J/MNRAS/455/3249 Planck-ATCA Co-eval Observations project (Massardi+, 2016) ================================================================================ The Planck-ATCA Co-eval Observations project: analysis of radio source properties between 5 and 217 GHz. Massardi M., Bonaldi A., Bonavera L., De Zotti G., Lopez-Caniego M., Galluzzi V. =2016MNRAS.455.3249M (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Galaxies, radio ; Active gal. nuclei Keywords: catalogues - galaxies: active - radio continuum: galaxies Abstract: The Planck-ATCA Co-eval Observations (PACO) project has yielded observations of 464 sources with the Australia Telescope Compact Array (ATCA) between 4.5 and 40GHz. The main purpose of the project was to investigate the spectral properties of mm-selected radio sources at frequencies below and overlapping with the ESA's Planck satellite frequency bands, minimizing the variability effects by observing almost simultaneously with the first two Planck all-sky surveys. In this paper we present the whole catalogue of observations in total intensity. By comparing PACO with the various measures of Planck Catalog of Compact Sources (PCCS) flux densities we found the best consistency with the PCCS 'detection pipeline' photometry (DETFLUX) that we used to investigate the spectral properties of sources from 5 to 217GHz. Of our sources, 91 percent have remarkably smooth spectrum, well described by a double power-law over the full range. This suggests a single emitting region, at variance with the notion that `flat' spectra result from the superposition of the emissions from different compact regions, self-absorbed up to different frequencies. Most of the objects show a spectral steepening above =~30GHz, consistent with synchrotron emission becoming optically thin. Thus, the classical dichotomy between flat-spectrum/compact and steep-spectrum/extended radio sources, well established at cm wavelengths, breaks down at mm wavelengths. The mm-wave spectra do not show indications of the spectral break expected as the effect of `electron ageing', suggesting young source ages. Description: The PACO samples were selected from the AT20G catalogue (Murphy et al. 2010, Cat. J/MNRAS/402/2403) down to flux densities well below the expected detection limits for the first two Planck surveys in order to investigate both sources that could be detected by Planck and the contribution to confusion below the satellite detection limits. Poisson fluctuations due to unresolved extragalactic radio sources are, in fact, the main contaminant of Planck cosmic microwave background (CMB) maps on angular scales smaller than 20-30arcmin at frequencies of up to ~100GHz and are dominated by sources just below the detection limit The final list of sources observed in the framework of the PACO project has 482 AT20G sources at Galactic latitude |b|>5{deg} classified as extragalactic. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file paco.dat 387 2343 PACO full sample catalogue pacopccs.dat 313 264 PACO full catalogue of integrated flux densities and PLANCK matches -------------------------------------------------------------------------------- See also: J/MNRAS/402/2403 : Australia Tel. 20GHz Survey Catalog, AT20G (Murphy+, 2010) J/MNRAS/415/1597 : PACO catalogue of bright sources (Massardi+, 2011) J/MNRAS/416/559 : PACO faint sources catalog (Bonavera+, 2011) J/MNRAS/428/1845 : PACO spectrally selected sample (Bonaldi+, 2013) Byte-by-byte Description of file: paco.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 A5 --- --- [AT20G] 6- 19 A14 --- AT20G AT20G name (JHHMMSS+DDMMSS) 22- 31 F10.7 h RAhour right ascension in decimal hours (J2000) 33- 43 F11.7 deg DEdeg Declination in decimal degrees (J2000) 46- 55 A10 "date" Obs.date Observing date 57 A1 --- fs [s.] Flag "s" to identify epochs within 10days from Planck observations 59 A1 --- fe [e.] Flag "e" for extended sources 60 A1 --- l_S4732 Limit flag on S4732 61- 65 I5 mJy S4732 Flux at PACO frequency S4732 MHz 66 A1 --- l_S5244 Limit flag on S5244 67- 71 I5 mJy S5244 Flux at PACO frequency S5244 MHz 72 A1 --- l_S5756 Limit flag on S5756 73- 77 I5 mJy S5756 Flux at PACO frequency S5756 MHz 78 A1 --- l_S6268 Limit flag on S5756 79- 83 I5 mJy S6268 Flux at PACO frequency S6268 MHz 84 A1 --- l_S8232 Limit flag on S8232 85- 89 I5 mJy S8232 Flux at PACO frequency S8232 MHz 90 A1 --- l_S8744 Limit flag on S8744 91- 95 I5 mJy S8744 Flux at PACO frequency S8744 MHz 96 A1 --- l_S9256 Limit flag on S9256 97-101 I5 mJy S9256 Flux at PACO frequency S9256 MHz 102 A1 --- l_S9768 Limit flag on S9768 103-107 I5 mJy S9768 Flux at PACO frequency S9768 MHz 108 A1 --- l_S17232 Limit flag on S17232 109-113 I5 mJy S17232 Flux at PACO frequency S17232 MHz 114 A1 --- l_S17744 Limit flag on S17744 115-119 I5 mJy S17744 Flux at PACO frequency S17744 MHz 120 A1 --- l_S18256 Limit flag on S18256 121-125 I5 mJy S18256 Flux at PACO frequency S18256 MHz 126 A1 --- l_S18768 Limit flag on S18768 127-131 I5 mJy S18768 Flux at PACO frequency S18768 MHz 132 A1 --- l_S23232 Limit flag on S23232 133-137 I5 mJy S23232 Flux at PACO frequency S23232 MHz 138 A1 --- l_S23744 Limit flag on S23744 139-143 I5 mJy S23744 Flux at PACO frequency S23744 MHz 144 A1 --- l_S24256 Limit flag on S24256 145-149 I5 mJy S24256 Flux at PACO frequency S24256 MHz 150 A1 --- l_S24768 Limit flag on S24256 151-155 I5 mJy S24768 Flux at PACO frequency S24768 MHz 156 A1 --- l_S32232 Limit flag on S32232 157-161 I5 mJy S32232 Flux at PACO frequency S32232 MHz 162 A1 --- l_S32744 Limit flag on S32744 163-167 I5 mJy S32744 Flux at PACO frequency S32744 MHz 168 A1 --- l_S33256 Limit flag on S32744 169-173 I5 mJy S33256 Flux at PACO frequency S33256 MHz 174 A1 --- l_S33768 Limit flag on S33768 175-179 I5 mJy S33768 Flux at PACO frequency S33768 MHz 180 A1 --- l_S38232 Limit flag on S38232 181-185 I5 mJy S38232 Flux at PACO frequency S38232 MHz 186 A1 --- l_S38744 Limit flag on S38744 187-191 I5 mJy S38744 Flux at PACO frequency S38744 MHz 192 A1 --- l_S39256 Limit flag on S39256 193-197 I5 mJy S39256 Flux at PACO frequency S39256 MHz 198 A1 --- l_S39768 Limit flag on S39768 199-203 I5 mJy S39768 Flux at PACO frequency S39768 MHz 205-209 F5.1 mJy e_S4732 rms uncertainty on S4732 211-215 F5.1 mJy e_S5244 rms uncertainty on S5244 217-221 F5.1 mJy e_S5756 rms uncertainty on S5756 223-227 F5.1 mJy e_S6268 rms uncertainty on S6268 229-233 F5.1 mJy e_S8232 rms uncertainty on S8232 235-239 F5.1 mJy e_S8744 rms uncertainty on S8744 241-245 F5.1 mJy e_S9256 rms uncertainty on S9256 247-251 F5.1 mJy e_S9768 rms uncertainty on S9768 253-257 F5.1 mJy e_S17232 rms uncertainty on S17232 259-263 F5.1 mJy e_S17744 rms uncertainty on S17744 265-269 F5.1 mJy e_S18256 rms uncertainty on S18256 271-275 F5.1 mJy e_S18768 rms uncertainty on S18768 277-281 F5.1 mJy e_S23232 rms uncertainty on S23232 283-287 F5.1 mJy e_S23744 rms uncertainty on S23744 289-293 F5.1 mJy e_S24256 rms uncertainty on S24256 295-299 F5.1 mJy e_S24768 rms uncertainty on S24768 301-305 F5.1 mJy e_S32232 rms uncertainty on S32232 307-311 F5.1 mJy e_S32744 rms uncertainty on S32744 313-317 F5.1 mJy e_S33256 rms uncertainty on S33256 319-323 F5.1 mJy e_S33768 rms uncertainty on S33768 325-329 F5.1 mJy e_S38232 rms uncertainty on S38232 331-335 F5.1 mJy e_S38744 rms uncertainty on S38744 337-341 F5.1 mJy e_S39256 rms uncertainty on S39256 343-347 F5.1 mJy e_S39768 rms uncertainty on S39768 350-355 F6.3 --- a Best fit parameter a (G1) 358-363 F6.3 --- b Best fit parameter b (G1) 366-371 F6.3 --- v0 Best fit parameter v0 (G1) 374-379 F6.3 --- S0 Best fit parameter S0 (G1) 383-387 F5.3 --- chi2 Best fit parameter chi^2^ -------------------------------------------------------------------------------- Byte-by-byte Description of file: pacopccs.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 A5 --- --- [AT20G] 6- 19 A14 --- AT20G AT20G name (JHHMMSS+DDMMSS) 22- 31 F10.7 h RAhour Right ascension in decimal hours (J2000) 33- 43 F11.7 deg DEdeg Declination in decimal degrees (J2000) 45- 50 I6 mJy S5500 Integrated flux density at PACO frequency 5500MHz 52- 57 I6 mJy S9000 Integrated flux density at PACO frequency 9000MHz 59- 64 I6 mJy S18000 Integrated flux density at PACO frequency 18000MHz 66- 71 I6 mJy S24000 Integrated flux density at PACO frequency 24000MHz 73- 78 I6 mJy S33000 Integrated flux density at PACO frequency 33000MHz 80- 85 I6 mJy S39000 Integrated flux density at PACO frequency 39000MHz 88- 93 F6.1 mJy e_S5500 rms uncertainty on S5500 96-101 F6.1 mJy e_S9000 rms uncertainty on S9000 104-109 F6.1 mJy e_S18000 rms uncertainty on S18000 112-117 F6.1 mJy e_S24000 rms uncertainty on S24000 120-125 F6.1 mJy e_S33000 rms uncertainty on S33000 128-133 F6.1 mJy e_S39000 rms uncertainty on S39000 135-140 I6 mJy Sp30 Flux density at Planck frequency 30GHz (central frequency 28.1GHz) 142-147 I6 mJy Sp44 Flux density at Planck frequency 44GHz (central frequency 44.1GHz) 149-154 I6 mJy Sp70 Flux density at Planck frequency 70GHz (central frequency 70.4GHz) 156-161 I6 mJy Sp100 Flux density at Planck frequency 100GHz 163-168 I6 mJy Sp143 Flux density at Planck frequency 143GHz 170-175 I6 mJy Sp217 Flux density at Planck frequency 217GHz 177-182 I6 mJy Sp353 Flux density at Planck frequency 353GHz 184-189 I6 mJy Sp545 Flux density at Planck frequency 545GHz 191-196 I6 mJy Sp857 Flux density at Planck frequency 857GHz 199-204 F6.1 mJy e_Sp30 rms uncertainty on e_Sp30 207-212 F6.1 mJy e_Sp44 rms uncertainty on e_Sp44 215-220 F6.1 mJy e_Sp70 rms uncertainty on e_Sp70 223-228 F6.1 mJy e_Sp100 rms uncertainty on e_Sp100 231-236 F6.1 mJy e_Sp143 rms uncertainty on e_Sp143 239-244 F6.1 mJy e_Sp217 rms uncertainty on e_Sp217 247-252 F6.1 mJy e_Sp353 rms uncertainty on e_Sp353 255-260 F6.1 mJy e_Sp545 rms uncertainty on e_Sp545 263-268 F6.1 mJy e_Sp857 rms uncertainty on e_Sp857 272-277 F6.3 --- a Best fit parameter a (G1) 281-286 F6.3 --- b Best fit parameter b (G1) 289-295 F7.3 --- v0 Best fit parameter {nu}_0_ (G1) 299-304 F6.3 --- S0 Best fit parameter S_0_ (G1) 309-313 F5.3 --- chi2 Best fit parameter chi^2^ -------------------------------------------------------------------------------- Global notes: Note (G1): Best fit parameters in the double power law: S({nu})=S_0_/[({nu}/{nu}_0_)^-a^+({nu}/{nu}_0_)^-b^], where {nu} is the frequency and S is the flux density in Jy. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 29-Jul-2016