ETC Request ID: STIS.ta.825440

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.5329 seconds

gives: Time to Saturation (for a single exposure) = 29.51 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 21,975.608 11,710.40 108.21
    Background 26.324 14.03 3.75
        Sky 6.868 3.66 1.91
        Dark Current 19.456 10.37 3.22
    Read Out 272.00
Total in selected region 22,001.932 11,724.43 292.76
Brightest Pixel (single exposure) 4,066.085 2,166.74
Global Count Rates
    Source only 24,811.154 13,221.411
    Background (sky+dark) 20,142.718 10,733.69
Background per unit area
    Sky Background (arcsec-2) 42.925 22.874
    Dark Current (arcsec-2) 7.600 4.050
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 64.00
    Fraction of flux 0.89
    Fraction of flux in brightest pixel 0.16
Effective Wavelength 7881.72 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 52X0.1
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Pickles Models M4V 3111.72K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.881 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 24.2