ETC Request ID: STIS.ta.1302381

Exposure time (seconds) = 2.0000

gives: SNR = 84.8655

gives: Time to Saturation (for a single exposure) = 102.09 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 3,894.855 7,789.71 88.26
    Background 0.227 0.45 0.67
        Sky 0.002 3.13e-03 0.06
        Dark Current 0.225 0.45 0.67
    Read Out 25.20
Total in selected region 3,895.082 7,790.16 91.79
Brightest Pixel (single exposure) 1,175.423 2,350.85
Global Count Rates
    Source only 7,789.710 15,579.421
    Background (sky+dark) 26,257.865 52,515.73
Background per unit area
    Sky Background (arcsec-2) 0.070 0.139
    Dark Current (arcsec-2) 10.000 20.000
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 0.15
Effective Wavelength 8232.67 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: 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:

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These results were computed using: ETC version 26.2