ETC Request ID: STIS.sp.1011540

Exposure time (seconds) = 2,200.0000 at wavelength 1300.00 Å

gives: SNR = 18.5421 (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 0.099 437.26 20.91
    Background 0.002 7.70 2.77
        Sky 8.390e-15 3.69e-11 6.08e-06
        Dark Current 0.002 7.70 2.77
Total in selected region 0.101 444.96 23.58
Brightest Pixel (single exposure) (at 1309.44 Å) 0.040 87.33
Count rate entire detector 3,633.196
Buffer Time (sec) 550.48
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 2,030.672 4,467,478.960
    Background (sky+dark) 262.276 577,007.43
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1425
Grating: [E140M] R ~ 45800
Aperture: 0.2X0.2
Glow region: medium


Target: [point source]
Spectrum: Pickles Models B0V 28183.8K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.14 applied after normalization
Normalization: Renormalized to vegamag = 12.69 in filter Johnson/V
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 25.2