ETC Request ID: STIS.ta.821161

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.1590 seconds

gives: Time to Saturation (for a single exposure) = 22.66 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 13,184.556 2,096.32 45.79
    Background 0.173 0.03 0.17
        Sky 0.002 2.50e-04 0.02
        Dark Current 0.171 0.03 0.16
    Read Out 25.50
Total in selected region 13,184.729 2,096.35 52.41
Brightest Pixel (single exposure) 5,296.568 842.14
Global Count Rates
    Source only 26,369.113 4,192.639
    Background (sky+dark) 19,966.577 3,174.65
Background per unit area
    Sky Background (arcsec-2) 0.070 0.011
    Dark Current (arcsec-2) 7.600 1.208
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 0.20
Effective Wavelength 6864.95 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: User uploaded spectrum: t5250feh250.dat
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.03 applied before normalization
Normalization: Renormalized to vegamag = 8.38 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2