ETC Request ID: STIS.ta.1156104

Requested Signal/Noise Ratio = 40.000

gives: Time = 3.2749 seconds

gives: Time to Saturation (for a single exposure) = 482.16 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 631.904 2,069.40 45.49
    Background 0.597 1.95 1.40
        Sky 0.435 1.42 1.19
        Dark Current 0.162 0.53 0.73
    Read Out 24.60
Total in selected region 632.501 2,071.36 51.74
Brightest Pixel (single exposure) 248.878 815.04
Global Count Rates
    Source only 1,263.808 4,138.806
    Background (sky+dark) 46,585.728 152,562.19
Background per unit area
    Sky Background (arcsec-2) 19.330 63.303
    Dark Current (arcsec-2) 7.200 23.579
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 6975.71 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 10000.0K
Extinction E(B-V): None
Normalization: Renormalized to abmag = 17.34 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