Observation Summary
| OBSID: | 1342269519 |
| Instrument: | PACS |
| AOR label: | G21.5-0.9_bkg1 |
| Proposal: | OT2_pslane_2 |
| Target: | G21.5-0.9_bkg |
| Actual RA: | 18h 33m 20.1s |
| Actual Dec.: | -10° 37' 8.69'' |
| Purpose: | offSelector |
| Concat.: | 1342269518,1342269519,1342269520,1342269521,1342269522,1342269523 |
| OD: | 1425 |
| Start: | 2013-04-07T18:23:33.000000 TAI (1744050213000000) |
| Duration: | 1519.0 seconds (incl. spacecraft on-target slew time) |
AOT and instrument configuration:
| AOT: | PacsRangeSpec |
| Mode: | Pointed, unchopped grating scan |
| Bands: | B3A R1 (prime diffraction orders selected) |
| Sampling: | High (default spectral mapping) |
| Nod cycles: | 1 |
Observation block summary
| Name(*) | Camera | ID | Band(*) | ReqWaveMin(*) | ReqWaveMax(*) | WaveMin | WaveMax | Repetitions(*) | ActualRep | Capacitance | OutOfBand | Channel |
| | | | micrometer | micrometer | micrometer | micrometer | | | pF | | |
CII 157.74 | red | 103 | R1 | 156.950 | 158.530 | 156.567 | 159.074 | 3 | 6 | 0.14 | No | prime |
- | blue | 3 | B3A | - | - | 52.195 | 53.072 | 3 | - | - | Yes, partly | parallel |
OI 63.18 | blue | 2 | B3A | 62.860 | 63.500 | 62.762 | 63.632 | 4 | 8 | 0.14 | No | prime |
- | red | 102 | R1 | - | - | 188.256 | 190.880 | 4 | 8 | 0.14 | No | parallel |
(*) = requested in HSPOT
System configuration summary
| SPG pipeline version: | SPG v14.2.2 |
| SPG pipeline products creation date: | 2017-01-17T12:47:21.742000 TAI (1863348441742000) |
| Mission configuration: | MC_H102ASTR_P70ASTR_S66ASTR_RP |
| Processed to level: | RED: 2.0 BLUE: 2.0 |
| Quality Control: | PASSED |
| Action: | NONE |
Quality comments
Off source observation in unchopped range-scan pairs; matched with the on-source observations 1342269518, 1342269520
The offset between the central spaxel and the requested sky coordinates is 1.51" 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.