GCPS ivo://nasa.heasarc/gcps NASA/GSFC HEASARC Nord et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The Galactic Center P-Band (330 MHz) Survey (GCPS) is based on wide-field, subarcminute-resolution Very Large Array (VLA) imagery of the Galactic center region at 330 MHz. With a resolution of ~7"x12" and an rms noise of 1.6 mJy/beam, this image represented a significant increase in resolution and sensitivity over the previously published VLA image at this frequency. The improved sensitivity more than tripled the census of small-diameter sources in the region, resulted in the detection of two new nonthermal filaments (NTFs), 18 NTF candidates, and 30 pulsar candidates, revealed previously known extended sources in greater detail, and has resulted in the first detection of Sagittarius A* in this frequency range. Two sets of observations were obtained. The first was conducted at 330 MHz in the A configuration of the VLA in 1996 October. The second set of P-band observations were obtained in the A and B configurations of the VLA between 1998 March and 1999 May. This Browse table was created by the HEASARC in May 2005 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/AJ/128/1646">CDS Catalog J/AJ/128/1646</a>, tables table2.dat and table3.dat. This is a service provided by NASA HEASARC . 2004AJ....128.1646N https://heasarc.gsfc.nasa.gov/W3Browse/all/gcps.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=gcps& GET text/xml 180 99999 true 266.94233333 -31.39272222 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=gcps GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_gcps&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public gcps Galactic Center P-Band (330 MHz) Survey name Catalog 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 flux_91_cm Maximum Intensity (mJy/beam, where FWHM of the beam is 12.58" by 6.81") mJy/beam phot.flux.density;em.radio.200-400MHz double nullable flux_91_cm_error Local RMS of the Image (mJy/beam, where FWHM of the beam is 12.58" by 6.81") mJy/beam stat.error;phot.flux.density;em.radio.200-400MHz double nullable int_flux_91_cm Flux Density at 330MHz (mJy) mJy phot.flux.density;em.radio.200-400MHz double nullable spect_index_1 Spectral Index (1.4-0.33GHz) for the GPSR Cross-Identification mJy spect.index double nullable alt_name_3 Alternative GPSR5 Catalog Designation meta.id.cross char nullable source_offset Source Offset from the Phase Center (arcmin) arcmin instr.offset double nullable alt_name_2 Alternative 2LC Catalog Designation meta.id.cross char nullable name_flag Flag [b] Indicates Transient Source (See Hyman et al. 2002AJ....123.1497H) meta.code;src.var char nullable spect_index_2 Spectral Index (1.4-0.33GHz) for the 2LC Cross-Identification mJy spect.index double nullable spect_index_3 Spectral Index (5-0.33GHz) for the GPSR5 Cross-Identification mJy spect.index double nullable bii Galactic Latitude degree pos.galactic.lat double nullable angular_diameter Average Deconvolved Size (arcsec) arcsec phys.angSize double nullable sequence_number GCPS Source Number meta.id short nullable lii Galactic Longitude degree pos.galactic.lon double nullable alt_name_1 Alternative GPSR Catalog Designation meta.id.cross char nullable comments Additional SIMBAD Information within 1 arcmin meta.note char 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