ETC Request ID: STIS.sp.1036560
Exposure time (seconds) = 1,000.0000 at wavelength 1928.00 Å
gives: SNR = 47.3700 (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 | 1.132 | 2,264.72 | 47.59 |
| Background | 0.011 | 21.00 | 4.58 |
| Sky | 3.241e-08 | 6.48e-05 | 8.05e-03 |
| Dark Current | 0.011 | 21.00 | 4.58 |
| Total in selected region | 1.143 | 2,285.72 | 47.81 |
| Brightest Pixel (single exposure) (at 2894.40 Å) | 1.293 | 1,292.67 | |
| Count rate entire detector | 3,474.288 | ||
| Buffer Time (sec) | 575.66 | ||
| 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 | 1,899.681 | 1,899,681.477 | |
| Background (sky+dark) | 1,574.606 | 1,574,606.42 | |
| 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: | Non-stellar Objects QSO (FOS based) [100, 3387 Å z=0] |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.015 applied before normalization |
| Normalization: | Flux 2.8e-14 flam at 1928.0 Å |
| Redshift: | z=0.0353 |
| 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
