ETC Request ID: STIS.ta.1013505

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.6367 seconds

gives: Time to Saturation (for a single exposure) = 104.92 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 3,248.514 2,068.24 45.48
    Background 0.162 0.10 0.32
        Sky 8.945e-06 5.69e-06 2.39e-03
        Dark Current 0.162 0.10 0.32
    Read Out 24.60
Total in selected region 3,248.676 2,068.34 51.71
Brightest Pixel (single exposure) 1,143.709 728.17
Global Count Rates
    Source only 6,497.028 4,136.471
    Background (sky+dark) 18,874.616 12,016.93
Background per unit area
    Sky Background (arcsec-2) 3.975e-04 2.531e-04
    Dark Current (arcsec-2) 7.200 4.584
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 7553.16 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models K2V 4750 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 5.44 in filter Johnson/B
Redshift: None
Emission Lines:
Line at Center 1215.14 Å    FWHM 0.5 Å   Flux 6.3e-12 Fλ


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2