ETC Request ID: STIS.ta.1362317

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.2151 seconds

gives: Time to Saturation (for a single exposure) = 183.32 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 1,717.930 2,087.39 45.69
    Background 0.667 0.81 0.90
        Sky 0.433 0.53 0.73
        Dark Current 0.234 0.28 0.53
    Read Out 25.20
Total in selected region 1,718.597 2,088.20 52.18
Brightest Pixel (single exposure) 654.580 795.35
Global Count Rates
    Source only 3,435.859 4,174.771
    Background (sky+dark) 54,873.474 66,674.50
Background per unit area
    Sky Background (arcsec-2) 19.260 23.401
    Dark Current (arcsec-2) 10.400 12.637
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 7152.98 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: Pickles Models G0I 5508.08K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 16.6 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1