ETC Request ID: STIS.ta.912546

Exposure time (seconds) = 5.0000

gives: SNR = 130.9979

gives: Time to Saturation (for a single exposure) = 59.74 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 3,549.283 17,746.41 133.22
    Background 0.163 0.82 0.90
        Sky 0.001 5.25e-03 0.07
        Dark Current 0.162 0.81 0.90
    Read Out 24.60
Total in selected region 3,549.446 17,747.23 135.47
Brightest Pixel (single exposure) 2,008.578 10,042.89
Global Count Rates
    Source only 7,098.565 35,492.826
    Background (sky+dark) 18,941.309 94,706.54
Background per unit area
    Sky Background (arcsec-2) 0.047 0.233
    Dark Current (arcsec-2) 7.200 36.000
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: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models K0V 5250 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 8.94 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.1.1