ETC Request ID: STIS.ta.1009999

Exposure time (seconds) = 0.1000

gives: SNR = 245.7729

gives: Time to Saturation (for a single exposure) = 0.35 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 610,035.518 61,003.55 246.99
    Background 0.163 0.02 0.13
        Sky 0.001 1.05e-04 0.01
        Dark Current 0.162 0.02 0.13
    Read Out 24.60
Total in selected region 610,035.681 61,003.57 248.21
Brightest Pixel (single exposure) 345,247.900 34,524.79
Global Count Rates
    Source only 1,220,071.036 122,007.104
    Background (sky+dark) 18,941.131 1,894.11
Background per unit area
    Sky Background (arcsec-2) 0.047 0.005
    Dark Current (arcsec-2) 7.200 0.720
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 0.28
Effective Wavelength 3741.12 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra B9 V
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 4.894 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