ETC Request ID: STIS.ta.1301955

Exposure time (seconds) = 1.0000

gives: SNR = 132.0771

gives: Time to Saturation (for a single exposure) = 19.93 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 18,058.027 18,058.03 134.38
    Background 0.227 0.23 0.48
        Sky 0.002 1.56e-03 0.04
        Dark Current 0.225 0.23 0.47
    Read Out 25.20
Total in selected region 18,058.254 18,058.25 136.72
Brightest Pixel (single exposure) 6,019.862 6,019.86
Global Count Rates
    Source only 36,116.054 36,116.054
    Background (sky+dark) 26,257.865 26,257.86
Background per unit area
    Sky Background (arcsec-2) 0.070 0.070
    Dark Current (arcsec-2) 10.000 10.000
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 0.17
Effective Wavelength 7805.94 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra M1 V
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.44 in filter Johnson/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 26.2