ETC Request ID: STIS.sp.824735
Exposure time (seconds) = 10,000.0000 at wavelength 1810.00 Å
gives: SNR = 18.0260 (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 pix) | (2.0 pix resel x pix) | |
| Source | 0.025 | 504.91 | 22.47 |
| Background | 0.011 | 210.00 | 14.49 |
| Sky | 7.370e-11 | 1.47e-06 | 1.21e-03 |
| Dark Current | 0.011 | 210.00 | 14.49 |
| Total in selected region | 0.036 | 714.91 | 28.01 |
| Brightest Pixel (single exposure) (at 2314.85 Å) | 0.058 | 576.14 | |
| Count rate entire detector | 3,028.028 | ||
| Buffer Time (sec) | 660.50 | ||
| 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 | 1,145.801 | 11,458,014.247 | |
| Background (sky+dark) | 1,572.864 | 15,728,640.39 | |
| Encircled energy fraction | 0.92 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: sk-68155IUE_coadded.dat |
| 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 24.2
