ETC Request ID: STIS.sp.1364507

Exposure time (seconds) = 900.0000 at wavelength 1400.00 Å

gives: SNR = 10.0672 (per resolution element)


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x 7 pix) (2 pix resel x 7 pix)
    Source 0.057 103.20 10.16
    Background 0.001 1.89 1.37
        Sky 2.452e-11 4.41e-08 2.10e-04
        Dark Current 0.001 1.89 1.37
Total in selected region 0.058 105.09 10.25
Brightest Pixel (single exposure) (at 1325.70 Å) 0.026 23.35
Count rate entire detector 1,337.477
Buffer Time (sec) 1,495.35
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 51.580 46,422.158
    Background (sky+dark) 1,285.897 1,157,307.10
Encircled energy fraction 0.82

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength:
Grating: [G140L] R ~ 1000
Aperture: 52X2
Glow region: low


Target: [point source]
Spectrum: Kurucz Models O5V 44500 5.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.769 applied before normalization
Normalization: Renormalized to abmag = 18.34 in filter Galex/NUV
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 27.2