ETC Request ID: STIS.ta.825079

Requested Signal/Noise Ratio = 40.000

gives: Time = 6.9974 seconds

gives: Time to Saturation (for a single exposure) = 440.39 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 32 x 32 pixels)
    Source 1,674.958 11,720.28 108.26
    Background 21.269 148.83 12.20
        Sky 1.813 12.69 3.56
        Dark Current 19.456 136.14 11.67
    Read Out 272.00
Total in selected region 1,696.227 11,869.11 293.01
Brightest Pixel (single exposure) 272.484 1,906.67
Global Count Rates
    Source only 2,012.955 14,085.367
    Background (sky+dark) 19,980.965 139,813.99
Background per unit area
    Sky Background (arcsec-2) 33.330 233.223
    Dark Current (arcsec-2) 7.600 53.180
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 21.76
    Fraction of flux 0.83
    Fraction of flux in brightest pixel 0.14
Effective Wavelength 8638.36 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 52X0.05
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Non-stellar Objects Dwarf Gliese 406
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 18.27 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2