ETC Request ID: STIS.sp.1370009

Exposure time (seconds) = 2,060.0000 at wavelength 1300.00 Å

gives: SNR = 8.2018 (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 0.024 98.44 9.92
    Background 0.011 45.62 6.75
        Sky 0.010 41.30 6.43
        Dark Current 0.001 4.33 2.08
Total in selected region 0.035 144.07 12.00
Brightest Pixel (single exposure) (at 1217.70 Å) 0.016 32.59
Count rate entire detector 285.208
Buffer Time (sec) 7,012.42
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 15.061 31,025.585
    Background (sky+dark) 270.147 556,503.72
Encircled energy fraction 0.81

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength:
Grating: [G140L] R ~ 1000
Aperture: 52X0.2
Glow region: low


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 7.5e-16 flam at 1300.0 Å
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