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Space Telescope Imaging Spectrograph
Zodical Background and Earthshine

Zodiacal background and Earthshine intensities versus wavelength

Zodiacal contribution assumes an ecliptic latitude of 30 degrees
and an ecliptic longitude of 180 degrees, yielding a V band
surface brightness of 22.7 magnitudes per square arcsec.

Earthshine assumes an angle of 24 degrees between the target
and bright limb of the Earth. This is a relatively high
background configuration. LOW-SKY observations will have
Earthshine backgrounds lower by roughly a factor of 6.

Column 1: Wavelength (in Angstroms)
Column 2: Earthshine intensity (in erg/sec/cm^2/Angstrom/arcsec^2)
Column 3: Zodiacal intensity (in erg/sec/cm^2/Angstrom/arcsec^2)
Column 4: Total background intensity (sum of columns 2 and 3)

 1000  4.8E-23  7.3E-29  4.8E-23
 1100  8.8E-22  6.0E-27  8.8E-22
 1200  8.0E-23  6.1E-26  8.0E-23
 1400  8.6E-25  1.5E-24  2.3E-24
 1500  8.3E-25  5.3E-24  6.1E-24
 1600  5.1E-25  1.3E-22  1.3E-22
 1700  1.6E-24  4.1E-21  4.1E-21
 1800  1.9E-22  8.8E-21  8.9E-21
 1900  8.8E-22  1.3E-20  1.4E-20
 2000  2.0E-21  2.0E-20  2.2E-20
 2100  3.2E-21  7.0E-20  7.4E-20
 2200  1.5E-21  1.3E-19  1.3E-19
 2300  6.6E-22  1.0E-19  1.0E-19
 2400  5.0E-22  1.0E-19  1.0E-19
 2500  4.8E-22  1.4E-19  1.4E-19
 2600  1.1E-21  1.7E-19  1.7E-19
 2700  1.4E-20  5.8E-19  5.9E-19
 2800  4.1E-21  1.6E-19  1.7E-19
 2900  8.6E-20  1.2E-18  1.3E-18
 3000  1.9E-19  7.0E-19  8.8E-19
 3100  4.1E-19  8.5E-19  1.3E-18
 3200  7.2E-19  1.3E-18  2.0E-18
 3400  1.3E-18  1.6E-18  2.9E-18
 3500  1.6E-18  1.6E-18  3.2E-18
 3600  2.1E-18  1.8E-18  3.9E-18
 3700  2.4E-18  1.9E-18  4.3E-18
 3800  2.5E-18  1.9E-18  4.3E-18
 3900  3.0E-18  1.9E-18  5.0E-18
 4000  4.8E-18  2.8E-18  7.5E-18
 4200  4.8E-18  2.9E-18  7.7E-18
 4400  6.0E-18  2.9E-18  8.9E-18
 4600  6.8E-18  3.1E-18  1.0E-17
 4800  6.7E-18  3.4E-18  1.0E-17
 5000  6.9E-18  3.0E-18  9.9E-18
 5200  6.9E-18  2.8E-18  9.7E-18
 5400  7.1E-18  2.8E-18  9.9E-18
 5600  7.4E-18  2.7E-18  1.0E-17
 5800  7.4E-18  2.7E-18  1.0E-17
 6000  7.3E-18  2.6E-18  9.9E-18
 6200  7.0E-18  2.5E-18  9.5E-18
 6400  6.8E-18  2.5E-18  9.3E-18
 6600  6.7E-18  2.4E-18  9.1E-18
 6800  6.5E-18  2.3E-18  8.8E-18
 7000  6.3E-18  2.2E-18  8.5E-18
 7200  6.2E-18  2.2E-18  8.3E-18
 7400  5.9E-18  2.0E-18  7.9E-18
 7600  5.8E-18  1.7E-18  7.5E-18
 7800  5.6E-18  1.8E-18  7.4E-18
 8000  5.4E-18  1.7E-18  7.2E-18
 8200  5.2E-18  1.7E-18  6.9E-18
 8400  5.1E-18  1.6E-18  6.7E-18
 8600  4.9E-18  1.6E-18  6.4E-18
 8800  4.7E-18  1.5E-18  6.2E-18
 9000  4.5E-18  1.3E-18  5.9E-18
 9200  4.4E-18  1.3E-18  5.8E-18
 9400  4.3E-18  1.6E-18  5.9E-18
 9600  4.2E-18  1.3E-18  5.6E-18
 9800  4.1E-18  1.2E-18  5.3E-18
10000  3.9E-18  1.1E-18  5.0E-18
10200  3.8E-18  1.1E-18  4.8E-18
10400  3.6E-18  1.0E-18  4.7E-18
10700  3.5E-18  9.8E-19  4.4E-18
10800  3.4E-18  9.6E-19  4.4E-18
11000  3.3E-18  9.3E-19  4.2E-18