ETC Request ID: STIS.sp.1163846
Exposure time (seconds) = 2,000.0000 at wavelength 2000.00 Å
gives: SNR = 15.0815 (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 | 0.066 | 263.68 | 16.24 |
| Background | 0.011 | 42.00 | 6.48 |
| Sky | 5.837e-08 | 2.33e-04 | 0.02 |
| Dark Current | 0.011 | 42.00 | 6.48 |
| Total in selected region | 0.076 | 305.68 | 17.48 |
| Brightest Pixel (single exposure) (at 2611.20 Å) | 0.068 | 136.67 | |
| Count rate entire detector | 1,690.903 | ||
| Buffer Time (sec) | 1,182.80 | ||
| 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. | |||
|
|
|||
| Global Count Rates | |||
| Source only | 118.025 | 236,050.702 | |
| Background (sky+dark) | 1,572.878 | 3,145,755.55 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Flat in units of Fλ |
| Extinction E(B-V): | None |
| Normalization: | Flux 1.5e-15 flam at 5500.0 Å |
| 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 26.1
