{"id":1083,"date":"2014-05-30T15:00:17","date_gmt":"2014-05-30T23:00:17","guid":{"rendered":"http:\/\/jazzistentialism.com\/blog\/?p=1083"},"modified":"2015-02-11T23:38:27","modified_gmt":"2015-02-12T07:38:27","slug":"solar-spectra-test","status":"publish","type":"post","link":"http:\/\/jazzistentialism.com\/blog\/?p=1083","title":{"rendered":"Solar Spectra Test"},"content":{"rendered":"

Further calibration and testing of a\u00a0Spectra L200 spectroscope<\/a> on the solar spectrum (pointing the telescope at the day time sky) using the integrated neon \u00a0lamp for calibration. Click \u201cContinue reading\u201d below to see the entire analysis.<\/span><\/p>\n

\"SolarSpec_Colour\"<\/p>\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 sky were taken at overlapping micrometer intervals. Figure 1 shows a typical image of the solar (blue sky) spectrum centred at the sodium doublet at 5895 Angstroms. The exposure is 4 seconds at Bin2, with the slit adjusted to approximately 25 microns on the slit adjustment dial.<\/p>\n

\"Image1_Fits\"<\/a>

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

The camera has been [incorrectly] positioned\u00a0to present ‘vertical’ lines. The residual tilt is evident.<\/p>\n

Calibrated Profiles<\/h2>\n

Figure 2 shows a solar profile as it appears in BASS (purple line) together with the neon calibration profile (shown in blue).<\/p>\n