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PACOBSCAT - Planck-ATCA Co-eval Observations (PACO) Project Bright Sample Catalog

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Overview

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 Snu = S0/[(nu/nu0)-a + (nu/nu0)-b], where nu is the frequency, Snu is the flux density in Jy, and S0, nu0, 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.


Catalog Bibcode

2011MNRAS.415.1597M

References

The Planck-ATCA Co-eval Observations project: the bright sample

   Massardi M., Bonaldi A., Bonavera L., Lopez-Caniego M., de Zotti G., Ekers R.D.
  <Monthly Notices of the Royal Astronomical Society, Volume 415, pp. 1597-1610>
   =2011MNRAS.415.1597M

Provenance

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).

Parameters

Name
The AT20G source designation based on the J2000.0 equatorial source coordinates, e.g., 'AT20G JHHMMSS+DDMMSS'.

RA
The Right Ascension of the radio source in the selected equinox. This was given in J2000.0 decimal hours to a precision of 10-7 hours in the original table.

Dec
The Declination of the radio source in the selected equinox. This was given in J2000.0 decimal hours to a precision of 10-7 degrees in the original table.

LII
The Galactic Longitude of the radio source.

BII
The Galactic Latitude of the radio source.

Time
The epoch of the ATCA observation given to the nearest day.

Planck_Flag
This flag is set to 's' to indicate that the epoch of the observation was within 10 days of the Planck observations of this source. The epochs before 2010 February have to be compared with the first Planck survey, whereas the following epochs should be compared with the second Planck survey.

Extended_Flag
This flag is set to 'e' to indicate that this is an extended source. Of the original 189 sources comprised in the PACO bright sample, 13 were flagged as extended in the AT20G catalogue and two more (J062706-352916 and J130527-492804) were found to be extended by the authors' 7-mm data analysis. Two of the 13 AT20G extended sources (J051926-454554 and J051949-454643) correspond to the core and to the western lobe of Pictor A. These observations were to be presented in a separate paper and the two sources were not included in this table. After the data reduction, seven extended sources (J040848-750720, J084127-754028, J130527-492804, J161505-605427, J193557-462043, J195817-550923, J235904-605503) turned out to have unreliable flux density estimates at all the frequencies and for all the days of observations. This is mostly due to having used too extended array configurations, so that the sensitivity on the observed scale was poor. They therefore were also not included in the present table. For all the other extended objects (J052257-362730, J062706- 352916, J074331-672625, J114531-483610, J132527-430104, J215706-694123) the estimated flux densities are lower limits to the integrated flux densities. Since these sources passed all the quality checks they have been included in this table, with flux densities listed as lower limits, but were excluded from further analysis in the reference paper.

Flux_4732_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 4732 MHz.

Flux_4732_MHz
The flux density, in mJy, of the source at 4732 MHz on the corresponding epoch of the observation.

Flux_5244_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 5244 MHz.

Flux_5244_MHz
The flux density, in mJy, of the source at 5244 MHz on the corresponding epoch of the observation.

Flux_5756_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 5756 MHz

Flux_5756_MHz
The flux density, in mJy, of the source at 5756 MHz on the corresponding epoch of the observation.

Flux_6268_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 6268 MHz

Flux_6268_MHz
The flux density, in mJy, of the source at 6268 MHz on the corresponding epoch of the observation.

Flux_8232_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 8232 MHz

Flux_8232_MHz
The flux density, in mJy, of the source at 8232 MHz on the corresponding epoch of the observation.

Flux_8744_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 8744 MHz.

Flux_8744_MHz
The flux density, in mJy, of the source at 8744 MHz on the corresponding epoch of the observation.

Flux_9256_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 9256 MHz.

Flux_9256_MHz
The flux density, in mJy, of the source at 9256 MHz on the corresponding epoch of the observation.

Flux_9768_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 9768 MHz.

Flux_9768_MHz
The flux density, in mJy, of the source at 9768 MHz on the corresponding epoch of the observation.

Flux_17232_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 17232 MHz.

Flux_17232_MHz
The flux density, in mJy, of the source at 17232 MHz on the corresponding epoch of the observation.

Flux_17744_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 17744 MHz.

Flux_17744_MHz
The flux density, in mJy, of the source at 17744 MHz on the corresponding epoch of the observation.

Flux_18256_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 18256 MHz.

Flux_18256_MHz
The flux density, in mJy, of the source at 18256 MHz on the corresponding epoch of the observation.

Flux_18768_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 18768 MHz.

Flux_18768_MHz
The flux density, in mJy, of the source at 18768 MHz on the corresponding epoch of the observation.

Flux_23232_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 23232 MHz.

Flux_23232_MHz
The flux density, in mJy, of the source at 23232 MHz on the corresponding epoch of the observation.

Flux_23744_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 23744 MHz.

Flux_23744_MHz
The flux density, in mJy, of the source at 23744 MHz on the corresponding epoch of the observation.

Flux_24256_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 24256 MHz.

Flux_24256_MHz
The flux density, in mJy, of the source at 24256 MHz on the corresponding epoch of the observation.

Flux_24768_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 24768 MHz.

Flux_24768_MHz
The flux density, in mJy, of the source at 24768 MHz on the corresponding epoch of the observation.

Flux_32232_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 32232 MHz.

Flux_32232_MHz
The flux density, in mJy, of the source at 32232 MHz on the corresponding epoch of the observation.

Flux_32744_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 32744 MHz.

Flux_32744_MHz
The flux density, in mJy, of the source at 32744 MHz on the corresponding epoch of the observation.

Flux_33256_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 33256 MHz.

Flux_33256_MHz
The flux density, in mJy, of the source at 33256 MHz on the corresponding epoch of the observation.

Flux_33768_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 33768 MHz.

Flux_33768_MHz
The flux density, in mJy, of the source at 33768 MHz on the corresponding epoch of the observation.

Flux_38232_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 38232 MHz.

Flux_38232_MHz
The flux density, in mJy, of the source at 38232 MHz on the corresponding epoch of the observation.

Flux_38744_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 38744 MHz.

Flux_38744_MHz
The flux density, in mJy, of the source at 38744 MHz on the corresponding epoch of the observation.

Flux_39256_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 39256 MHz.

Flux_39256_MHz
The flux density, in mJy, of the source at 39256 MHz on the corresponding epoch of the observation.

Flux_39768_MHz_Limit
This parameter is set to '>' if the corresponding flux density is a lower limit to the actual value, i.e., the source is extended and some flux was likely 'resolved out' in the observation at 39768 MHz.

Flux_39768_MHz
The flux density, in mJy, of the source at 39768 MHz on the corresponding epoch of the observation.

Flux_4732_MHz_Error
The uncertainty in the source flux density, in mJy, at 4732 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_5244_MHz_Error
The uncertainty in the source flux density, in mJy, at 5244 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_5756_MHz_Error
The uncertainty in the source flux density, in mJy, at 5756 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_6268_MHz_Error
The uncertainty in the source flux density, in mJy, at 6268 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_8232_MHz_Error
The uncertainty in the source flux density, in mJy, at 8232 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_8744_MHz_Error
The uncertainty in the source flux density, in mJy, at 8744 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_9256_MHz_Error
The uncertainty in the source flux density, in mJy, at 9256 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_9768_MHz_Error
The uncertainty in the source flux density, in mJy, at 9768 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_17232_MHz_Error
The uncertainty in the source flux density, in mJy, at 17232 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_17744_MHz_Error
The uncertainty in the source flux density, in mJy, at 17744 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_18256_MHz_Error
The uncertainty in the source flux density, in mJy, at 18256 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_18768_MHz_Error
The uncertainty in the source flux density, in mJy, at 18768 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_23232_MHz_Error
The uncertainty in the source flux density, in mJy, at 23232 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_23744_MHz_Error
The uncertainty in the source flux density, in mJy, at 23744 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_24256_MHz_Error
The uncertainty in the source flux density, in mJy, at 24256 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_24768_MHz_Error
The uncertainty in the source flux density, in mJy, at 24768 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_32232_MHz_Error
The uncertainty in the source flux density, in mJy, at 32232 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_32744_MHz_Error
The uncertainty in the source flux density, in mJy, at 32744 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_33256_MHz_Error
The uncertainty in the source flux density, in mJy, at 33256 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_33768_MHz_Error
The uncertainty in the source flux density, in mJy, at 33768 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_38232_MHz_Error
The uncertainty in the source flux density, in mJy, at 38232 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_38744_MHz_Error
The uncertainty in the source flux density, in mJy, at 38744 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_39256_MHz_Error
The uncertainty in the source flux density, in mJy, at 39256 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Flux_39768_MHz_Error
The uncertainty in the source flux density, in mJy, at 39768 MHz. The final error bars for each point source in each epoch have been estimated as the square root of the square of the gain term multiplied by the source flux density plus the square of the noise term. See Section 2 of the reference paper for a more complete discussion.

Best_Fit_A
The best-fit value of the parameter a (the first power-law spectral index) in the spectral fit model (see Overview above for more details).

Best_Fit_B
The best-fit value of the parameter b (the second power-law spectral index) in the spectral fit model (see Overview above for more details).

Best_Fit_Nu_0
The best-fit value of the reference frequency parameter nu0, in GHz, in the spectral fit model (see Overview above for more details).

Best_Fit_Flux_0
The best-fit value of the reference flux parameter S0, in Jy, in the spectral fit model (see Overview above for more details).

Reduced_Chi_Squared
The reduced chi-squared value of the best-fit spectral model (see Overview above for more details).


Contact Person

Questions regarding the PACOBSCAT database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 17-Jan-2014