{
  "editedOn": 1777052983667,
  "eventId": "XRF 040701",
  "submitter": "Derek Fox at CIT  <derekfox@astro.caltech.edu>",
  "circularId": 2628,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov>",
  "bibcode": "2004GCN..2628....1C",
  "body": "P.B. Cameron and D.B. Fox (Caltech) with D.A. Frail (NRAO) report on\nbehalf of a larger collaboration:\n\n\"We have made several targeted observations within and near the\nlocalization region for XRF040701 (Barraud et al., GCN 2620) with the\nVLA in D-configuration, on July 12, 2004, from 08:19 to 09:48:49 UT.\nThe chief aim was to provide full coverage of the brighter part of the\nChandra source catalog (Fox, GCN 2626); however, the resulting\npointings provide coverage of approximately 75% of the region at\nX-band (8.4 GHz) and approximately 10% of the region in C-band (4.9\nGHz).\n\nWe detect five sources within our coverage area, one of which is an\nNRAO VLA Sky Survey (NVSS) 1.4-GHz source, and none of which are\ncoincident with Chandra sources. In addition, we have marginal (~2\nsigma) detections at the positions of three Chandra sources.  The\nfollowing table reports the VLA source positions, frequency of\ndetection, and flux in mJy, with uncertainties in the final digits\ngiven in parentheses.  In addition, we note whether the particular\nsource was detected in the NVSS (Y/N), which has an average RMS noise\nlevel of 0.45 mJy/beam at 1.4 GHz but technically is only complete to\na declination of -40 degrees.\n\n VLA#  RA            Dec           Freq    Flux     NVSS?\n ==========================================================\n   1   20 47 37.968  -40 15 44.65  8.35   1.01(10)   N\n   2   20 47 07.707  -40 15 48.02  8.35   0.76(09)   Y\n   3   20 47 35.965  -40 13 34.72  8.35   0.48(10)   N\n   4   20 47 52.542  -40 12 36.45  8.35   0.47(10)   N\n   5   20 47 29.041  -40 11 28.94  8.35   0.32(09)   N\n ==========================================================\n\nWe note that VLA source #1 is coincident with a bright star-like\nsource and USNO B-1.0 object from the DSS.\n\nThe following table reports our marginal ~2-sigma detections at the\npositions of sources from the Chandra catalog.  We give the Chandra ID\nnumber and name from Fox (GCN 2626), the frequency of observation, and\nthe estimated flux in mJy with uncertainties in the final digits given\nin parentheses.  In addition, we indicate whether the source has a\ncounterpart in the DSS (Y/N).\n\n Chandra#  Name                    Freq    Flux      DSS?\n ===========================================================\n    2      CXOU J204816.1-401108   8.35   0.22(10)    Y\n   16      CXOU J204712.3-401112   8.35   0.19(09)    N\n   25      CXOU J204749.9-400627   8.35   0.23(10)    Y \n ===========================================================\n\nChandra source #2, which is associated with a z=0.2146 emission-line\ngalaxy (Kelson et al., GCN 2627) has a marginal detection in X-band\nbut not C-band.\"",
  "email": "derekfox@astro.caltech.edu",
  "version": 2,
  "createdOn": 1089756434000,
  "subject": "XRF040701: VLA Observations"
}