ETC Request ID: STIS.ta.1438532

Exposure time (seconds) = 10.0000

gives: SNR = 73.8636

gives: Time to Saturation (for a single exposure) = 349.25 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 607.029 6,070.29 77.91
    Background 0.244 2.44 1.56
        Sky 0.001 0.01 0.10
        Dark Current 0.243 2.43 1.56
    Read Out 26.10
Total in selected region 607.273 6,072.73 82.18
Brightest Pixel (single exposure) 343.592 3,435.92
Global Count Rates
    Source only 1,214.057 12,140.575
    Background (sky+dark) 28,377.923 283,779.23
Background per unit area
    Sky Background (arcsec-2) 0.046 0.463
    Dark Current (arcsec-2) 10.800 108.000
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 3739.41 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: User uploaded spectrum: AV234_STIS_E230M_c1978_sed.fits
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 12.0 in filter Johnson/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 28.1