CARMA STING Data Reduction Progress

This page provides the latest information on the reduction of the CARMA Survey Toward IR-Bright Nearby Galaxies (STING).

Go to the main STING web site.

Galaxies observed to date:

  1. NGC 337
  2. NGC 772
  3. NGC 1156
  4. NGC 1569
  5. NGC 1637
  6. NGC 2681
  7. NGC 2782
  8. NGC 3147
  9. NGC 3198
  10. NGC 3486
  11. NGC 3593
  12. NGC 3949
  13. NGC 4151
  14. NGC 4254
  15. NGC 4536
  16. NGC 5371
  17. NGC 5713
  18. NGC 6951

Data reduction procedure

The STING pipeline reduction script is ccalib.csh, which performs calibration and mapping of a single trial (track) using the MIRIAD package.  It can be downloaded here: If several trials were taken in succession, they can be given as a comma-separated list under the file parameter, and they will be merged.

Parameters are given at the top of the script, but can be also given on the command line.  The latter is strongly recommended: put the script somewhere in your path, and drive it using another script, such as that given below.  That way, upgrading the basic script should be relatively painless.  Use device=/null to execute a fully non-interactive reduction.

For standard STING processing, we use 10 km/s channels (delv=10) and apply Hanning smoothing before calibrating the data (hanning=y).  If you are making an overlay with cgdisp, the point19.olay file, showing the 10m pointing centers, may be useful.

Once the individual tracks are reduced, they are imaged together using the ccombine.csh script in a separate directory.

The pipeline script is general enough to be applied to most CARMA observations, including those in the "hybrid" correlator mode, subject to the following caveats:

  1. Channel maps are made in velocity space, and only one rest frequency is supported.  Continuum or multi-line observations are thus not imaged properly, though the script will calibrate them properly.
  2. The noise source is not used in passband calibration.  Thus, it is assumed that the astronomical passband is adequate.
  3. Only one spectral window is used in gain calibration.  In principle, once all channel-based gains are accounted for, all windows can be merged into a "superwideband" channel.  This capability will be implemented once the full CARMA correlator is available.

Questions and bug reports should be directed to the author, Tony Wong (wongt -at- illinois.edu).  If you publish data reduced using this script, an acknowledgment would be appreciated.

 

Season 1 Galaxies (Jan-Jun 2008; c0104)

Data reduction scripts

NGC 1156

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08APR23 c0104.1C_115NGC1156.2 8.2 0.068 B-; no det.
D 08MAR18 c0104.1D_115NGC1156.1 2.5 0.115 B-; no det.
D 08MAR28 c0104.1D_115NGC1156.2 3.8 0.127 B-; no det.
D 08JUN22 c0104.1D_115NGC1156.5 8.7 0.097 B-; no det.
D 08JUL10 c0104.1D_115NGC1156.[6-7] 6.4 0.057 A-; no det.
D 08JUL12 c0104.1D_115NGC1156.8 4.0 0.108 B+; no det.
D 08JUL13 c0104.1D_115NGC1156.9 4.4 0.115 B+; no det.
C+D all --- --- 0.030 no det.

NGC 2681

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08MAY13 c0104.3C_115NGC2681.[1-2] 8.9 0.043 B-; central blob
PDF figures: CO intensity;  Peak velocity

NGC 2782

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08MAY19 c0104.4C_115NGC2782.[4-5] 8.3 0.025 B-; no det.
C 08MAY31 c0104.4C_115NGC2782.6 4.2 0.079 F; poor quality
C 08JUN01 c0104.4C_115NGC2782.7 4.2 0.050 D; no det.
C 08JUN03 c0104.4C_115NGC2782.9 6.0 0.039 C; 9 ants; no det.
C all --- --- 0.020 central blob
PDF figures: CO intensity;  Peak velocity

NGC 3147

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08APR05 c0104.5C_115NGC3147.[1-2] 5.0 0.040 A-; weak det.; vcen=2820
C 08APR07 c0104.5C_115NGC3147.3 3.8 0.041 A; weak det.; vcen=2820
D 08MAR09 c0104.5D_115NGC3147.[1-2] 9.2 0.048 A; nice; vcen=2820
D 08MAR19 c0104.5D_115NGC3147.3 4.9 0.080 A-; good; vcen=2770
D 08MAR26 c0104.5D_115NGC3147.4 2.5 0.191 B-; not used
E 09JUL12 c0395.11E_115NGC314.1 7.0 0.079 C; OK; vcen=2770
D+E 3/9+3/19+7/12 --- --- 0.030 nice; varying noise
PDF figures: CO intensity;  Peak velocity;  Gaussian fit velocity

NGC 3486

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08MAY07 c0104I.9C_115NGC3486.1 4.9 0.171 B-; no det.
C 08MAY15 c0104I.9C_115NGC3486.2 5.7 0.150 B-; no det.
C 08MAY21 c0104I.9C_115NGC3486.3 3.9 0.170 C; no det.
C 08MAY23 c0104I.9C_115NGC3486.[4-5] 5.1 0.174 B-; no det.
C 08MAY25 c0104I.9C_115NGC3486.6 5.1 0.227 B-; no det.
C all --- --- 0.083 no det.

NGC 4151

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08APR26 c0104.6C_115NGC4151.1 6.1 0.074 A-; no det.
C 08APR28 c0104.6C_115NGC4151.2 7.2 0.045 B; no det.
D 08MAR01 c0104.6D_115NGC4151.2 8.0 0.051 B+; marginal
D 08MAR02 c0104.6D_115NGC4151.3 7.2 0.049 B+; marginal
C+D all --- --- 0.026 blob S of center
PDF figures: CO intensity;  Peak velocity

NGC 4254

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 08JUN08 c0104I.8D_115NGC4254.2 6.4 0.024 B; Good det.
D 08JUN09 c0104I.8D_115NGC4254.4 4.1 0.040 A; Good det.
E 09JUL02 c0297.2E_115NGC425.4 5.4 0.094 C; high noise
E 09JUL05 c0297.2E_115NGC425.5 4.9 0.045 A-; good
E 09JUL19 c0297.2E_115NGC425.9 1.7 0.146 B; short track
D+E all --- --- 0.026 nice
PDF figures: CO intensity;  Peak velocity

NGC 6951

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 08APR15 c0104.10C_115NGC6951.[1-3] 10.5 0.040 B-; central ring
C 08APR17 c0104.10C_115NGC6951.4 5.5 0.059 A; central ring
D 08JUL02 c0104.10D_115NGC6951.1 5.2 0.073 A; ring + dustlane
D 08JUL07 c0104.10D_115NGC6951.2 4.1 0.128 B; central ring
D 08JUL12 c0104.10D_115NGC6951.4 5.9 0.100 B+; ring + disk(?)
D 08JUL14 c0104.10D_115NGC6951.5 5.9 0.095 B; ring + disk(?)
D 08JUL15 c0104.10D_115NGC6951.7 4.6 0.152 B-; no det.
E 09JUL20 c0395.10E_115NGC695.1 5.7 0.070 B; good
C+D all --- --- 0.037 nice
PDF figures: CO intensity;  Peak velocity

 

Season 2 Galaxies (Jul-Dec 2008; c0192)

NGC 337

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 08JUL21 c0192.1D_115NGC337.1 5.9 0.096 B-; no det.
D 08JUL30 c0192.1D_115NGC337.2 6.9 0.049 B+; off-ctr blob
D 08JUL31 c0192.1D_115NGC337.4 5.1 0.044 B+; off-ctr blob
D 08AUG08 c0192.1D_115NGC337.5 3.1 0.070 B; no det.
D 08SEP07 c0192.1D_115NGC337.6 4.4 0.063 A-; marginal
C 08OCT24 c0192.1C_115NGC337.1 4.1 0.041 A; no det.
C 08OCT26 c0192.1C_115NGC337.2 3.8 0.044 A; no det.
C 09MAY10 c0297I.3C_115NGC337.1 5.7 0.043 B+; no det.
C 09MAY12 c0297I.3C_115NGC337.2 2.5 0.054 A-; no det.
C 09MAY18 c0297I.3C_115NGC337.3 4.3 0.063 B-; no det.
C 09MAY23 c0297I.3C_115NGC337.4 3.9 0.079 B-; no det.
C+D all --- --- 0.017 peak SE of center
PDF figures: CO intensity;  Gaussian fit velocity

NGC 3949

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 08AUG16 c0192I.6D_115NGC394.3 4.6 0.113 B-; poor data; no det.
D 08AUG19 c0192I.6D_115NGC394.4 4.9 0.090 B+; marginal
E 08OCT03 c0192I.6E_115NGC394.[2-3] 6.2 0.075 good detection
C 08NOV06 c0192I.6C_115NGC394.1 6.3 0.034 B-; no det.
C 08NOV08 c0192I.6C_115NGC394.2 4.1 0.047 B+; no det.
C 09OCT12 c0395V.5C_115NGC394.1 7.2 0.053 B; no det.
C 09OCT17 c0395V.5C_115NGC394.3 4.1 0.055 B-; no det.
D+E 8/19+10/3 --- --- 0.056 good detection
PDF figures: CO intensity;  Peak velocity

NGC 4536

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 08JUL25 c0192B.5D_115NGC453.4 4.0 0.049 A-; compact disk
D 08JUL29 c0192B.5D_115NGC453.5 4.1 0.045 D; poor phases
D 08AUG02 c0192B.5D_115NGC453.6 3.7 0.061 B; compact disk
C 09APR24 c0297.4C_115NGC453.1 4.9 0.057 B-; detected
C 09APR26 c0297.4C_115NGC453.2 3.7 0.044 A-; detected
E 09JUL19 c0395.9E_115NGC453.1 6.1 0.080 B; good
C+D all --- --- 0.024 good det.
PDF figures: CO intensity;  Peak velocity;  Gaussian fit velocity

 

Season 3 Galaxies (Jan-Jun 2009; c0297)

NGC 772

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 09FEB22 c0297B.7D_115NGC772.1 7.4 0.048 B+; v=2422; good det.
D 09FEB23 c0297B.7D_115NGC772.2 4.8 0.059 C-; v=2422; good det.
D 09FEB27 c0297B.7D_115NGC772.5 7.1 0.042 A-; v=2422; excellent
D 09MAR01 c0297B.7D_115NGC772.7 4.1 0.060 B+; v=2522; ok det.
C 09APR13 c0297B.7C_115NGC772.[1-2] 8.1 0.039 C-; v=2350; weak det.
C 09APR21 c0297B.7C_115NGC772.3 5.6 0.037 C-; v=2350; weak det.
C 09APR25 c0297B.7C_115NGC772.4 8.1 0.030 D; v=2350; weak det.
C 09APR27 c0297B.7C_115NGC772.5 8.9 0.030 B; v=2350; weak det.
C 09MAY03 c0297B.7C_115NGC772.6 3.8 0.071 F; v=2350; no det.
C 09MAY05 c0297B.7C_115NGC772.7 4.3 0.058 F; v=2350; weak det.
C 09MAY07 c0297B.7C_115NGC772.[8-9] 4.0 0.047 D; v=2350; no det.
E 09JUL21 c0395.12E_115NGC772.1 6.1 0.141 B; only 6 ants; v=2350
D all --- --- 0.016-0.043 uneven noise
PDF figures: CO intensity;  Gaussian fit velocity

NGC 3198

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 09APR13 c0297V.5C_115NGC319.1 7.8 0.036 A-; central blob.
D 09AUG23 c0395I.5D_115NGC319.1 3.2 0.157 C-; don't use
D 09AUG24 c0395I.5D_115NGC319.3 4.0 0.065 C+; central blob.
D 09AUG29 c0395I.5D_115NGC319.4 4.0 0.050 A; central blob.
D 09AUG31 c0395I.5D_115NGC319.5 3.8 0.055 A-; central blob.
C+D all - 8/23 --- --- 0.025 hint of disk emission
PDF figures: CO intensity;  CO peak velocity

NGC 5371

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 09MAY11 c0297.8C_115NGC537.1 5.3 0.048 C; no det.
C 09MAY12 c0297.8C_115NGC537.2 2.4 0.039 B+; no det.
C 09MAY13 c0297.8C_115NGC537.3 3.8 0.055 B+; no det.
C 09MAY14 c0297.8C_115NGC537.4 2.7 0.059 A; no det.
C 09MAY18 c0297.8C_115NGC537.5 4.1 0.040 B-; no det.
C all --- --- 0.021 5-sigma blob at 13:55:38.06, 40:27:28
PDF figures: CO intensity

NGC 5713

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 09MAY14 c0297.6C_115NGC571.1 5.1 0.042 A-; some emission
C 09MAY30 c0297.6C_115NGC571.2 3.9 N/A D; not useable
C 09JUN03 c0297.6C_115NGC571.3 5.4 0.056 B-; some emission
E 09JUN13 c0297.6E_115NGC571.1 5.4 0.055 B-; good detection
E 09JUN23 c0297.6E_115NGC571.3 4.7 0.042 A; good detection
C+E all - 5/30 --- --- 0.024 two peaks + disk
PDF figures: CO intensity;  CO peak velocity

 

Season 4 Galaxies (Jul-Dec 2009; c0395)

NGC 1569

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 09AUG14 c0395B.3D_115NGC156.2 3.9 0.050 B+; no det.
D 09AUG15 c0395B.3D_115NGC156.3 3.9 0.040 A; weak emission
D 09AUG19 c0395B.3D_115NGC156.4 6.9 0.047 A; weak emission
D 09AUG24 c0395B.3D_115NGC156.5 5.0 0.065 B+; marginal
D all --- --- 0.025 linear feature in NW
PDF figures: CO intensity;  CO peak velocity

NGC 1637

Array Date Files Length (hr) RMS (Jy/bm) Comments
D 09AUG03 c0395.6D_115NGC163.1 1.9 0.066 B; central blob
D 09AUG07 c0395.6D_115NGC163.2 4.5 0.048 C; spiral arms seen
D 09AUG18 c0395.6D_115NGC163.3 4.8 0.038 A; spiral arms seen
D 09AUG20 c0395.6D_115NGC163.4 5.7 0.042 A; good
D 09AUG25 c0395.6D_115NGC163.5 5.3 0.048 A-; OK
C 09OCT18 c0395.6C_115NGC163.1 4.4 0.023 B+; fluxcal suspect
D all --- --- 0.021 nice spiral structure
PDF figures: CO intensity;  CO peak velocity

NGC 3593

Array Date Files Length (hr) RMS (Jy/bm) Comments
C 09OCT11 c0395.2C_115NGC359.1 4.7 0.069 B-; weak detection
C 09OCT15 c0395.2C_115NGC359.2 1.7 0.147 B; marginal
C 09OCT16 c0395.2C_115NGC359.3 3.1 0.067 B+; weak detection

 

Tony Wong, 25 Oct 2009