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(*)CameraIDBand(*)ReqWaveMin(*)ReqWaveMax(*)WaveMinWaveMaxRepetitions(*)ActualRepCapacitanceOutOfBandChannel
micrometermicrometermicrometermicrometerpF
CII 157.74red103R1156.950158.530156.567159.074360.14Noprime
-blue3B3A--52.19553.0723--Yes, partlyparallel
OI 63.18blue2B3A62.86063.50062.76263.632480.14Noprime
-red102R1--188.256190.880480.14Noparallel
(*) = 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.