ETC Request ID: STIS.ta.1368142

Requested Signal/Noise Ratio = 100.000

gives: Time = 0.8137 seconds

gives: Time to Saturation (for a single exposure) = 25.03 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 13,026.303 10,599.31 102.95
    Background 0.236 0.19 0.44
        Sky 0.002 1.27e-03 0.04
        Dark Current 0.234 0.19 0.44
    Read Out 25.20
Total in selected region 13,026.538 10,599.51 105.99
Brightest Pixel (single exposure) 4,795.004 3,901.63
Global Count Rates
    Source only 26,052.606 21,198.628
    Background (sky+dark) 27,306.262 22,218.71
Background per unit area
    Sky Background (arcsec-2) 0.069 0.056
    Dark Current (arcsec-2) 10.400 8.462
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 7331.95 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models K5V 4250 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 8.1 in bandpass defined above.
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2