... Initial Setup Tasks . ... IFP#1-LO 6641 - 6657 MHz USB RCP . ... IFP#1-HI 6657 - 6673 MHz USB RCP . ... IFP#2-LO 6641 - 6657 MHz USB LCP . ... IFP#2-HI 6657 - 6673 MHz USB LCP . ... IFP#1-LO 6300 - 6316 MHz USB LCP . ... IFP#1-HI 6316 - 6332 MHz USB LCP . ... Ftp: ftp://ftp.atnf.csiro.au/pub/people/vlbi/v255/v255a . ... The 4 x 16 MHz bandpass setup will require feeding two separate LOs into IFP#1 and #2 on the DAS/frequency translator and splitting the LCP signal so that is feed into both sides. ...

Next: CORRELATOR BOARDS Up: OBSERVING PROCEDURES Previous: Frequency Switching . ... Continuum sources in the list used for flux density calibration were selected in an ad-hoc fashion from a variety of places, but primarily from Kuehr et al (A&AS, 45, 367, 1981), the compendium of linearly polarized sources by Tabara & Inoue (A&AS, 39, 379, 1980), and an unpublished list of unconfused calibrator sources prepared from the NVSS survey by Jim Condon and Qi Feng Yin. ... Board 0 . ...

Next: Code II: Unknown Up: Image Restorations of High Previous: Construction of Algorithms . ... The positions of the designated point sources ( ) must be given as well as initial amplitudes for and . ... The integrated flux of the point sources ( ) plus that of the distributed emission ( ) is constrained to equal that of the observed image ( ). ... This is investigated in Fig. 1 where all emission derives from point sources but only one - the brightest - is designated as such. ...

... Accurate positions of 404 compact radio sources used as calibrators by the VLA are presented. In addition, the structure and polarization of each source at both 4885 and 1465 MHz are given. ... Amplitude calibration was based on 3C286, whose fluxes at 4885 and 1465 MHz were assumed to be 7.41 and 14.41 Jy, respectively, in accord with the scale of Baars et al. (1977). short description of columns, as taken from the publication: . 1 source name . ... 8 Polarized flux at 4885 MHz (mJy) . ...

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

... Archives . ... Quote of the Week, July 12, 2007 . ArXiv] Complete Catalog of GRBs from BeppoSAX, July 13, 2007 . Jul 13th, 2007| 07:24 pm | ... From arxiv/astro-ph: 0707.1611 Probabilistic Cross-Identification of Astronomical Sources by Budavari and Szalay . As multi-wave length studies become more popular, various source matching methodologies have been discussed. ... Are there any power related studies on source matching statistics? ... Chandra Blog . ... Stat S/W Resources . ...

. Comment on J1842+7946 . Comparing the brightnesses of the two main features seen in our 5 GHz image with higher frequency VLBI images available in the literature (at 8.4 GHz from the USNO database and at 15 GHz by Kellermann et al. (1998)), one can conclude that the NW component has a steeper spectrum since the SE one becomes relatively stronger as the observing frequency increases. VLBApls home page . Last modified: 16 Oct 2000

... Astrophysics Group . ... The 9C survey of radio sources was made with the Ryle Telescope at a frequency of 15.2 GHz and a resolution of 25ТљxТљ25Тљcosec(dec) arcsec 2 . ... Waldram, E.M., Pooley, G.G., Grainge, K.J.B., Jones, M.E., Saunders, R.D.E., Scott, P.F., Taylor, A.C., 2003, MNRAS, 342, 915 . ... Field name . ... It comprises seven fields, each delineated by boundaries in RA and Dec, together covering a total of 114.7 deg 2 for which the source catalogue is complete to ~ 10 mJy. ...