in .jpg format) with the supernova indicated. ... Virginia Tech Department of Physics . Back to Bright Supernovae . Back to Supernova 1999an . ...

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