ETC Request ID: STIS.sp.1038672

Exposure time (seconds) = 2,714.0000 at wavelength 1215.60 Å

gives: SNR = 15.1487 (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 2 pixels high) (1 pix x 2 pix) (2 pix resel x 2 pix)
    Source 0.071 385.52 19.63
    Background 0.048 262.15 16.19
        Sky 0.047 256.72 16.02
        Dark Current 1.000e-03 5.43 2.33
Total in selected region 0.119 647.67 25.45
Brightest Pixel (single exposure) (at 1196.10 Å) 0.060 161.92
Count rate entire detector 5,769.242
Buffer Time (sec) 346.67
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 2,981.916 8,092,918.677
    Background (sky+dark) 2,787.326 7,564,803.48

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


Target: [extended source]
Source diameter (arcsec): 52.0
Spectrum: Empty
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines:
Line at Center 1215.6 Å    FWHM 0.5 Å   Flux 9.172e-13 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2