... More information on books, telescopes, clubs, etc. is available in the Getting Started section. ... For more information call 617-495-7461. Boston University Astronomy Department - Public telescopic observing is held every clear Wednesday night. ... Boston Museum of Science - For more information and admission prices call 617-723-2500. ... For information and admission prices call 508-929-2700. ... Springfield Telescope Makers , VT. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

XMM ­ Newton CCF Release Note XMM ­ CCF ­REL­26 Effective area of the X­ray telescopes P. Gondoin October 5, 2000 1 CCF components Name of CCF VALDATE List of Blocks changed CAL VERSION XSCS flag XRT1 XAREAEF 0007 2000 ­01­13T00:00:00 ONAXISXAREAEF, VIGNETTING Cal 3.80, xmm ­ sas 20000903 1900 NO XRT2 XAREAEF 0008 2000 ­01­13T00:00:00 ONAXISXAREAEF, VIGNETTING Cal 3.80, ... Report of the in­flight vignetting calibration of the MOS cameras aboard the XMM­Newton satellite. ...

... The then president of the Society, Mr. Robert Burke, appointed a committee of eight or ten members, most of whom had made smaller mirrors, as an instrument committee, with Mr. Thorpe as chairman. ... Seriously, the best practicable solution seemed to be to build a machine to do the grinding and polishing. ... It was decided to grind the edges of the mirror to make it truly circular, as the rough cast glass was some 3/8 inch longer on one diameter than on the other. ...

... We are developing and integrating software to simulate the focal plane detectors, shutters, and gratings for the Advanced X-ray Astrophysical Facility (AXAF). ... The simulations are currently being used for planning calibration activities, on-orbit performance prediction and for testing the analysis and telemetry software. ... The models, being developed as part of the AXAF Science Center, are being used to aid in calibration planning and to characterize the performance of the AXAF observatory. ...

... Energy Source: any electrical, mechanical, hydraulic, pneumatic, chemical, thermal, or other energy source that causes injury to personnel. ... Lockout Device: a device that utilizes a positive means, such as padlock or stationary- (built-in) type lock, to hold or secure an energy-isolating device in the safe position and prevent the energizing of a machine or equipment, or associated component. ... The energy-isolating devices may be operated and the machine or equipment returned to normal...

... ASRAS HOME . ... Mees Observatory . ... Site . ... Weather forecast will be correct for the Farash Center . ... Through gracious donations from Marion and Max Farash and the Louis S. Wolk Foundation, ASRAS has been able to acquire a large piece of land well away from the city lights. ... The Marian and Max Farash Center for Observational Astronomy consists of an education center, maintenance building and 6 working observatories on a 17 acre plot of land just off route 64 in the hamlet of Ionia, NY. ...

GENERAL INFORMA T ION ABOUT How does my LOMO® Night Vision Device Work? ... LOMO® NIGHT VISION DEVICES & FAQs When using a Night Vision Device, you are actually looking at an image that is projected by the intensifier tube located inside the unit (Fig. ... Light enters the Night Vision Device through the objective lens and hits the photocathode in front of the intensifier tube. ... Infrared (IR) Illuminator Microchannel Plate (Gen.2 Only) When do I use my LOMO® Night Vision Device? ... Fig. ...