ETC Request ID: STIS.ta.1013509

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0060 seconds

gives: Time to Saturation (for a single exposure) = 0.27 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.00595651 is less than the minimum exposure time for this detector (0.1)


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 1,901,524.432 11,326.45 106.43
    Background 18.433 0.11 0.33
        Sky 0.001 8.41e-06 2.90e-03
        Dark Current 18.432 0.11 0.33
    Read Out 262.40
Total in selected region 1,901,542.865 11,326.56 283.16
Brightest Pixel (single exposure) 446,503.990 2,659.61
Global Count Rates
    Source only 2,016,145.682 12,009.195
    Background (sky+dark) 18,874.369 112.43
Background per unit area
    Sky Background (arcsec-2) 0.141 8.407e-04
    Dark Current (arcsec-2) 7.200 0.043
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 4.00
    Fraction of flux 0.94
    Fraction of flux in brightest pixel 0.22
Effective Wavelength 6214.26 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.05ND
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