ETC Request ID: STIS.sp.824722
Exposure time (seconds) = 5,000.0000 at wavelength 1610.00 Å
gives: SNR = 0.8112 (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 | 8.884e-04 | 8.88 | 2.98 |
| Background | 0.011 | 105.00 | 10.25 |
| Sky | 3.608e-14 | 3.61e-10 | 1.90e-05 |
| Dark Current | 0.011 | 105.00 | 10.25 |
| Total in selected region | 0.011 | 113.88 | 10.95 |
| Brightest Pixel (single exposure) (at 2319.47 Å) | 0.029 | 145.59 | |
| Count rate entire detector | 2,609.953 | ||
| Buffer Time (sec) | 766.30 | ||
| 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 | 816.606 | 4,083,027.887 | |
| Background (sky+dark) | 1,572.864 | 7,864,320.20 | |
| Encircled energy fraction | 0.91 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Kurucz Models O5V 44500 5.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.23 applied before normalization |
| Normalization: | Renormalized to vegamag = 12.73 in filter Johnson/U |
| 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
