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BSM - Berry

Bright Star Monitor - Berry (BSM Berry)

This is the home of the Martin Bruce Berry Telescope











More photos of BSM Berry's enclosure can be found here.

AAVSO Headquarters
Latitude and longitude: 42:23:15.6N  71:08:21.5W (42.387664, -71.139297)
Elevation: 20m
Site manager: Arne Henden
Internet access: cable modem
Weather statistics: 60-100 useful nights per year
Typical good seasons: good nights scattered throughout year

Type: Astro-Tech AT72ED
Aperture: 72mm
Focal length: 432mm
F-ratio: 6
Focuser: Moonlite
Filter wheel: SBIG CFW-10
Camera: SBIG ST-8XME

Type: CGEM
Pointing accuracy: 4arcmin
Maximum unguided tracking: 30sec until polar alignment improved
Restrictions, if any: trees to north
Computer: Dell
Software: TheSky, MaxIm DL, ACP, ACP Scheduler
Telecope Advocate:

Typical seeing: better than 4arcsec
Best seeing:  unknown
Vignetting: none
Scattered light: none
Image defects: one weak column

Filters: BVRIC
Exposure ratios/filter:
Pixel count: 1530x1024
Pixel scale: 4.34arcsec/pix
Field of view: 1.84x1.25 deg
Gain: 2.5 e-/ADU
Readnoise: 14 e-
Linearity (graph)
Full well: 53K ADU
Cosmetic defects: none
Dark current: low
Read time: 5sec
Shortest exposure: 0.2sec
Compressed image size: 1MB
QE response (graph)

Images of typical darks, typical flats

Typical use of system

Miscellaneous notes

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484