ETC Request ID: STIS.ta.1299541

Exposure time (seconds) = 1.0000

gives: SNR = 521.0817

gives: Time to Saturation (for a single exposure) = 1.43 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 272,159.952 272,159.95 521.69
    Background 0.225 0.23 0.47
        Sky 8.928e-06 8.93e-06 2.99e-03
        Dark Current 0.225 0.23 0.47
    Read Out 25.20
Total in selected region 272,160.177 272,160.18 522.30
Brightest Pixel (single exposure) 83,935.521 83,935.52
Global Count Rates
    Source only 544,319.903 544,319.903
    Background (sky+dark) 26,214.648 26,214.65
Background per unit area
    Sky Background (arcsec-2) 3.968e-04 3.968e-04
    Dark Current (arcsec-2) 10.000 10.000
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 0.15
Effective Wavelength 8143.18 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 M2I 3600 0.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 0.4 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2