ETC Request ID: STIS.sp.1369147
Exposure time (seconds) = 999.0000 at wavelength 1783.00 Å
gives: SNR = 15.4809 (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 | 0.149 | 296.78 | 17.23 |
| Background | 0.014 | 27.97 | 5.29 |
| Sky | 7.865e-11 | 1.57e-07 | 3.96e-04 |
| Dark Current | 0.014 | 27.97 | 5.29 |
| Total in selected region | 0.163 | 324.75 | 19.17 |
| Brightest Pixel (single exposure) (at 2292.96 Å) | 0.170 | 169.63 | |
| Count rate entire detector | 8,105.623 | ||
| Buffer Time (sec) | 246.74 | ||
| 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 | 4,731.081 | 4,726,349.672 | |
| Background (sky+dark) | 2,097.152 | 2,095,054.89 | |
| 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: b2.dat |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.33 applied before normalization |
| Normalization: | Renormalized to vegamag = 10.32 in filter Johnson/V |
| 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 27.2
