ETC Request ID: STIS.ta.827391

Exposure time (seconds) = 2.0000

gives: SNR = 220.4842

gives: Time to Saturation (for a single exposure) = 8.61 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 24,627.699 49,255.40 221.94
    Background 0.172 0.34 0.59
        Sky 0.001 2.11e-03 0.05
        Dark Current 0.171 0.34 0.58
    Read Out 25.50
Total in selected region 24,627.871 49,255.74 223.40
Brightest Pixel (single exposure) 13,937.201 27,874.40
Global Count Rates
    Source only 49,255.398 98,510.796
    Background (sky+dark) 19,990.111 39,980.22
Background per unit area
    Sky Background (arcsec-2) 0.047 0.094
    Dark Current (arcsec-2) 7.600 15.200
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 3737.71 Å

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


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra O7 V
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 9.4 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2