ETC Request ID: STIS.ta.1183929

Requested Signal/Noise Ratio = 40.000

gives: Time = 22.1976 seconds

gives: Time to Saturation (for a single exposure) = 3,149.04 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 94.422 2,095.95 45.78
    Background 0.659 14.63 3.83
        Sky 0.434 9.64 3.10
        Dark Current 0.225 4.99 2.23
    Read Out 25.20
Total in selected region 95.082 2,110.58 52.40
Brightest Pixel (single exposure) 38.107 845.88
Global Count Rates
    Source only 188.845 4,191.891
    Background (sky+dark) 53,877.858 1,195,957.04
Background per unit area
    Sky Background (arcsec-2) 19.296 428.335
    Dark Current (arcsec-2) 10.000 221.976
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 6849.95 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 = 19.0 in filter Sloan/G
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1