ETC Request ID: STIS.sp.1038663
Exposure time (seconds) = 5,323.0000 at wavelength 2026.00 Å
gives: SNR = 31.1075 (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 | 0.108 | 1,149.81 | 33.91 |
| Background | 0.011 | 111.78 | 10.57 |
| Sky | 6.462e-10 | 6.88e-06 | 2.62e-03 |
| Dark Current | 0.011 | 111.78 | 10.57 |
| Total in selected region | 0.119 | 1,261.60 | 36.96 |
| Brightest Pixel (single exposure) (at 2373.53 Å) | 0.152 | 811.18 | |
| Count rate entire detector | 6,094.183 | ||
| Buffer Time (sec) | 328.18 | ||
| 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 | 3,560.093 | 18,950,375.923 | |
| Background (sky+dark) | 1,572.865 | 8,372,361.37 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 6X0.2 |
| Target: [point source] | |
| Spectrum: | Kurucz Models O9V 33000. 4.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 1.08 applied before normalization |
| Normalization: | Renormalized to vegamag = 7.5 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 25.2
