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J/A+A/481/411  submm point sources from the Archeops experiment  (Desert+, 2008)

Submillimetre point sources from the Archeops experiment: very cold clumps in the Galactic plane. Desert F.-X., Macias-Perez J.F., Mayet F., Giardino G., Renault C., Aumont J., Benoit A., Bernard J.-P., Ponthieu N., Tristram M. <Astron. Astrophys. 481, 411 (2008)> =2008A&A...481..411D
ADC_Keywords: Interstellar medium ; Millimetric/submm sources Keywords: ISM: general - ISM: clouds - methods: data analysis - cosmology: observations - submillimeter - catalogs Abstract: Archeops is a balloon-borne experiment, mainly designed to measure the Cosmic Microwave Background (CMB) temperature anisotropies at high angular resolution (∼12 arcminutes). By-products of the mission are shallow sensitivity maps over a large fraction of the sky (about 30 %) in the millimetre and submillimetre range at 143, 217, 353 and 545GHz. From these maps, we produce a catalog of bright submillimetre point sources. We present in this paper the processing and analysis of the Archeops point sources. Redundancy across detectors is the key factor allowing us to distinguish glitches from genuine point sources in the 20 independent maps. We look at the properties of the most reliable point sources, totalling 304. Fluxes range from 1 to 10000Jy (at the frequencies covering 143 to 545GHz). All sources are either planets (2) or of galactic origin. The longitude range is from 75 to 198-degrees. Some of the sources are associated with the well-known Lynds Nebulae and HII compact regions in the galactic plane. A large fraction of the sources have an IRAS counterpart. Except for Jupiter, Saturn, the Crab and Cas A, all sources show a dust-emission-like modified blackbody emission spectrum. Temperatures cover a range from 7 to 27K. For the coldest sources (T<10K), a steep nubeta emissivity law is found with a surprising beta∼3 to 4. An inverse relationship between T and beta is observed. The number density of sources at 353GHz with flux brighter than 100Jy is of the order of 1 per degree of Galactic longitude. These sources will provide a strong check for the calibration of the Planck HFI focal plane geometry as a complement to planets. These very cold sources observed by Archeops should be prime targets for mapping observations by the Akari and Herschel space missions and ground-based observatories. Description: Table 3 gives coordinates and basic photometric properties. The name of the source gives the galactic coordinates in degrees. Fluxes and 1-sigma errors are in Jy, assuming a Rayleigh-Jeans color and for the 4 frequencies of 143, 217, 353 and 545GHz. No available measurements are quoted as (sigma=-1). Upper limits are quoted at the 2-sigma level. The bright sources with an asterisk have positional uncertainties larger than the nominal 4arcmin (1-sigma). Table 4 gives the model fit parameters and associations. For each point source, the emissivity exponent beta and temperature T are given along with the reduced chi^2 value. When the fit is unsatisfactory, beta11 (assuming a fixed temperature of 11K), or T2 (assuming a fixed exponent index of 2) are provided instead. The associated Iras source is given along with the far infrared fluxes. A star by the name of the Iras counterpart indicates that the Iras source has the Iras colors of an ultra-compact HII region. Then associations with a commonly used name are given with Lynds Dark Nebulae, Bright Nebulae, Sharpless and other common catalogs. Associations with HII regions (with angular size le 10arcmin) from the catalogue by Paladini et al. (2003, Cat. J/A+A/397/213) are also given. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 105 302 Cloud position and fluxes table4.dat 139 302 Cloud model fit parameters and associations
See also: J/A+A/397/213 : Galactic HII regions (Paladini+, 2003) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [DMM2008] [1/302] Sequential number 5- 8 A4 --- --- [Arch] 9- 21 A13 --- Arch Arch name ( 22 A1 --- n_Arch [*] * for positional uncertainty >4' (1sigma) 24- 25 I2 h RAh Right ascension (J2000) 27- 28 I2 min RAm Right ascension (J2000) 30- 33 F4.1 s RAs Right ascension (J2000) 35 A1 --- DE- Declination sign (J2000) 36- 37 I2 deg DEd Declination (J2000) 39- 40 I2 arcmin DEm Declination (J2000) 42- 43 I2 arcsec DEs Declination (J2000) 45 A1 --- l_F143 Limit flag on F143 46- 50 F5.1 Jy F143 Flux density at 143GHz 52- 54 F3.1 Jy e_F143 rms uncertainty on F143 56 A1 --- l_S/N143 Limit flag on S/N143 57- 59 I3 --- S/N143 Signal-to-noise ratio for F143 61 A1 --- l_F217 Limit flag on F217 62- 67 F6.1 Jy F217 Flux density at 217GHz 69- 72 F4.1 Jy e_F217 rms uncertainty on F217 74 A1 --- l_S/N217 Limit flag on S/N217 75- 77 I3 --- S/N217 Signal-to-noise ratio for F217 79 A1 --- l_F353 Limit flag on F353 80- 83 I4 Jy F353 ?=0 Flux density at 353GHz 85- 86 I2 Jy e_F353 ?=-1 rms uncertainty on F353 88 A1 --- l_S/N353 Limit flag on S/N353 89- 90 I2 --- S/N353 ?=0 Signal-to-noise ratio for F353 92 A1 --- l_F545 Limit flag on F545 93- 96 I4 Jy F545 ?=0 Flux density at 545GHz 98-100 I3 Jy e_F545 ?=-1 rms uncertainty on F545 102 A1 --- l_S/N545 Limit flag on F545 103-105 I3 --- S/N545 ?=0 Signal-to-noise ratio for F545
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [DMM2008] [1/302] Sequential number 5- 8 A4 --- --- [Arch] 9- 21 A13 --- Arch Arch name ( 23- 26 F4.2 --- beta ? Emissivity exponent beta 28- 31 F4.2 --- e_beta ? rms uncertainty on beta 33- 37 F5.2 K T ? Temperature 39- 42 F4.2 K e_T ? rms uncertainty on T 44- 47 F4.2 --- chi2r ? Reduced chi2 value 49- 52 F4.2 --- beta11 ? Emissivity exponent beta for fixed T=11K 54- 57 F4.2 --- e_beta11 ? rms uncertainty on beta11 59- 63 F5.2 K T2 ? Temperature for fixed beta=2 65- 68 F4.2 K e_T2 ? rms uncertainty on T2 70- 80 A11 --- IRAS Associated IRAS source 81 A1 --- n_IRAS [*] * for IRAS source having IRAS colours of an ultra-compact HII region 83- 89 F7.1 Jy F100um ? IRAS flux at 100um 91- 97 F7.1 Jy F60um ? IRAS flux at 60um 99-139 A41 --- Name(s) Associations with a commonly used name with Lynds Dark Nebulae, Bright Nebulae, Sharpless and other common catalogs
Acknowledgements: Francois-Xavier Desert, francois-xavier.desert(at)
(End) Patricia Vannier [CDS] 14-Feb-2008
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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