ETC Request ID: STIS.ta.1010701

Requested Signal/Noise Ratio = 100.000

gives: Time = 2.1683 seconds

gives: Time to Saturation (for a single exposure) = 73.95 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 4,876.125 10,572.71 102.82
    Background 0.164 0.35 0.60
        Sky 0.002 3.40e-03 0.06
        Dark Current 0.162 0.35 0.59
    Read Out 24.60
Total in selected region 4,876.288 10,573.07 105.73
Brightest Pixel (single exposure) 1,622.738 3,518.52
Global Count Rates
    Source only 9,752.249 21,145.429
    Background (sky+dark) 18,917.910 41,018.98
Background per unit area
    Sky Background (arcsec-2) 0.070 0.151
    Dark Current (arcsec-2) 7.200 15.611
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 7813.66 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 M2V 3548.13K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.26 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2