ETC Request ID: STIS.ta.1383712

Requested Signal/Noise Ratio = 100.000

gives: Time = 5.0228 seconds

gives: Time to Saturation (for a single exposure) = 142.06 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 2,110.786 10,602.13 102.97
    Background 0.666 3.35 1.83
        Sky 0.432 2.17 1.47
        Dark Current 0.234 1.18 1.08
    Read Out 25.20
Total in selected region 2,111.453 10,605.48 106.02
Brightest Pixel (single exposure) 844.741 4,243.00
Global Count Rates
    Source only 4,221.573 21,204.263
    Background (sky+dark) 54,817.750 275,340.51
Background per unit area
    Sky Background (arcsec-2) 19.221 96.542
    Dark Current (arcsec-2) 10.400 52.237
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 6886.57 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 22000.0K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.0939 applied before normalization
Normalization: Renormalized to abmag = 16.0 in filter Sloan/R
Redshift: z=0.015
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 27.2