ETC Request ID: STIS.ta.1005928

Exposure time (seconds) = 0.1000

gives: SNR = 253.0708

gives: Time to Saturation (for a single exposure) = 0.48 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 646,444.237 64,644.42 254.25
    Background 0.597 0.06 0.24
        Sky 0.435 0.04 0.21
        Dark Current 0.162 0.02 0.13
    Read Out 24.60
Total in selected region 646,444.834 64,644.48 255.44
Brightest Pixel (single exposure) 247,609.698 24,760.97
Global Count Rates
    Source only 1,292,888.474 129,288.847
    Background (sky+dark) 46,585.728 4,658.57
Background per unit area
    Sky Background (arcsec-2) 19.330 1.933
    Dark Current (arcsec-2) 7.200 0.720
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 0.19
Effective Wavelength 7124.54 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models F8V 6250 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.05 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2