ETC Request ID: STIS.ta.827229

Requested Signal/Noise Ratio = 40.000

gives: Time = 2.8392 seconds

gives: Time to Saturation (for a single exposure) = 421.66 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 738.709 2,097.37 45.80
    Background 0.608 1.73 1.31
        Sky 0.437 1.24 1.11
        Dark Current 0.171 0.49 0.70
    Read Out 25.50
Total in selected region 739.316 2,099.09 52.43
Brightest Pixel (single exposure) 284.593 808.03
Global Count Rates
    Source only 1,477.417 4,194.734
    Background (sky+dark) 47,758.524 135,597.67
Background per unit area
    Sky Background (arcsec-2) 19.417 55.128
    Dark Current (arcsec-2) 7.600 21.578
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 7094.92 Å

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


Target: [point source]
Spectrum: Flat in units of Fν
Extinction E(B-V): None
Normalization: Renormalized to abmag = 17.3 in filter ACS/WFC1/F555W
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2