ETC Request ID: STIS.sp.827654

Requested Signal/Noise Ratio = 25.000 at wavelength 1300.00 Å (per resolution element)

gives: Time = 1,878.0343 seconds


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 pix) (2.0 pix resel x pix)
    Source 0.210 787.01 28.05
    Background 0.001 3.94 1.99
        Sky 8.434e-15 3.17e-11 5.63e-06
        Dark Current 0.001 3.94 1.99
Total in selected region 0.211 790.96 31.48
Brightest Pixel (single exposure) (at 1308.93 Å) 0.074 139.21
Count rate entire detector 6,339.304
Buffer Time (sec) 315.49
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 3,724.025 6,993,846.500
    Background (sky+dark) 157.420 295,640.73
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: low


Target: [point source]
Spectrum: User uploaded spectrum: WD1337+705.etc
Extinction E(B-V): None
Normalization: None
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 24.2