ETC Request ID: STIS.sp.1156123
Exposure time (seconds) = 3,000.0000 at wavelength 2000.00 Å
gives: SNR = 25.7473 (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 | 0.130 | 780.38 | 27.94 |
| Background | 0.011 | 63.00 | 7.94 |
| Sky | 5.107e-10 | 3.06e-06 | 1.75e-03 |
| Dark Current | 0.011 | 63.00 | 7.94 |
| Total in selected region | 0.141 | 843.38 | 30.31 |
| Brightest Pixel (single exposure) (at 2319.00 Å) | 0.128 | 382.52 | |
| Count rate entire detector | 5,236.118 | ||
| Buffer Time (sec) | 381.96 | ||
| 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 | 2,884.454 | 8,653,360.811 | |
| Background (sky+dark) | 1,572.864 | 4,718,592.12 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Flat in units of Fλ |
| Extinction E(B-V): | None |
| Normalization: | Flux 3.3e-13 flam at 1900.0 Å |
| 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 25.2
