ETC Request ID: STIS.ta.1431050

Exposure time (seconds) = 0.1000

gives: SNR = 285.6482

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 32 x 32 pixels)
    Source 1,301,775.112 130,177.51 360.80
    Background 27.648 2.76 1.66
        Sky 2.317e-04 2.32e-05 4.81e-03
        Dark Current 27.648 2.76 1.66
    Read Out 278.40
Total in selected region 1,301,802.760 130,180.28 455.73
Brightest Pixel (single exposure) 342,540.468 34,254.05
Global Count Rates
    Source only 1,374,005.379 137,400.538
    Background (sky+dark) 28,311.552 2,831.16
Background per unit area
    Sky Background (arcsec-2) 0.015 0.002
    Dark Current (arcsec-2) 10.800 1.080
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 6.00
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.25
Effective Wavelength 5148.62 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.3X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models O9V 33000 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.36 applied before normalization
Normalization: Renormalized to vegamag = 2.56 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 28.1