ETC Request ID: STIS.sp.1438624
Exposure time (seconds) = 11,000.0000 at wavelength 1800.00 Å
gives: SNR = 18.9812 (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 | 0.028 | 610.69 | 24.71 |
| Background | 0.015 | 338.80 | 18.41 |
| Sky | 9.302e-11 | 2.05e-06 | 1.43e-03 |
| Dark Current | 0.015 | 338.80 | 18.41 |
| Total in selected region | 0.043 | 949.49 | 32.17 |
| Brightest Pixel (single exposure) (at 2267.49 Å) | 0.046 | 502.37 | |
| Count rate entire detector | 3,689.513 | ||
| Buffer Time (sec) | 542.08 | ||
| 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 | 1,088.699 | 11,975,683.897 | |
| Background (sky+dark) | 2,306.867 | 25,375,539.63 | |
| 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: AV234_STIS_E230M_c1978_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
