ETC Request ID: STIS.ta.1364002

Requested Signal/Noise Ratio = 100.000

gives: Time = 0.2795 seconds

gives: Time to Saturation (for a single exposure) = 7.58 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 37,917.703 10,599.20 102.95
    Background 0.234 0.07 0.26
        Sky 8.890e-06 2.48e-06 1.58e-03
        Dark Current 0.234 0.07 0.26
    Read Out 25.20
Total in selected region 37,917.937 10,599.27 105.99
Brightest Pixel (single exposure) 15,826.799 4,424.09
Global Count Rates
    Source only 75,835.406 21,198.402
    Background (sky+dark) 27,263.223 7,620.94
Background per unit area
    Sky Background (arcsec-2) 3.951e-04 1.104e-04
    Dark Current (arcsec-2) 10.400 2.907
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
    Fraction of flux 0.50
    Fraction of flux in brightest pixel 0.21
Effective Wavelength 6647.25 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Kurucz Models A3V 8720 4.2
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 1.16 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2