[ ESO ] La Silla

La Silla - Science Operation Department


SciOp

CES spectral format


The spectral format

As only part of a single Echelle order is recorded at a given time on the CCD the spectral bandwidth of the CES is quite limited. It ranges from 22.9 Å in the far blue to 67.7 Å in the far red region of the wavelength regime observable with the CES. The table lists the spectral bandwidth (fifth column) at the blaze wavelengths (third column) for each order (first column). Also listed are the limiting wavelengths for each order (second and fourth column labelled "Min" and "Max"). At the limiting wavelengths the instrumental efficiency drops down to 50% with respect to blaze maximum.

The CES spectral format
Order Wavelength Spectrum Order Wavelength Spectrum
#Min BlazeMax length (Å) #Min BlazeMax length (Å)
653459.0 3479.33512.9 22.9 643513.0 3533.73567.9 23.3
633568.0 3589.83624.9 23.6 623625.0 3647.73682.9 24.1
613683.0 3707.43741.9 24.4 603742.0 3769.23806.9 24.8
593807.0 3833.13871.9 25.3 583872.0 3899.23938.9 25.9
573939.0 3967.64008.9 26.2 564009.0 4038.54080.9 26.6
554081.0 4111.94154.9 27.1 544155.0 4188.04231.9 27.5
534232.0 4267.14312.9 28.1 524313.0 4349.14396.9 28.6
514397.0 4434.44483.9 29.2 504484.0 4523.14572.9 29.8
494573.0 4615.44666.9 30.4 484667.0 4711.54765.9 31.0
474766.0 4811.84867.9 31.7 464868.0 4916.44973.9 32.3
454974.0 5025.75084.9 33.1 445085.0 5139.95201.9 33.8
435202.0 5259.45324.9 34.6 425325.0 5384.65452.9 35.5
415453.0 5516.05587.9 36.2 405588.0 5653.95727.9 37.1
395728.0 5798.85875.9 38.2 385876.0 5951.46031.9 39.1
376032.0 6112.36195.9 40.3 366196.0 6282.16369.9 41.4
356370.0 6461.66557.9 42.6 346558.0 6651.66747.9 43.8
336748.0 6853.26954.9 45.1 326955.0 7067.37173.9 46.5
317174.0 7295.37407.9 48.0 307408.0 7538.57656.9 49.6
297657.0 7798.47924.9 51.3 287925.0 8076.98209.9 53.2
278210.0 8376.18517.9 55.2 268518.0 8698.28849.9 57.3
258850.0 9046.29208.9 59.5 249209.0 9423.19596.9 62.0
239597.0 9832.810019.9 64.7 2210020.0 10279.7--- 67.7

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