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V/98                    MSX Infrared Astrometric Catalog (Egan+ 1996)

The MSX Infrared Astrometric Catalog Egan M.P., Price S.D. <Astron. J 112, 2862 (1996)> =1996AJ....112.2862E
ADC_Keywords: Infrared sources ; Proper motions ; Spectroscopy ; Cross identifications Mission_Name: MSX Abstract: The MSX Infrared Astrometric Catalog has been contructed as a tool for improving the pointing accuracy of infrared observations. The catalog contains 177,860 astrometric stars, 61,242 which have been identified with their infrared counterparts from IRAS catalogs and the Catalog of Infrared Observations through position and color matching. Infrared flux densities are predicted for 6 wavelength bands between 4 and 22um. The catalog identifications are complete to within the spatial coverage of current surveys for those astrometric stars brightest in the infrared. By predicting fluxes of astrometric stars without IR identifications we are able to extend the catalog to areas of the sky which were incomplete in the IRAS catalogs. Furthermore, by retaining stars below the brightness limit of current surveys we are able to provide better spatial coverage to help point or position the next generation of infrared telescopes. Description: This version of the MSX IR Astrometric Catalog is a truncated version of the documentation which exists for the convenience of the user and is primarily intended to allow quick access to the file formats and other information needed to access the information. The AJ paper contains the definitive information about the catalog itself. The MSX IR Astrometric Catalog, Version 4.2.1 was constructed from a number of visible astrometric catalogs, and contains position information accurate to the sub-arcsecond level. The FK5 (1988 Fricke Schwan & Lederle, Cat. I/149), FK5 Extension (1991 Fricke, Schwan & Corbin, Cat. I/175), Astrographic Catalog of Reference Stars (1991 Corbin & Urban, Cat. I/171), Position and Proper Motion Catalog (1988 Roeser & Bastian, Cat. I/146) and PPM South (1991 Bastian et al., Cat. I/193) were the sources of position and magnitude information. The PPM and FK5 catalogs contain 1-D spectral type information, and this was supplemented where possible with 2-D MK spectral types. The ACRS and PPM quote photographic magnitudes. These were transformed to V magnitude using the spectral type and expected B-V color. Spatial coincidence and color-matching criteria (based on V-[12] color and spectral type) were used to identify IR counterparts of the astrometric stars. The IRAS Point Source (Cat. II/125), Faint Source (Cat. II/156), Faint Source Reject file, and Serendipitous Survey (Cat. II/126) catalogs were used to supply IR observations, as was the Catalog of Infrared Observations (1993 Gezari et al., Cat II/209). The infrared telescope (SPIRIT III) aboard the Ballistic Missile Defense Organization (BMDO) Midcourse Space Experiment (MSX) (Mill et al., 1994, J. of Spacecraft & Rockets 31, 900) has detectors which allow spatial resolution 30 times better than that achieved by IRAS The IR flux in each SPIRIT III band was estimated using the V magnitude, spectral type, and IR flux (if available) to determine a blackbody spectrum for the star, which was then convolved with the system spectral response of each SPIRIT III radiometer band. Stars which were brighter than 8th magnitude in band A were retained in the final MSX IR astrometric catalog. In MSXv4.2.1, there are 177860 stars, 61242 of which had IR counterparts. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file msx.dat 221 177860 MSX Infrared Astrometric Catalog
See also: : MSX page : SPIRIT III page : SPIRIT III results V/107 : MSX5C Infrared Point Source Catalog (Egan+ 1999) II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986) II/126 : IRAS Serendipitous Survey Catalog (Kleinmann+ 1986) II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989) II/209 : Catalog of Infrared observations, Edition 3.5 (Gezari+ 1996) Byte-by-byte Description of file: msx.dat
Bytes Format Units Label Explanations
1 A1 --- AsID *[FfANS] Original astrometric catalog ID 2- 7 I6 --- AsName Astrometric catalog number 8 A1 --- IrID *[PFSBZC] IR catalog ID 9- 21 A13 --- IrName Name of star in IR catalog 22- 23 I2 h RAh Right ascension, J2000 24- 25 I2 min RAm Right ascension, J2000 26- 31 F6.3 s RAs Right ascension, J2000 32 A1 --- DE- Sign of declination 33- 34 I2 deg DEd Declination, J2000 35- 36 I2 arcmin DEm Declination, J2000 37- 41 F5.2 arcsec DEs Declination, J2000 42- 47 F6.1 ms e_RAs Mean R.A. error*cos(dec) 48- 52 F5.1 0.01arcsec e_DEs Mean declination error 53- 61 F9.3 10-2s/yr pmRA Proper motion in right ascension (J2000) 62- 70 F9.2 10-2arcsec/yr pmDE Proper motion in declination (J2000) 71- 76 F6.1 0.1mas/yr e_pmRA Mean error of R.A. PM*cos(dec) 77- 82 F6.1 0.1mas/yr e_pmDE Mean error of Dec. PM 83- 85 A3 --- Sp *Spectral type 86- 87 A2 --- LRS IRAS LRS designation 88- 92 F5.2 mag Vmag V visual magnitude 93-101 E9.3 Jy F12um ?=0.000E+00 IRAS 12mu flux 102-110 E9.3 Jy F25um ?=0.000E+00 IRAS 25mu flux 111-119 E9.3 Jy F60um ?=0.000E+00 IRAS 60mu flux 120-128 E9.3 Jy F100um ?=0.000E+00 IRAS 100mu flux 129 I1 --- q_F12um IRAS 12um flux quality flag 130 I1 --- q_F25um IRAS 25um flux quality flag 131 I1 --- q_F60um IRAS 60um flux quality flag 132 I1 --- q_F100um IRAS 100um flux quality flag 133-141 E9.3 Jy FSIIIA *SPIRIT III Band A flux density estimate 142-150 E9.3 Jy FSIIIB1 *SPIRIT III Band B1 flux density estimate 151-159 E9.3 Jy FSIIIB2 *SPIRIT III Band B2 flux density estimate 160-168 E9.3 Jy FSIIIC *SPIRIT III Band C flux density estimate 169-177 E9.3 Jy FSIIID *SPIRIT III Band D flux density estimate 178-186 E9.3 Jy FSIIIE *SPIRIT III Band E flux density estimate 187-195 E9.3 Jy F12umEst Estimated IRAS 12 micron flux 196-199 F4.1 um Lam1 *? Wavelength of CIO observation 200-208 E9.3 Jy Flux1 *? Corresponding Flux of CIO observation 209-212 F4.1 um Lam2 *? Wavelength of CIO observation 213-221 E9.3 Jy Flux2 *? Corresponding Flux of CIO observation
Note on AsID: F FK5, Cat. I/149 f FK5 Extension, Cat. I/175 A ACRS, Cat. I/171 N PPM, Cat. I/146 S PPM South, Cat. I/193 Note on IrID: P IRAS Point Source Catalog, Cat. II/125 F IRAS Faint Source Catalog, Cat. II/156 B Combined PSC/FSC data, Cat. II/125 and Cat. II/156 Z IRAS Faint Source Reject S IRAS Serendiptious Survey, Cat. II/126 C Catalog of IR Observations, Cat. II/209 Note on Sp: Coded spectral type, e.g. G83 = G8 III; G80 = G8 Note on Lam1, Lam2, Flux1, Flux2: These values were originally embedded in the IRAS Fxxum columns. Note on FSIIIA, FSIIIB1, FSIIIB2, FSIIIC, FSIIID, FSIIIE: the wavelength domains are specified by the central wavelength (isophotal wavelength) and the FWHM wavelength range (in µm): ---------------------------- Band Center FWHM Points ---------------------------- A 8.28 6.8 - 10.8 B1 4.29 4.22 - 4.36 B2 4.25 4.24 - 4.45 C 12.13 11.1 - 13.2 D 14.65 13.5 - 15.9 E 21.34 18.2 - 25.1 ----------------------------
History: * 06-Nov-1996: AAS CD-ROM series, Volume 7, 1996, Lee Brotzman [ADS] * 04-Dec-1997: Wavelength + fluxes from CIO disentangled from IRAS fluxes
(End) Francois Ochsenbein [CDS] 04-Dec-1997
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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