Observation Summary
| OBSID: | 1342243870 |
| Instrument: | PACS |
| AOR label: | PACS-M17-off-RED |
| Proposal: | OT1_epeeters_1 |
| Target: | M17 off |
| Actual RA: | 18h 30m 18.87s |
| Actual Dec.: | -16° 13' 1.42'' |
| Purpose: | offSelector |
| Concat.: | --- |
| OD: | 1059 |
| Start: | 2012-04-07T20:47:54.000000 TAI (1712522874000000) |
| Duration: | 669.0 seconds (incl. spacecraft on-target slew time) |
AOT and instrument configuration:
| AOT: | PacsRangeSpec |
| Mode: | Pointed, unchopped grating scan |
| Bands: | B2B R1 (prime diffraction orders selected) |
| Sampling: | Nyquist (with spectral dithering if range repetition > 1) |
| Nod cycles: | 1 |
Observation block summary
| Name(*) | Camera | ID | Band(*) | ReqWaveMin(*) | ReqWaveMax(*) | WaveMin | WaveMax | Repetitions(*) | ActualRep | Capacitance | OutOfBand | Channel |
| | | | micrometer | micrometer | micrometer | micrometer | | | pF | | |
SED B2B | red | 102 | R1 | 140.000 | 220.000 | 139.595 | 210.301 | 1 | 2 | 0.14 | No | prime |
- | blue | 2 | B2B | - | - | 69.815 | 105.196 | 1 | 2 | 0.14 | Yes, partly | parallel |
(*) = requested in HSPOT
System configuration summary
| SPG pipeline version: | SPG v14.2.0 |
| SPG pipeline products creation date: | 2016-07-27T04:14:28.186000 TAI (1848284068186000) |
| Mission configuration: | MC_H98ASTR_P69ASTR_S66ASTR_RP |
| Processed to level: | RED: 2.0 BLUE: 2.0 |
| Quality Control: | PASSED |
| Action: | NONE |
Quality comments
Off source observation in an unchopped range-scan pair; matched with the on-source observation 1342243869
The offset between the central spaxel and the requested sky coordinates is 1.77" in the dispersion direction.
If the target is point-like and is offset from the centre of a spaxel in the dispersion direction, the spectral line
profiles will develop a skew. This skewed Gaussian profile becomes more extreme as the offset increases.
Be aware that this can be confused with real velocity structure.
This will affect spectra from a single spaxel of a rebinned cube (products with filenames "..hps3dr[r|b].."),
and combined spaxel-spectra, i.e. added rebinned cube spaxels, or single spaxels from an interpolated or projected cube
(products with filenames "..hps3di[r|b].." or "..hps3dp[r|b].."). See the "PACS Handbook" for more information.