ETC Request ID: STIS.ta.1174995

Exposure time (seconds) = 10.0000

gives: SNR = 86.5966

gives: Time to Saturation (for a single exposure) = 385.33 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 809.347 8,093.47 89.96
    Background 0.659 6.59 2.57
        Sky 0.434 4.34 2.08
        Dark Current 0.225 2.25 1.50
    Read Out 25.20
Total in selected region 810.006 8,100.06 93.46
Brightest Pixel (single exposure) 311.421 3,114.21
Global Count Rates
    Source only 1,618.694 16,186.939
    Background (sky+dark) 53,877.858 538,778.58
Background per unit area
    Sky Background (arcsec-2) 19.296 192.965
    Dark Current (arcsec-2) 10.000 100.000
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 0.19
Effective Wavelength 7101.52 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: Castelli-Kurucz Models F5V 6500 4.0
Extinction E(B-V): None
Normalization: Renormalized to abmag = 18.55 in filter Sloan/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 26.1