ETC Request ID: STIS.ta.1003498

Requested Signal/Noise Ratio = 40.000

gives: Time = 40.0061 seconds

gives: Time to Saturation (for a single exposure) = 5,703.78 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 52.071 2,083.15 45.64
    Background 0.597 23.88 4.89
        Sky 0.435 17.40 4.17
        Dark Current 0.162 6.48 2.55
    Read Out 24.60
Total in selected region 52.668 2,107.03 52.08
Brightest Pixel (single exposure) 21.039 841.67
Global Count Rates
    Source only 104.142 4,166.293
    Background (sky+dark) 46,585.728 1,863,711.04
Background per unit area
    Sky Background (arcsec-2) 19.330 773.313
    Dark Current (arcsec-2) 7.200 288.044
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 0.20
Effective Wavelength 6850.47 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: Black body at 20000.0K
Extinction E(B-V): None
Normalization: Renormalized to abmag = 20.0 in filter Sloan/R
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 25.2