ETC Request ID: STIS.ta.1012906

Exposure time (seconds) = 0.1000

gives: SNR = 293.8588

gives: Time to Saturation (for a single exposure) = 0.35 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 1,315,512.349 131,551.23 362.70
    Background 18.433 1.84 1.36
        Sky 0.001 1.41e-04 0.01
        Dark Current 18.432 1.84 1.36
    Read Out 262.40
Total in selected region 1,315,530.783 131,553.08 447.67
Brightest Pixel (single exposure) 345,694.335 34,569.43
Global Count Rates
    Source only 1,388,582.832 138,858.283
    Background (sky+dark) 18,874.369 1,887.44
Background per unit area
    Sky Background (arcsec-2) 0.141 0.014
    Dark Current (arcsec-2) 7.200 0.720
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 4.00
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.25
Effective Wavelength 5161.86 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra B9 V
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 4.894 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 25.2