ETC Request ID: STIS.sp.821770
Exposure time (seconds) = 900.0000 at wavelength 1218.00 Å
gives: SNR = 1.0595 (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 | 0.001 | 2.12 | 1.46 |
| Background | 0.001 | 1.89 | 1.37 |
| Sky | 2.482e-13 | 4.47e-10 | 2.11e-05 |
| Dark Current | 0.001 | 1.89 | 1.37 |
| Total in selected region | 0.002 | 4.01 | 2.00 |
| Brightest Pixel (single exposure) (at 1215.70 Å) | 0.006 | 5.14 | |
| Count rate entire detector | 176.189 | ||
| Buffer Time (sec) | 11,351.48 | ||
| 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 | 5.781 | 5,202.953 | |
| Background (sky+dark) | 170.407 | 153,366.71 | |
| Encircled energy fraction | 0.76 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1218 |
| Grating: | [G140M] R ~ 10000 |
| Aperture: | 52X0.05 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Kurucz Models A1V 9230 4.1 |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 6.85 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
