ETC Request ID: STIS.ta.1006678

Exposure time (seconds) = 3.0000

gives: SNR = 68.2981

gives: Time to Saturation (for a single exposure) = 152.76 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 1,735.727 5,207.18 72.16
    Background 0.164 0.49 0.70
        Sky 0.002 4.70e-03 0.07
        Dark Current 0.162 0.49 0.70
    Read Out 24.60
Total in selected region 1,735.891 5,207.67 76.24
Brightest Pixel (single exposure) 785.526 2,356.58
Global Count Rates
    Source only 3,471.455 10,414.365
    Background (sky+dark) 18,917.910 56,753.73
Background per unit area
    Sky Background (arcsec-2) 0.070 0.209
    Dark Current (arcsec-2) 7.200 21.600
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 0.23
Effective Wavelength 6030.04 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 B8 V
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.17 applied before normalization
Normalization: Renormalized to vegamag = 10.36 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 25.2