ETC Request ID: STIS.ta.203820

Exposure time (seconds) = 1.0000

gives: SNR = 261.9613

gives: Time to Saturation (for a single exposure) = 5.10 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 69,195.525 69,195.53 263.05
    Background 0.588 0.59 0.77
        Sky 0.443 0.44 0.67
        Dark Current 0.145 0.14 0.38
    Read Out 24.00
Total in selected region 69,196.113 69,196.11 264.14
Brightest Pixel (single exposure) 28,211.129 28,211.13
Global Count Rates
    Source only 138,391.050 138,391.050
    Background (sky+dark) 11,038,818.769 11,038,818.77
Background per unit area
    Sky Background (arcsec-2) 19.682 19.682
    Dark Current (arcsec-2) 6.440 6.440
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 6781.93 Å

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


Target: [point source]
Spectrum: Standard HST Star Spectra AGK+81°266 (sdO, 11.94)
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 19.2