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J/ApJ/671/1784      Ori OB1 IRAC/MIPS observations           (Hernandez+, 2007)

Spitzer observations of the Orion OB1 association: disk census in the low-mass stars. Hernandez J., Calvet N., Briceno C., Hartmann L., Vivas A.K., Muzerolle J., Downes J., Allen L., Gutermuth R. <Astrophys. J., 671, 1784-1799 (2007)> =2007ApJ...671.1784H
ADC_Keywords: Associations, stellar ; Photometry, millimetric/submm Keywords: infrared: stars - open clusters and associations: individual (Orion OB1 association) - planetary systems: protoplanetary disks - stars: pre-main sequence Abstract: We present new Spitzer observations of two fields in the Orion OB1 association. We report IRAC/MIPS observations for 115 confirmed members and 41 photometric candidates of the ∼10Myr 25 Orionis aggregate in the OB1a subassociation, and 106 confirmed members and 65 photometric candidates of the 5Myr region located in the OB1b subassociation. Description: We have obtained near-infrared (NIR) and mid-infrared photometry of two regions in the Orion OB1 association using the four channels (3.6, 4.5, 5.8, and 8.0um) of the InfraRed Array Camera (IRAC), and the 24um band of the Multiband Imaging Spectrometer (MIPS), on board the Spitzer Space Telescope. Optical (V and Ic) magnitudes were obtained from the CIDA Variability Survey which is being carried out using the QUEST I camera installed on the Jurgen Stock Telescope (a celar aperture 1m Schmidt Telescope) at the Venezuela National Astronomical Observatory. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 118 115 Members of the 25 Orionis aggregate (OB1a sub-association) table2.dat 118 107 Members of the OB1b sub-association table3.dat 136 41 Photometric candidates of the 25 Orionis aggregate table4.dat 136 65 Photometric candidates of the OB1b sub-association
See also: II/36 : UBV & uvby-beta obs. of Orion OB1 Association (Warren+ 1977) J/A+A/289/101 : Orion OB1 association. I. (Brown+, 1994) J/AJ/129/907 : New Ori OB1 members (Briceno+, 2005) Byte-by-byte Description of file: table[12].dat
Bytes Format Units Label Explanations
1- 4 A4 --- OB1 [OB1ab] sub-association designation (G1) 6- 9 I4 --- Seq Source identification (G1) 11- 26 A16 --- 2MASS 2MASS source identification, HHMMSSss+DDMMSSs 28- 35 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000) 37- 44 F8.5 deg DEdeg Declination in decimal degrees (J2000) 46- 51 F6.3 mag 3.6mag Spitzer/IRAC 3.6 micron band magnitude 53- 57 F5.3 mag e_3.6mag Uncertainty in 3.6mag 59- 64 F6.3 mag 4.5mag Spitzer/IRAC 4.5 micron band magnitude 66- 70 F5.3 mag e_4.5mag Uncertainty in 4.5mag 72- 77 F6.3 mag 5.8mag Spitzer/IRAC 5.8 micron band magnitude 79- 83 F5.3 mag e_5.8mag Uncertainty in 5.8mag 85- 90 F6.3 mag 8.0mag Spitzer/IRAC 8.0 micron band magnitude 92- 96 F5.3 mag e_8.0mag Uncertainty in 8.0mag 98-102 F5.2 mag 24mag ? Spitzer/MIPS 24 micron band magnitude 104-107 F4.2 mag e_24mag ? Uncertainty in 24mag 109 I1 --- Ref Optical reference (1) 111-118 A8 --- DType Disk type (G2)
Note (1): References as follows: 1 = Briceno et al. (2005, Cat. J/AJ/129/907) 2 = Briceno et al. (2007, Cat. J/ApJ/661/1119) 3 = Briceno et al. (2007, in Protostars and Planets V, ed. B. Reipurth, D. Jewitt, and K. Keil (Tucson: Univ. Arizona Press), 345
Byte-by-byte Description of file: table[34].dat
Bytes Format Units Label Explanations
1- 4 A4 --- OB1 [OB1ab] sub-association designation (G1) 6- 9 I4 --- Seq Source identification (G1) 11- 26 A16 --- 2MASS The 2MASS source identification, HHMMSSss+DDMMSSs 28- 35 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000) 37- 44 F8.5 deg DEdeg Declination in decimal degrees (J2000) 46- 51 F6.3 mag 3.6mag Spitzer/IRAC 3.6 micron band magnitude 53- 57 F5.3 mag e_3.6mag Uncertainty in 3.6mag 59- 64 F6.3 mag 4.5mag Spitzer/IRAC 4.5 micron band magnitude 66- 70 F5.3 mag e_4.5mag Uncertainty in 4.5mag 72- 77 F6.3 mag 5.8mag Spitzer/IRAC 5.8 micron band magnitude 79- 83 F5.3 mag e_5.8mag Uncertainty in 5.8mag 85- 90 F6.3 mag 8.0mag Spitzer/IRAC 8.0 micron band magnitude 92- 96 F5.3 mag e_8.0mag Uncertainty in 8.0mag 98-101 F4.2 mag 24mag ? Spitzer/MIPS 24 micron band magnitude 103-106 F4.2 mag e_24mag ? Uncertainty in 24mag 108-112 F5.2 mag Vmag The V band magnitude from the CIDA survey 114-117 F4.2 mag e_Vmag Uncertainty in Vmag 119-122 F4.2 mag V-I The V-I colour index from the CIDA survey 124-127 F4.2 mag e_V-I Uncertainty in V-I 129-136 A8 --- DType Disk type (G2)
Global notes: Note (G1): members or candidates of "OB1a" sub-association identified as [HCB2007] OB1a NNN (tables 1 and 3); members or candidates of "OB1b" sub-association identified as [HCB2007] OB1b NNN (tables 2 and 4). Note (G2): Disk type code is: CIII = disk less star CII = optically thick disk EV = evolved disk TD = transitional disk candidate disk[8]? = excess at 8 micron but no MIPS detections
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 29-Mar-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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