ETC Request ID: STIS.sp.1009849
Requested Signal/Noise Ratio = 5.000 at wavelength 2850.00 Å (per resolution element)
gives: Time = 3,371.0259 seconds
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 | 0.008 | 56.39 | 7.51 |
| Background | 0.011 | 70.80 | 8.41 |
| Sky | 1.875e-06 | 0.01 | 0.11 |
| Dark Current | 0.011 | 70.79 | 8.41 |
| Total in selected region | 0.019 | 127.19 | 11.28 |
| Brightest Pixel (single exposure) (at 2796.80 Å) | 0.065 | 217.72 | |
| Count rate entire detector | 1,578.742 | ||
| Buffer Time (sec) | 1,266.83 | ||
| 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 | 4.136 | 13,942.377 | |
| Background (sky+dark) | 1,574.606 | 5,308,039.01 | |
| Encircled energy fraction | 0.87 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | Black body at 3050.0K |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 15.7 in filter Johnson/B |
| Redshift: | None |
| Emission Lines: | |
| Line at | Center 2797.2 Å FWHM 1.73 Å Flux 5e-15 Fλ |
| Line at | Center 2804.0 Å FWHM 1.73 Å Flux 3.28e-15 Fλ |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 25.2
