ETC Request ID: STIS.ta.1302385

Exposure time (seconds) = 4.0000

gives: SNR = 94.5809

gives: Time to Saturation (for a single exposure) = 76.33 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 7,576.078 30,304.31 174.08
    Background 25.601 102.41 10.12
        Sky 0.001 5.64e-03 0.08
        Dark Current 25.600 102.40 10.12
    Read Out 268.80
Total in selected region 7,601.679 30,406.72 320.41
Brightest Pixel (single exposure) 1,572.073 6,288.29
Global Count Rates
    Source only 8,225.744 32,902.977
    Background (sky+dark) 26,214.401 104,857.61
Background per unit area
    Sky Background (arcsec-2) 0.141 0.564
    Dark Current (arcsec-2) 10.000 40.000
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 4.00
    Fraction of flux 0.92
    Fraction of flux in brightest pixel 0.19
Effective Wavelength 7135.75 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Pickles Models M4V 3111.72K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.17 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2