ETC Request ID: STIS.ta.1362319

Requested Signal/Noise Ratio = 40.000

gives: Time = 18.0688 seconds

gives: Time to Saturation (for a single exposure) = 2,843.68 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 115.910 2,094.36 45.76
    Background 0.667 12.06 3.47
        Sky 0.433 7.83 2.80
        Dark Current 0.234 4.23 2.06
    Read Out 25.20
Total in selected region 116.577 2,106.41 52.36
Brightest Pixel (single exposure) 42.199 762.48
Global Count Rates
    Source only 231.820 4,188.712
    Background (sky+dark) 54,873.474 991,500.01
Background per unit area
    Sky Background (arcsec-2) 19.260 347.998
    Dark Current (arcsec-2) 10.400 187.916
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 7396.86 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 K2I 4255.98K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 18.7 in filter Cousins/I
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1