ETC Request ID: STIS.ta.1174993

Exposure time (seconds) = 20.0000

gives: SNR = 27.8312

gives: Time to Saturation (for a single exposure) = 5,542.87 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 59.740 1,194.81 34.57
    Background 0.659 13.18 3.63
        Sky 0.434 8.68 2.95
        Dark Current 0.225 4.50 2.12
    Read Out 25.20
Total in selected region 60.400 1,207.99 42.93
Brightest Pixel (single exposure) 21.649 432.99
Global Count Rates
    Source only 119.481 2,389.617
    Background (sky+dark) 53,877.858 1,077,557.15
Background per unit area
    Sky Background (arcsec-2) 19.296 385.930
    Dark Current (arcsec-2) 10.000 200.000
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 0.18
Effective Wavelength 7428.25 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 K5V 4250 4.5
Extinction E(B-V): None
Normalization: Renormalized to abmag = 21.44 in filter Sloan/G
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1