ETC Request ID: STIS.ta.824383

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2162 seconds

gives: Time to Saturation (for a single exposure) = 37.97 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 9,695.970 2,096.33 45.79
    Background 0.172 0.04 0.19
        Sky 0.001 2.32e-04 0.02
        Dark Current 0.171 0.04 0.19
    Read Out 25.50
Total in selected region 9,696.142 2,096.36 52.41
Brightest Pixel (single exposure) 3,160.130 683.24
Global Count Rates
    Source only 19,391.940 4,192.651
    Background (sky+dark) 19,991.367 4,322.25
Background per unit area
    Sky Background (arcsec-2) 0.048 0.010
    Dark Current (arcsec-2) 7.600 1.643
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 0.16
Effective Wavelength 7906.49 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OIII
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra B0 I
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 1.01 applied before normalization
Normalization: Renormalized to vegamag = 8.5 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2