ETC Request ID: STIS.sp.1003499
Exposure time (seconds) = 1,750.0000 at wavelength 1900.00 Å
gives: SNR = 10.4389 (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 | 0.039 | 137.99 | 11.75 |
| Background | 0.011 | 36.75 | 6.06 |
| Sky | 2.664e-08 | 9.32e-05 | 9.66e-03 |
| Dark Current | 0.011 | 36.75 | 6.06 |
| Total in selected region | 0.050 | 174.74 | 13.22 |
| Brightest Pixel (single exposure) (at 2398.40 Å) | 0.027 | 47.17 | |
| Count rate entire detector | 1,623.573 | ||
| Buffer Time (sec) | 1,231.85 | ||
| 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 | 48.967 | 85,691.993 | |
| Background (sky+dark) | 1,574.606 | 2,755,561.24 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | Black body at 30000.0K |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to abmag = 20.0 in filter Sloan/R |
| 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
