J/ApJS/182/143 SCUPOL Legacy polarimetry of SCUBA (Matthews+, 2009)
The legacy of SCUPOL: 850µm imaging polarimetry from 1997 to 2005.
Matthews B.C., McPhee C.A., Fissel L.M., Curran R.L.
<Astrophys. J. Suppl. Ser., 182, 143-204 (2009)>
=2009ApJS..182..143M 2009ApJS..182..143M
ADC_Keywords: Polarization ; Millimetric/submm sources ; Interstellar medium
Keywords: ISM: clouds - ISM: magnetic fields - polarization - submillimeter -
stars: formation
Abstract:
SCUPOL, the polarimeter for SCUBA on the James Clerk Maxwell
Telescope, was the most prolific thermal imaging polarimeter built to
date. Between 1997 and 2005, observations of 104 regions were made at
850um in the mapping mode. The instrument has produced ∼50 refereed
journal publications, and that number is still growing. We have
systematically re-reduced all imaging polarimetry made in the standard
"jiggle-map" mode from the SCUBA archive (2800+ individual
observations) to produce a catalog of SCUPOL images and tables. We
present the results of our analysis with figures and data tables
produced for all 83 regions where significant polarization was
detected. In addition, the reduced data cubes and data tables can be
accessed online. In many cases, the data included in this paper have
been previously published elsewhere. However, this publication
includes unpublished data sets, in whole or in part, toward 39
regions, including cores in Rho Ophiuchus, Orion's OMC-2 region,
several young stellar objects, and the galaxy M87.
Description:
The observations summarized in this paper span the entire operational
period of the SCUBA polarimeter, SCUPOL, which was commissioned on the
James Clerk Maxwell Telescope (JCMT) in 1997 and was used until the
retirement of the SCUBA camera in 2005 July.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
target.dat 49 104 Summary of science targets
table2.dat 88 145 Noisy bolometers
table6.dat 97 7196 SCUPOL polarization data table
table7.dat 73 666 SCUPOL planetary polarization data table
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See also:
J/A+A/453/1003 : SCUBA ultracompact HII regions (Thompson+, 2006)
J/ApJ/653/383 : SCUBA observations in Orion A South region (Johnstone+ 2006)
J/MNRAS/368/1223 : SCUBA observations of cold cores (Hill+, 2006)
Byte-by-byte Description of file: target.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- ID Source/Region designation
18 A1 --- f_ID [en*] Flag on object (1)
20- 24 A5 --- OType Object type (2)
26- 27 I2 h RAh Hour of right ascension (J2000)
29- 30 I2 min RAm Minute of right ascension (J2000)
32- 36 F5.2 s RAs Second of right ascension (J2000)
38 A1 --- DE- Sign of declination (J2000)
39- 40 I2 deg DEd Degree of declination (J2000)
42- 43 I2 arcmin DEm Arcminute of declination (J2000)
45- 49 F5.2 arcsec DEs Arcsecond of declination (J2000)
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Note (1): Flags as follows:
e = Observations are part of the project M99BC20. The data for this
project were taken during a period of dish adjustment at the JCMT.
As a consequence, the dish shape was changing each day, and it is
possible that the shape of the sidelobes was also changing. The effect
on the main beam of the antenna is not established, so these data
should be treated with caution. This is the first appearance of these
data in the literature, but they are included for completeness, and
perhaps may be useable to inform future work in the region.
* = Nondetections
n = No good data
Note (2): Objects have been categorized as follows:
BG = Bok globule
SC/PC = Starless or prestellar core
SFR = Star-forming region
YSO = Young stellar object
AGB = Post-asymptotic giant branch star
PN = Planetary nebula
SNR = Supernova remnant
GAL = External galaxy
GC = The Galactic center
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Date Date
11 A1 --- f_Date [* ] data ignored from this date (1)
13- 88 A76 --- Noisy Noisy bolometers (2)
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Note (1): An asterisk indicates data from this date does not yield a fit
to the CSO tau data; these have not been reduced or compiled with
the rest of the data.
Note (2): Parentheses indicate bolometers removed for only parts of a
night.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- ID Object/Region identification
19 A1 --- n_ID [bc] Note on ID (1)
21- 26 F6.1 arcsec RAOff Offset in Right Ascension (2)
28- 33 F6.1 arcsec DEOff Offset in Declination (2)
35- 36 I2 h RAh Hour of Right Ascension (J2000)
38- 39 I2 min RAm Minute of Right Ascension (J2000)
41- 45 F5.2 s RAs Second of Right Ascension (J2000)
47 A1 --- DE- Sign of the Declination (J2000)
48- 49 I2 deg DEd Degree of Declination (J2000)
51- 52 I2 arcmin DEm Arcminute of Declination (J2000)
54- 57 F4.1 arcsec DEs Arcsecond of Declination (J2000)
59- 67 E9.3 V Int Intensity at 850um (G1)
69- 77 E9.3 V e_Int Error in Int (G1)
79- 82 F4.1 % Pol Polarization percentage
84- 86 F3.1 % e_Pol Error in Pol
88- 92 F5.1 deg theta Polarization position angle
94- 97 F4.1 deg e_theta Error in theta
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Note (1): Flags as follows:
b = Beam (after smoothing and regridding) sampling, 20 arcsec.
c = Non-standard selection criteria used. See figure caption.
Note (2): From reference coordinates given in Table 1.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- ID Object/Region identification
9- 18 A10 "YYYY/MM/DD" Date Date of the observation
19 A1 --- MObs [ab] Multi-observation designation
21- 26 F6.1 arcsec RAOff Offset in Right Ascension (1)
28- 33 F6.1 arcsec DEOff Offset in Declination (1)
35- 43 E9.3 V Int Intensity at 850um (G1)
45- 53 E9.3 V e_Int Error in Int (G1)
55- 58 F4.1 % Pol Polarization percentage
60- 62 F3.1 % e_Pol Error in Pol
64- 68 F5.1 deg theta Polarization angle
70- 73 F4.1 deg e_theta Error in theta
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Note (1): From planetary position.
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Global Notes:
Note (G1): Raw intensities are in Volts; a flux conversion factor per night
could be applied, but would carry a comparable uncertainty which
could cumulatively exceed the uncertainty of uncalibrated flux.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-Jan-2010