ETC Request ID: STIS.ta.1006959

Requested Signal/Noise Ratio = 100.000

gives: Time = 4.4325 seconds

gives: Time to Saturation (for a single exposure) = 151.04 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 2,385.360 10,573.05 102.83
    Background 0.164 0.73 0.85
        Sky 0.002 6.95e-03 0.08
        Dark Current 0.162 0.72 0.85
    Read Out 24.60
Total in selected region 2,385.523 10,573.77 105.73
Brightest Pixel (single exposure) 794.487 3,521.54
Global Count Rates
    Source only 4,770.719 21,146.094
    Background (sky+dark) 18,917.910 83,853.16
Background per unit area
    Sky Background (arcsec-2) 0.070 0.309
    Dark Current (arcsec-2) 7.200 31.914
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 7810.00 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: Kurucz Models M2V 3500 4.6
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.91 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2