{"id":1049,"date":"2014-05-28T10:00:28","date_gmt":"2014-05-28T18:00:28","guid":{"rendered":"http:\/\/jazzistentialism.com\/blog\/?p=1049"},"modified":"2015-02-11T23:36:41","modified_gmt":"2015-02-12T07:36:41","slug":"spectra-l200-neon-calibration-test","status":"publish","type":"post","link":"http:\/\/jazzistentialism.com\/blog\/?p=1049","title":{"rendered":"Spectra L200 Neon Calibration Test"},"content":{"rendered":"

Initial calibration and testing of a\u00a0Spectra L200 spectroscope<\/a> using the integrated neon calibration lamp. The analysis was undertaken using “BASS”. Click “Continue reading” below to see the entire analysis.<\/p>\n

\"NeonColour\"<\/p>\n

<\/h2>\n

<\/h2>\n

<\/h2>\n

<\/p>\n

Equipment<\/h2>\n

Telescope: DSI RC14C (0.35m, f\/7 Ritchey\u2013Chr\u00e9tien)
\nImaging Camera: Atik314L+ (1392×1040, 0.65\u00b5m)
\nSpectroscope: Spectra-L200 with 600 l\/mm diffraction grating<\/p>\n

Images<\/h2>\n

Images of the Spectra L200 integrated neon lap were taken at a variety of exposures from 1 to 5 seconds. Figure 1 shows the neon calibration lamp centred at approximately 6150 Angstroms. The exposure is 5 seconds at Bin2, with the slit adjusted to approximately 25 microns on the slit adjustment dial.<\/p>\n

\"RAWNeon\"<\/a>

Figure 1: The appearance of the RAW fits file from the Atik314L+ imaging camera.<\/p><\/div>\n

Camera angle has been [incorrectly] adjusted to present\u00a0‘vertical’ lines. The residual tilt is evident.<\/p>\n

Analysis<\/h2>\n

1.\u00a0\u00a0\u00a0 Raw profile<\/h3>\n

An active binning area covering the central portion of the image was selected:<\/p>\n

\"RawNeonCrop\"<\/a><\/p>\n

Figure 2 shows the resulting uncalibrated spectral profile as it appears in BASS (click to enlarge image).<\/p>\n

\"NeonUncalibrated\"<\/a>

Figure 2: Uncalibrated neon spectral profile.<\/p><\/div>\n

2.\u00a0\u00a0\u00a0 Calibrated profile<\/h3>\n

Figure 3 shows the result of a simple two point (linear) calibration and provides the following values:<\/p>\n