Observation by Joan Genebriera: Home-built spectrograph 1/2

Uploaded by

Joan Genebriera

Observer

Joan Genebriera

Observed

2015 Dec 08 - 20:00

Uploaded

2024 Feb 05 - 23:12

Objects

Equipment

Location

Tacande Observatory, La Palma

Target name

Astronomical instrumentation

Title

Home-built spectrograph 1/2

About this image

SPECTROGRAPH CHARACTERISTICS

Dispersion(mid value): 0.5 A/pixel (92 A/mm)

Spectral resolution: 1.38 A

H-alpha resolution (R): 4100

H-alpha Doppler resolution: 60 Km/sec

Diffraction grating (32mm diameter): 1800 lp/mm.

Focal factor (collimator/lens ratio): 2.14

Collimator focal ratio: 120/20 = f/6.0

To adapt the focal length of the RC telescope to the spectrograph, a 0.75X reducer is used.

Slit for general use: 26 um ( 50um at 0º tilt) 3 mm. length.

Slit for extended objects: 62 um (100um at 0º tilt) 3 mm. length

Bandwidth: 3994 – 8160 A

First order limit usage: 7988 A

Weight (including CCD, eyepiece and three reference lamps: 4.0 Kg.

Files associated with this observation

IMG_2584.jpg (186.3 kB)

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Andy Wilson, Philip Jennings

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