J/ApJS/209/29 MYStIX: Mid-IR observations and catalogs (Kuhn+, 2013)
The Massive Young star-forming complex Study in Infrared and X-ray:
mid-infrared observations and catalogs.
Kuhn M.A., Povich M.S., Luhman K.L., Getman K.V., Busk H.A., Feigelson E.D.
<Astrophys. J. Suppl. Ser., 209, 29 (2013)>
=2013ApJS..209...29K 2013ApJS..209...29K
ADC_Keywords: Photometry, infrared ; H II regions ; Clusters, open
Keywords: infrared: stars, methods: data analysis, planetary systems
protoplanetary disks, stars: pre-main sequence
Abstract:
Spitzer IRAC observations and stellar photometric catalogs are
presented for the Massive Young star-forming complex Study in the
Infrared and X-ray (MYStIX). MYStIX is a multiwavelength census of
young stellar members of 20 nearby (d<4kpc), Galactic, star-forming
regions that contain at least one O star. All regions have data
available from the Spitzer Space Telescope consisting of GLIMPSE or
other published catalogs for 11 regions and results of our own
photometric analysis of archival data for the remaining 9 regions.
This paper seeks to construct deep and reliable catalogs of sources
from the Spitzer images. Mid-infrared study of these regions faces
challenges of crowding and high nebulosity. Our new catalogs typically
contain fainter sources than existing Spitzer studies, which improves
the match rate to Chandra X-ray sources that are likely to be young
stars, but increases the possibility of spurious point-source
detections, especially peaks in the nebulosity. IRAC color-color
diagrams help distinguish spurious detections of nebular polycyclic
aromatic hydrocarbon emission from the infrared excess associated with
dusty disks around young stars. The distributions of sources on the
mid-infrared color-magnitude and color-color diagrams reflect
differences between MYStIX regions, including astrophysical effects
such as stellar ages and disk evolution.
Description:
The GLIMPSE survey is a Legacy Science Program of NASA's Spitzer Space
Telescope to study star formation in the disk of the Milky Way Galaxy.
It contains six MYStIX regions - the Lagoon Nebula, the Trifid Nebula,
NGC 6334, the Eagle Nebula, M 17, and NGC 6357 - within the 2°
wide strip along the Galactic equator (GLIMPSE I and II data
releases). Furthermore, Spitzer images and photometry for RCW 38 and
NGC 3576 come from the Vela-Carina survey (Majewski et al.
2007sptz.prop40791M), using a similar observing strategy with
mosaicking and photometric analysis performed with the GLIMPSE
pipeline.
We obtained publicly available raw IRAC images from the Spitzer
Heritage Archive for nine MYStIX regions without GLIMPSE coverage.
The target list and details of the Astronomical Observation Requests
(AORs) are provided in Table 1. The camera spatial resolutions are
FWHM=1.6" to 1.9" from 3.6 to 8.0um.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 42 IRAC observing log
table2.dat 89 16120 *GLIMPSE IRAC photometry of the W3 region
table3.dat 98 767217 IRAC aperture photometry
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Note on table2.dat: The GLIMPSE pipeline was run on a deep, high dynamic range
(HDR) observation of the W 3 star-forming region (AOR 5050624). This GLIMPSE
Catalog (Archive) contains >16000 sources. These data were also reduced
using the aperture photometry method (Section 3) to compare results.
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See also:
J/ApJS/209/27 : MYStIX: the Chandra X-ray sources (Kuhn+, 2013)
J/ApJS/209/28 : MYStIX Wide-Field NIR data: crowded fields (King+, 2013)
J/ApJS/209/30 : MYStIX project: Bayesian matching (Naylor+, 2013)
J/ApJS/209/31 : The MYStIX IR-Excess Source catalog (MIRES) (Povich+, 2013)
J/ApJS/209/32 : Probable young stars in the MYStIX project (Broos+, 2013)
II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)
J/A+A/538/A142 : OB stars in NGC 6334 and NGC 6357 (Russeil+, 2012)
J/A+A/521/A61 : Stars associated to Eagle Nebula (NGC 6611) (Guarcello+ 2010)
J/A+A/515/A55 : NGC 6334-NGC 6357 complex (Russeil+, 2010)
J/ApJ/696/1278 : The extended star-forming environment of M17 (Povich+, 2009)
J/MNRAS/400/1479 : RV catalogue of O-type stars in NGC 6611 (Sana+, 2009)
J/A+A/496/453 : Phot. of candidate members of NGC6611 (Guarcello+, 2009)
J/MNRAS/407/1170 : IRAC photometry of M8 (Kumar+, 2010)
J/ApJ/643/965 : Spitzer photometry of the Trifid nebula (M20) (Rho+, 2006)
J/A+AS/134/525 : NGC 6611 compiled catalog (Belikov+ 1999)
J/A+AS/121/223 : Multiphotometry of NGC 6611 (de Winter+ 1997)
J/ApJS/69/99 : NGC 6334 centers of star formation JHK phot. (Straw+ 1989)
http://sha.ipac.caltech.edu/applications/Spitzer/SHA/ : Spitzer Archive
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Reg Target name (G1)
10- 17 I8 --- AOR Astronomical Object Request number
19- 23 I5 --- PID Spitzer Program IDentification number
25- 26 I2 h RAh AOR central hour of right ascension (J2000)
28- 29 I2 min RAm AOR central minute of right ascension (J2000)
31- 34 F4.1 s RAs AOR central second of right ascension (J2000)
36 A1 --- DE- AOR central sign of declination (J2000)
37- 38 I2 deg DEd AOR central degree of declination (J2000)
40- 41 I2 arcmin DEm AOR central arcminute of declination (J2000)
43- 44 I2 arcsec DEs AOR central arcsecond of declination (J2000)
46- 50 F5.3 deg2 FOV [0.007/2] Total area of the AOR field of view
52- 56 F5.1 s/pix Int [10/125] Total integration time per pixel for
long frames
58- 68 A11 "YYYY/MMM/DD" Date Date of the start of the observation
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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- 17 A17 --- Name Source Name; GLLL.llll+BB.bbbb
19 A1 --- f_Name [AC] Flag for GLIMPSE Archive or Catalog (1)
21- 32 F12.7 deg RAdeg Right Ascension in decimal degrees (J2000)
34- 45 F12.7 deg DEdeg Declination in decimal degrees (J2000)
47- 51 F5.2 mag [3.6] ?=-9.99 Spitzer/IRAC 3.6um (Band 1) magnitude
53- 56 F4.2 mag e_[3.6] ?=9.99 The 1σ error on [3.6]
58- 62 F5.2 mag [4.5] ?=-9.99 Spitzer/IRAC 4.5um (Band 2) magnitude
64- 67 F4.2 mag e_[4.5] ?=9.99 The 1σ error on [4.5]
69- 73 F5.2 mag [5.8] ?=-9.99 Spitzer/IRAC 5.8um (Band 3) magnitude
75- 78 F4.2 mag e_[5.8] ?=9.99 The 1σ error on [5.8]
80- 84 F5.2 mag [8.0] ?=-9.99 Spitzer/IRAC 8.0um (Band 4) magnitude
86- 89 F4.2 mag e_[8.0] ?=9.99 The 1σ error on [8.0]
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Note (1): Flag as follows:
A = Source is only contained in the more complete Archive source list;
C = Source is contained in the more reliable Catalog source list.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Reg MYStIX Star-Forming Region Name (G1)
9- 25 A17 --- Name Source Name; GLLL.llll+BB.bbbb
27- 38 F12.7 deg RAdeg Right Ascension in decimal degrees (J2000)
40- 51 F12.7 deg DEdeg Declination in decimal degrees (J2000)
53- 57 F5.2 mag [3.6] Spitzer/IRAC 3.6um (Band 1) magnitude
59- 62 F4.2 mag e_[3.6] The 1σ error on [3.6]
64- 68 F5.2 mag [4.5] Spitzer/IRAC 4.5um (Band 2) magnitude
70- 73 F4.2 mag e_[4.5] The 1σ error on [4.5]
75- 79 F5.2 mag [5.8] ?=-9.99 Spitzer/IRAC 5.8um (Band 3) magnitude
81- 84 F4.2 mag e_[5.8] ?=9.99 The 1σ error on [5.8]
86- 90 F5.2 mag [8.0] ?=-9.99 Spitzer/IRAC 8.0um (Band 4) magnitude
92- 95 F4.2 mag e_[8.0] ?=9.99 The 1σ error on [8.0]
97- 98 I2 --- Ap [-1/4] Aperture Size Flag (1)
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Note (1): Flag as follows:
4 = 4-pixel aperture used;
3 = 3-pixel aperture used;
2 = 2-pixel aperture used and contaminating flux is <10% of source flux;
-1 = 2-pixel aperture used and contaminating flux is >10% of source flux.
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Global Notes:
Note (G1): 11 regions are studied: DR21, Flame, M17, NGC1893, NGC2264,
NGC2362, RCW36, Rosette, W3, W4, and W40
History:
From electronic version of the journal
References:
Feigelson et al. Overview. 2013ApJS..209...26F 2013ApJS..209...26F
Kuhn et al. X-ray sources. 2013ApJS..209...27K 2013ApJS..209...27K Cat. J/ApJS/209/27
King et al. Crowded fields. 2013ApJS..209...28K 2013ApJS..209...28K Cat. J/ApJS/209/28
Kuhn et al. MIR. 2013ApJS..209...29K 2013ApJS..209...29K (this paper)
Naylor et al. Bayesian matching. 2013ApJS..209...30N 2013ApJS..209...30N Cat. J/ApJS/209/30
Povich et al. IR excess cat. 2013ApJS..209...31P 2013ApJS..209...31P Cat. J/ApJS/209/31
Broos et al. Young stars. 2013ApJS..209...32B 2013ApJS..209...32B Cat. J/ApJS/209/32
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 09-Jan-2014