ETC Request ID: STIS.sp.824556
Exposure time (seconds) = 5,000.0000 at wavelength 1810.00 Å
gives: SNR = 22.0663 (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 | 0.063 | 634.65 | 25.19 |
| Background | 0.011 | 105.00 | 10.25 |
| Sky | 7.370e-11 | 7.37e-07 | 8.58e-04 |
| Dark Current | 0.011 | 105.00 | 10.25 |
| Total in selected region | 0.074 | 739.65 | 28.76 |
| Brightest Pixel (single exposure) (at 2319.47 Å) | 0.065 | 326.93 | |
| Count rate entire detector | 3,966.725 | ||
| Buffer Time (sec) | 504.19 | ||
| 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 | 1,884.931 | 9,424,652.514 | |
| Background (sky+dark) | 1,572.864 | 7,864,320.20 | |
| 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: | Kurucz Models O5V 44500 5.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.25 applied before normalization |
| Normalization: | Renormalized to vegamag = 12.8 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 24.2
