Observation Summary

OBSID:1342268800
Instrument:PACS
AOR label:W51_red
Proposal:OT2_landerso_1
Target:W51
Actual RA:19h 23m 42.47s
Actual Dec.:14° 30' 46.3''
Redshift:0.0 (z)
Purpose:---
Concat.:1342268799,1342268800
OD:1417
Start:2013-03-31T05:40:37.000000 TAI (1743399637000000)
Duration:828.0 seconds (incl. spacecraft on-target slew time)

AOT and instrument configuration:

AOT:PacsLineSpec
Mode:Pointed, unchopped grating scan
Bands:B2B R1 (prime diffraction orders selected)
Is bright:NO (default range mode)
Nod cycles:1

Observation block summary

Name(*)CameraIDBand(*)Wave(*)WaveMinWaveMaxRepetitions(*)ActualRepCapacitanceOutOfBandChannel
micrometermicrometermicrometerpF
O III 3P1-3P0blue2B2B88.36087.79089.002121.15Noprime
-red102R1-175.551177.977121.15Noparallel
N II 3P2-3P1red103R1121.898120.107123.891121.15Noprime
-blue3B2B-60.05561.9651--Yes, fullyparallel
(*) = requested in HSPOT

System configuration summary

SPG pipeline version:SPG v14.2.0
SPG pipeline products creation date:2016-07-28T18:31:17.260000 TAI (1848421877260000)
Mission configuration:MC_H102ASTR_P70ASTR_S66ASTR_RP
Processed to level:RED: 2.0 BLUE: 2.0
Quality Control:PASSED
Action:NONE

Quality comments

The offset between the central spaxel and the requested sky coordinates is  1.53" 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.