PIGSSBOOFD ivo://nasa.heasarc/pigssboofd NASA/GSFC HEASARC Bower et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The Pi GHz Sky Survey (PiGSS) is a key project of the Allen Telescope Array (ATA). PiGSS is a 3.1 GHz survey of radio continuum emission in the extragalactic sky with an emphasis on synoptic observations that measure the static and time-variable properties of the sky. During the 2.5 year campaign, PiGSS will twice observe ~250,000 radio sources in the 10,000 deg<sup>2</sup> region of the sky with b > 30 degrees to an rms sensitivity of ~1 mJy. Additionally, sub-regions of the sky will be observed multiple times to characterize variability on timescales of days to years. Presented here are the results from observations of a 10 deg<sup>2</sup> region in the Bootes constellation overlapping the NOAO Deep Wide Field Survey field. The PiGSS image was constructed from 75 daily observations distributed over a 4 month period and has an rms flux density between 200 and 250 µJy. This represents a deeper image by a factor of 4-8 than the authors will achieve over the entire 10,000 deg<sup>2</sup>. In this table, they provide flux densities, source sizes, and spectral indices for the 425 sources detected in the image. They identify ~100 new flat-spectrum radio sources, and project that, when completed, PiGSS will identify 104 flat-spectrum sources. In their paper the authors identify one source that is a possible transient radio source. This survey provides new limits on faint radio transients and variables with characteristic durations of months. This table was created by the HEASARC in March 2011 based on electronic versions of Tables 2 and 4 from the reference paper which were obtained from the ApJ web site. The HEASARC changed the sign of the values of the last parameter in Table 4 (herein called spectral_index_3_error) from negative to positive. In March 2013, after receiving a clarification from Steve Croft, the HEASARC corrected the names of the 4 parameters describing the source sizes (to reflect the fact that they were diameters nor radii) to major_axis, minor_axis, fit_major_axis and fit_minor_axis. This is a service provided by NASA HEASARC . 2010ApJ...725.1792B https://heasarc.gsfc.nasa.gov/W3Browse/all/pigssboofd.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=pigssboofd& GET text/xml 180 99999 true 217.8027 32.54486 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=pigssboofd GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_pigssboofd&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public pigssboofd Allen Telescope Array Pi GHz Sky Survey (PiGSS) Boo Field Source name Source Designation 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 ra_error Error in Right Ascension (arcsec) arcsec stat.error;pos.eq.ra;meta.main double nullable dec_error Error in Declination (arcsec) arcsec stat.error;pos.eq.dec;meta.main double nullable flux_3p1_ghz The 3.1-GHz Flux Density (mJy) mJy phot.flux.density;em.radio.3-6GHz double nullable flux_3p1_ghz_error Error in the 3.1-GHz Flux Density (mJy) mJy stat.error;phot.flux.density;em.radio.3-6GHz double nullable nvss_flux_20_cm NVSS Catalog 1.4-GHz Flux Density (mJy) mJy phot.flux.density;em.radio.750-1500MHz double nullable fit_major_axis Deconvolved Gaussian Major Axis (arcsec) arcsec phys.size.smajAxis double nullable spectral_index_1_error Error in 1400-MHz Spectral Index stat.error;spect.index;em.radio double nullable spectral_index_2_error Error in NVSS Spectral Index stat.error;spect.index;em.radio double nullable spectral_index_3 Spectral Index at 4850 MHz spect.index;em.radio double nullable flux_20_cm Flux Density at 1400 MHz (mJy) mJy phot.flux.density;em.radio.750-1500MHz double nullable bii Galactic Latitude degree pos.galactic.lat double nullable major_axis Measured Gaussian Major Axis (arcsec) arcsec phys.size.smajAxis double nullable spectral_index_3_error Error in 4850-MHz Spectral Index stat.error;spect.index;em.radio double nullable fit_position_angle Deconvolved Position Angle (degree) degree pos.posAng double nullable lii Galactic Longitude degree pos.galactic.lon double nullable fit_minor_axis Deconvolved Gaussian Minor Axis (arcsec) arcsec phys.size.sminAxis double nullable position_angle Measured Position Angle (degree) degree pos.posAng double nullable spectral_index_1 Spectral Index at 1400 MHz spect.index;em.radio double nullable minor_axis Measured Gaussian Minor Axis (arcsec) arcsec phys.size.sminAxis double nullable spectral_index_2 NVSS Spectral Index spect.index;em.radio double nullable flux_6_cm Flux Density at 4850 MHz (mJy) mJy phot.flux.density;em.radio.3-6GHz 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