ETC Request ID: STIS.ta.1380957

Exposure time (seconds) = 0.1000

gives: SNR = 110.4869

gives: Time to Saturation (for a single exposure) = 2.88 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 128,124.224 12,812.42 113.19
    Background 0.234 0.02 0.15
        Sky 8.890e-06 8.89e-07 9.43e-04
        Dark Current 0.234 0.02 0.15
    Read Out 25.20
Total in selected region 128,124.458 12,812.45 115.96
Brightest Pixel (single exposure) 41,723.321 4,172.33
Global Count Rates
    Source only 256,248.448 25,624.845
    Background (sky+dark) 27,263.223 2,726.32
Background per unit area
    Sky Background (arcsec-2) 3.951e-04 3.951e-05
    Dark Current (arcsec-2) 10.400 1.040
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 0.16
Effective Wavelength 7910.17 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Pickles Models K5III 4008.67K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 0.86 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2