ETC Request ID: STIS.ta.1365202

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.5233 seconds

gives: Time to Saturation (for a single exposure) = 76.35 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Partial overlap between instrument throughput band and target spectrum. Please doublecheck the wavelength range covered by the selected spectrum, and the instrument documentation for the selected filter.


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 3,988.192 2,087.10 45.68
    Background 0.666 0.35 0.59
        Sky 0.432 0.23 0.48
        Dark Current 0.234 0.12 0.35
    Read Out 25.20
Total in selected region 3,988.859 2,087.45 52.18
Brightest Pixel (single exposure) 1,571.732 822.52
Global Count Rates
    Source only 7,976.385 4,174.197
    Background (sky+dark) 54,817.750 28,687.19
Background per unit area
    Sky Background (arcsec-2) 19.221 10.059
    Dark Current (arcsec-2) 10.400 5.443
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 0.20
Effective Wavelength 6971.14 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: User uploaded spectrum: daz7903_804_bin.etc
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2