ETC Request ID: STIS.ta.1370816

Exposure time (seconds) = 1.0000

gives: SNR = 296.5283

gives: Time to Saturation (for a single exposure) = 4.32 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 135,006.038 135,006.04 367.43
    Background 28.422 28.42 5.33
        Sky 1.798 1.80 1.34
        Dark Current 26.624 26.62 5.16
    Read Out 268.80
Total in selected region 135,034.460 135,034.46 455.29
Brightest Pixel (single exposure) 27,751.353 27,751.35
Global Count Rates
    Source only 146,905.975 146,905.975
    Background (sky+dark) 27,320.515 27,320.52
Background per unit area
    Sky Background (arcsec-2) 33.053 33.053
    Dark Current (arcsec-2) 10.400 10.400
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 21.76
    Fraction of flux 0.92
    Fraction of flux in brightest pixel 0.19
Effective Wavelength 7197.08 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 52X0.05
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Kurucz Models M2V 3500 4.6
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 8.251 in filter Johnson/K
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 27.2