ETC Request ID: STIS.ta.1357098

Exposure time (seconds) = 1.0000

gives: SNR = 69.9942

gives: Time to Saturation (for a single exposure) = 61.88 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 5,468.693 5,468.69 73.95
    Background 0.667 0.67 0.82
        Sky 0.433 0.43 0.66
        Dark Current 0.234 0.23 0.48
    Read Out 25.20
Total in selected region 5,469.361 5,469.36 78.13
Brightest Pixel (single exposure) 1,939.149 1,939.15
Global Count Rates
    Source only 10,937.387 10,937.387
    Background (sky+dark) 54,873.474 54,873.47
Background per unit area
    Sky Background (arcsec-2) 19.260 19.260
    Dark Current (arcsec-2) 10.400 10.400
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 7519.23 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: Renormalized to vegamag = 15.7 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1