PACOBSCAT ivo://nasa.heasarc/pacobscat NASA/GSFC HEASARC Massardi et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The Planck Australia Telescope Compact Array (Planck-ATCA) Co-eval Observations (PACO) have provided flux density measurements of well-defined samples of Australia Telescope 20-GHz (AT20G) radio sources at frequencies below and overlapping with Planck frequency bands, almost simultaneously with Planck observations. The authors have observed with the ATCA a total of 482 sources in the frequency range between 4.5 and 40 GHz in the period between 2009 July and 2010 August. Several sources were observed more than once. In their paper, the authors present the aims of the project, the selection criteria, and the observation and data reduction procedures. They also discuss the data in total intensity for a complete sample of 189 sources with 20-GHz flux densities > 500 mJy, Galactic latitude |b| > 5 degrees and Declination < -30 degrees, and some statistical analysis of the spectral behavior and variability of this sample, referred to as the 'bright PACO sample'. Finally, the authors discuss how these data could be used to transfer absolute calibrations to ground-based telescopes using the cosmic microwave background dipole calibrated flux densities measured by the Planck satellite, and they provide some test fluxes on bright calibrators. This table contains the catalog of 1004 observations of 180 of the 189 sources that comprise the 'bright PACO sample'. Thus, each row in this table corresponds to a specific observation of a source, and there can be several rows for any source, corresponding to different observations. The ATCA observations were made in 6 2-GHz wide observing bands: 4732 - 6780 MHz, 8232 - 10280 MHz, 17232 - 19280 MHz, 23232 - 25280 MHz, 32232 - 34280 MHz and 38232 - 40280 MHz. In order to properly define the detailed source spectral behavior, the authors have split each 2-GHz band into 4 x 512 MHz sub-bands, and calibrated each sub-band independently. Thus, for each observation, the flux density at 24 frequencies is given. The frequency identifier in the flux density appears (at least to this HEASARC scientist) to be the lower frequency of the sub-band rather than its central frequency. In order to provide the easiest way to extrapolate the observed counts or model predictions from one frequency to another, the authors have modeled the observed source spectra. As their observations covered a wide frequency range from 4.5 to 40 GHz over which a single power law is not enough to describe the spectral behavior of the sources, they studied the spectra of the 174 point-like sources in this sample by fitting the observed data with a double power law of the form S<sub>nu</sub> = S<sub>0</sub>/[(nu/nu<sub>0</sub>)<sup>-a</sup> + (nu/nu<sub>0</sub>)<sup>-b</sup>], where nu is the frequency, S<sub>nu</sub> is the flux density in Jy, and S<sub>0</sub>, nu<sub>0</sub>, a and b are free parameters. The authors considered only those sources for which they had at least four data points for each of the 2 x 2 GHz bands considered. Full details of the fitting procedure are given in Section 3.1 of the reference paper. This table was created by the HEASARC in January 2014 based on the machine-readable version of Table S1 from the reference paper which was obtained from the CDS (their catalog J/MNRAS/415/1597 file table1.dat). This is a service provided by NASA HEASARC . 2011MNRAS.415.1597M https://heasarc.gsfc.nasa.gov/W3Browse/all/pacobscat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=pacobscat& GET text/xml 180 99999 true 178.2238305 -83.7362747 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=pacobscat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_pacobscat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public pacobscat Planck-ATCA Co-eval Observations (PACO) Project Bright Sample Ca name Source Designation (AT20G JHHMMSS+DDMMSS) meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable "time" Observation Date mjd time.start;obs int nullable flux_4732_mhz_limit Limit Flag for PACO Flux at 4732 MHz meta.code;phot.flux.density;em.radio.3-6GHz char nullable flux_4732_mhz PACO Flux at 4732 MHz mJy phot.flux.density;em.radio.3-6GHz int nullable flux_4732_mhz_error RMS Uncertainty in PACO Flux at 4732 MHz mJy stat.error;phot.flux.density;em.radio.3-6GHz double nullable flux_39768_mhz_limit Limit Flag for PACO Flux at 39768 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_39768_mhz PACO Flux at 39768 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_39768_mhz_error RMS Uncertainty in PACO Flux at 39768 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable flux_6268_mhz_error RMS Uncertainty in PACO Flux at 6268 MHz mJy stat.error;phot.flux.density;em.radio.6-12GHz double nullable planck_flag Flag [s] Indicates Epochs within 10 Days of Planck Observations meta.code char nullable flux_9768_mhz PACO Flux at 9768 MHz mJy phot.flux.density;em.radio.6-12GHz int nullable flux_6268_mhz PACO Flux at 6268 MHz mJy phot.flux.density;em.radio.6-12GHz int nullable flux_33768_mhz_limit Limit Flag for PACO Flux at 33768 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_18768_mhz PACO Flux at 18768 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable best_fit_flux_0 Best-Fit Parameter S_0 Jy stat.param double nullable flux_5756_mhz_limit Limit Flag for PACO Flux at 5756 MHz meta.code;phot.flux.density;em.radio.3-6GHz char nullable flux_9768_mhz_limit Limit Flag for PACO Flux at 9768 MHz meta.code;phot.flux.density;em.radio.6-12GHz char nullable flux_18256_mhz_error RMS Uncertainty in PACO Flux at 18256 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_33768_mhz PACO Flux at 33768 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_24768_mhz PACO Flux at 24768 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable flux_23232_mhz_error RMS Uncertainty in PACO Flux at 23232 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_8744_mhz_limit Limit Flag for PACO Flux at 8744 MHz meta.code;phot.flux.density;em.radio.6-12GHz char nullable flux_24768_mhz_error RMS Uncertainty in PACO Flux at 24768 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_18768_mhz_error RMS Uncertainty in PACO Flux at 18768 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_17232_mhz PACO Flux at 17232 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable flux_38744_mhz_limit Limit Flag for PACO Flux at 38744 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable best_fit_nu_0 Best-Fit Parameter nu_0 GHz stat.param double nullable flux_38232_mhz PACO Flux at 38232 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_39256_mhz PACO Flux at 39256 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable lii Galactic Longitude degree pos.galactic.lon double nullable flux_24256_mhz_error RMS Uncertainty in PACO Flux at 24256 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_8744_mhz_error RMS Uncertainty in PACO Flux at 8744 MHz mJy stat.error;phot.flux.density;em.radio.6-12GHz double nullable flux_38744_mhz_error RMS Uncertainty in PACO Flux at 38744 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_33256_mhz_limit Limit Flag for PACO Flux at 33256 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_17744_mhz PACO Flux at 17744 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable best_fit_b Best-Fit Parameter b stat.param double nullable flux_18256_mhz PACO Flux at 18256 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable flux_6268_mhz_limit Limit Flag for PACO Flux at 6268 MHz meta.code;phot.flux.density;em.radio.6-12GHz char nullable flux_32744_mhz_error RMS Uncertainty in PACO Flux at 32744 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_24768_mhz_limit Limit Flag for PACO Flux at 24768 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_23232_mhz_limit Limit Flag for PACO Flux at 23232 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_38744_mhz PACO Flux at 38744 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_24256_mhz_limit Limit Flag for PACO Flux at 24256 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_39256_mhz_limit Limit Flag for PACO Flux at 39256 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_23744_mhz PACO Flux at 23744 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable bii Galactic Latitude degree pos.galactic.lat double nullable flux_18768_mhz_limit Limit Flag for PACO Flux at 18768 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_17744_mhz_limit Limit Flag for PACO Flux at 17744 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_33256_mhz_error RMS Uncertainty in PACO Flux at 33256 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_5244_mhz_error RMS Uncertainty in PACO Flux at 5244 MHz mJy stat.error;phot.flux.density;em.radio.3-6GHz double nullable flux_33256_mhz PACO Flux at 33256 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_24256_mhz PACO Flux at 24256 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable flux_32744_mhz_limit Limit Flag for PACO Flux at 32744 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_9256_mhz_limit Limit Flag for PACO Flux at 9256 MHz meta.code;phot.flux.density;em.radio.6-12GHz char nullable flux_5756_mhz_error RMS Uncertainty in PACO Flux at 5756 MHz mJy stat.error;phot.flux.density;em.radio.3-6GHz double nullable flux_5244_mhz_limit Limit Flag for PACO Flux at 5244 MHz meta.code;phot.flux.density;em.radio.3-6GHz char nullable flux_18256_mhz_limit Limit Flag for PACO Flux at 18256 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_9768_mhz_error RMS Uncertainty in PACO Flux at 9768 MHz mJy stat.error;phot.flux.density;em.radio.6-12GHz double nullable flux_32744_mhz PACO Flux at 32744 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_5244_mhz PACO Flux at 5244 MHz mJy phot.flux.density;em.radio.3-6GHz int nullable flux_39256_mhz_error RMS Uncertainty in PACO Flux at 39256 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_23744_mhz_limit Limit Flag for PACO Flux at 23744 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable flux_17744_mhz_error RMS Uncertainty in PACO Flux at 17744 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_9256_mhz PACO Flux at 9256 MHz mJy phot.flux.density;em.radio.6-12GHz int nullable flux_17232_mhz_limit Limit Flag for PACO Flux at 17232 MHz meta.code;phot.flux.density;em.radio.12-30GHz char nullable extended_flag Flag [e] Indicates Extended Sources meta.code;phys.angSize char nullable flux_8232_mhz_error RMS Uncertainty in PACO Flux at 8232 MHz mJy stat.error;phot.flux.density;em.radio.6-12GHz double nullable flux_38232_mhz_error RMS Uncertainty in PACO Flux at 38232 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable best_fit_a Best-Fit Parameter a stat.param double nullable flux_32232_mhz PACO Flux at 32232 MHz mJy phot.flux.density;em.mm.30-50GHz int nullable flux_8744_mhz PACO Flux at 8744 MHz mJy phot.flux.density;em.radio.6-12GHz int nullable flux_23744_mhz_error RMS Uncertainty in PACO Flux at 23744 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable flux_9256_mhz_error RMS Uncertainty in PACO Flux at 9256 MHz mJy stat.error;phot.flux.density;em.radio.6-12GHz double nullable flux_33768_mhz_error RMS Uncertainty in PACO Flux at 33768 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_23232_mhz PACO Flux at 23232 MHz mJy phot.flux.density;em.radio.12-30GHz int nullable flux_32232_mhz_error RMS Uncertainty in PACO Flux at 32232 MHz mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_8232_mhz_limit Limit Flag for PACO Flux at 8232 MHz meta.code;phot.flux.density;em.radio.6-12GHz char nullable reduced_chi_squared Best-Fit Parameter Chi^2 stat.fit.chi2 double nullable flux_32232_mhz_limit Limit Flag for PACO Flux at 32232 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_38232_mhz_limit Limit Flag for PACO Flux at 38232 MHz meta.code;phot.flux.density;em.mm.30-50GHz char nullable flux_8232_mhz PACO Flux at 8232 MHz mJy phot.flux.density;em.radio.6-12GHz int nullable flux_5756_mhz PACO Flux at 5756 MHz mJy phot.flux.density;em.radio.3-6GHz int nullable flux_17232_mhz_error RMS Uncertainty in PACO Flux at 17232 MHz mJy stat.error;phot.flux.density;em.radio.12-30GHz double nullable