ETC Request ID: STIS.ta.1365087

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.3600 seconds

gives: Time to Saturation (for a single exposure) = 58.39 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 5,796.600 2,087.03 45.68
    Background 0.666 0.24 0.49
        Sky 0.432 0.16 0.39
        Dark Current 0.234 0.08 0.29
    Read Out 25.20
Total in selected region 5,797.266 2,087.27 52.18
Brightest Pixel (single exposure) 2,055.014 739.90
Global Count Rates
    Source only 11,593.199 4,174.061
    Background (sky+dark) 54,817.750 19,736.80
Background per unit area
    Sky Background (arcsec-2) 19.221 6.920
    Dark Current (arcsec-2) 10.400 3.744
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 0.18
Effective Wavelength 7520.16 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 2e-15 flam at 5500.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2