ETC Request ID: STIS.sp.1433944
Exposure time (seconds) = 2,215.0000 at wavelength 1200.00 Å
gives: SNR = 12.7147 (per resolution element)
Table of Source and Noise Counts per Pixel
| 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 | 0.057 | 252.51 | 15.89 |
| Background | 0.001 | 4.65 | 2.16 |
| Sky | 7.971e-14 | 3.53e-10 | 1.88e-05 |
| Dark Current | 0.001 | 4.65 | 2.16 |
| Total in selected region | 0.058 | 257.17 | 19.86 |
| Brightest Pixel (single exposure) (at 1333.43 Å) | 0.063 | 139.21 | |
| Count rate entire detector | 6,152.454 | ||
| Buffer Time (sec) | 325.07 | ||
| 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. | |||
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| Global Count Rates | |||
| Source only | 3,611.465 | 7,999,394.063 | |
| Background (sky+dark) | 157.418 | 348,681.01 | |
| Encircled energy fraction | 0.87 | ||
| 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: AV235_STIS_E140M_c1425_sed.fits |
| 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
These results were computed using: ETC version 28.1
