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J/ApJ/704/652   Radio transients in a 1.4GHz drift-scan survey  (Niinuma+, 2009)

Discovery of two radio transients at a high galactic latitude in a 1.4 GHz drift-scan survey. Niinuma K., Daishido T., Matsumura N., Takefuji K., Kuniyoshi M., Asuma K., Kida S., Tanaka T., Aoki T., Ishikawa S., Hirano K., Uehara H., Nakagawa S. <Astrophys. J., 704, 652-660 (2009)> =2009ApJ...704..652N
ADC_Keywords: Radio continuum ; QSOs ; Galaxies, radio ; Redshifts ; Cross identifications ; Interferometry Keywords: radio continuum: general - stars: variables: other - techniques: interferometric Abstract: We report two new radio transients at high Galactic latitude, WJN J0951+3300 (RA=09h51m22s±10s, DE=33°00'±0.4°, b=50°54.2') and WJN J1039+3300 (RA=10h39m26s±10s, DE=33°00'±0.4°, b=60°58.5'), which were detected by interferometric drift-scan observations at 1.4GHz at the Waseda Nasu Pulsar Observatory. WJN J0951+3300 was detected at 16:49:32UT on 2006 January 12 with the flux density of approximately 1760.5±265.9mJy, and WJN J1039+3300 was detected at 17:13:32UT on 2006 January 18 with the flux density of approximately 2242.5±228.7mJy. Both of them lasted for a short duration (≤2 days). The possibility that the distribution of the WJN radio transients is isotropic was suggested in a previous study. Having re-evaluated the log N-log S relation with the addition of the two new objects reported in this paper, we find that the slope is consistent with a slope of -1.5 and the previous result. Additionally, although there are several counterparts to WJN radio transients, we found that one of the quasar counterparts within the positional error of WJN J0951+3300 could be a radio-loud quasar. We have discussed whether or not WJN J0951+3300 could be of this quasar origin. Description: Since 2004, the laboratory at Waseda University has been conducting a project at the Waseda Nasu Pulsar Observatory, located 160km north of Tokyo. The observatory was designed to conduct wide-field surveys at 1.42GHz with Δν=20MHz, in order to search for radio transients, unidentified variable radio sources, and unknown pulsars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 74 66 List of galaxy/quasar counterparts to the WJN radio transients
See also: V/134 : Atlas of Radio/X-ray associations (ARXA) (Flesch, 2010) VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003) J/PASP/120/339 : Nasu Radio-Transient Search Project (Takefuji+, 2008) J/AJ/127/1959 : 1.4GHz emission of KISS galaxies (Van Duyne+, 2004) J/A+A/427/387 : QORG catalog of radio/X-ray sources (Flesch+, 2004) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [WJN] 5- 14 A10 --- WJN WJN object name (JHHMM+DDMM) (8 sources) (1) 16- 39 A24 --- Name Counterpart name 41- 42 I2 h RAh Counterpart hour of right ascension (J2000) 44- 45 I2 min RAm Counterpart minute of right ascension (J2000) 47- 50 F4.1 s RAs Counterpart second of right ascension (J2000) 52 A1 --- DE- Sign of declination (J2000) 53- 54 I2 deg DEd Counterpart degree of declination (J2000) 56- 57 I2 arcmin DEm Counterpart arcminute of declination (J2000) 59- 60 I2 arcsec DEs Counterpart arcsecond of declination (J2000) 62- 64 A3 --- Type Object type (G or QSO) 65 A1 --- f_Type [cd] Questionable type (2) 67- 74 F8.6 --- z ? Redshift
Note (1): WJN J0445+4130 and J1043+4130 are reported by Matsumura et al. 2007AJ....133.1441M; WJN J0645+3200 and J1039+3200 are reported by Kida et al. 2008NewA...13..519K; WJN J1443+3439 is reported by Niinuma et al. 2007ApJ...657L..37N and WJN J1737+3808 by Kuniyoshi et al. 2007PASP..119..122K. WJN J0951+3300 and J1039+3300 are from this paper. Note (2): Flag as follows: c = Unclassified source (75%: G, 20%: QSO) in Flesch & Hardcastle (2004, Cat. J/A+A/427/387; obsoleted by Cat. V/134). d = This source is classified as a QSO with the probability of 95% in Flesch & Hardcastle (2004, Cat. J/A+A/427/387; obsoleted by Cat. V/134).
History: From electronic version of the journal 18-Dec-2011: Insert into VizieR 04-Apr-2012: Counterpart 2MASX J17365403+3746376 of object 63 corrected for 2MASX J17365300+3814336 by CDS.
(End) Emmanuelle Perret [CDS] 10-Nov-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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