ETC Request ID: STIS.sp.1367348

Exposure time (seconds) = 2,341.0000 at wavelength 1360.00 Å

gives: SNR = 68.5181 (per resolution element)

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Buffer time 48.064 is less than minimum 99 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 7 pix) (2 pix resel x 7 pix)
    Source 1.203 5,632.12 75.05
    Background 0.001 4.92 2.22
        Sky 1.196e-14 5.60e-11 7.48e-06
        Dark Current 0.001 4.92 2.22
Total in selected region 1.204 5,637.03 82.20
Brightest Pixel (single exposure) (at 1344.99 Å) 0.456 1,066.38
Count rate entire detector 41,611.213
Buffer Time (sec) 48.06
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 24,972.157 58,459,819.146
    Background (sky+dark) 157.418 368,515.92
Encircled energy fraction 0.94

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: hd55606.spec
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 27.2