ETC Request ID: STIS.ta.820948

Exposure time (seconds) = 5.0000

gives: SNR = 240.3708

gives: Time to Saturation (for a single exposure) = 18.15 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 11,684.408 58,422.04 241.71
    Background 0.172 0.86 0.93
        Sky 0.001 5.27e-03 0.07
        Dark Current 0.171 0.85 0.92
    Read Out 25.50
Total in selected region 11,684.580 58,422.90 243.05
Brightest Pixel (single exposure) 6,612.293 33,061.46
Global Count Rates
    Source only 23,368.816 116,844.080
    Background (sky+dark) 19,990.111 99,950.56
Background per unit area
    Sky Background (arcsec-2) 0.047 0.234
    Dark Current (arcsec-2) 7.600 38.000
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 3737.47 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: Castelli-Kurucz Models K0V 5250 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.65 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2