Oli's Exp.Time calculator Oli's Exp.Time calculator

Imaging s/n calculator

I write this prg to match my needs; it has been checked with the results of the real telescopes, and gives really good results. However, if you want the real exposure time calculators, check ESO's page.

Telescope

Real Telescope:
Telescopes and Instruments: NTT+SuSI2, NTT+EMMI, 3.6m+EFOSC, 2.2m+WFI, VLT+FORS, 1D5+DFOSC.
Filter: U, B, V, R, I.

Use a Zero Point:
Zero Point: and gain (1. if ZP in electrons):
Use a count rate:
Count rate (e-/sec for Mag=15):
Guestimate using diameter:
Diameter (m): and total efficiency (mirr*filt*ccd):

Other Parameters:
CCD Read Out Noise (e-): and Pixel size (arcsec): (not needed for real telecopes)

Sky

Seeing (arcsec):
Sky Brightness
Compute it for Filter: U, B, V, R, I. and Age of Moon: 0, 3, 7, 10, 14,
or give a value (mag/sq.arcsec.):

Maximum Individual Exposure Time:

Exp.Time (sec):

[ ESO | ESO-LaSilla | Bugs/Comments? (mail to O.Hainaut) | Olivier Hainaut ]

Update: Sun Apr 1 18:00:01 2001