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J/MNRAS/462/2904    Final GMRT-TAU catalogue                 (Ainsworth+, 2016)

A GMRT survey of regions towards the Taurus molecular cloud at 323 and 608 MHz. Ainsworth R.E., Coughlan C.P., Green D.A., Scaife A.M.M., Ray T.P. <Mon. Not. R. Astron. Soc., 462, 2904-2917 (2016)> =2016MNRAS.462.2904A (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Molecular clouds ; Radio sources Keywords: catalogues - surveys - radio continuum: galaxies Abstract: We present observations of three active sites of star formation in the Taurus molecular cloud complex taken at 323 and 608MHz (90 and 50cm, respectively) with the Giant Metrewave Radio Telescope (GMRT). Three pointings were observed as part of a pathfinder project, targeted at the young stellar objects (YSOs) L1551 IRS 5, T Tau and DG Tau (the results for these target sources were presented in a previous paper). In this paper, we search for other YSOs and present a survey comprising of all three fields; a by-product of the large instantaneous field of view of the GMRT. The resolution of the survey is of order 10 arcsec and the best rms noise at the centre of each pointing is of order 100µJy/beam at 323MHz and 50µJy/beam at 608MHz. We present a catalogue of 1815 and 687 field sources detected above 5σrms at 323 and 608MHz, respectively. A total of 440 sources were detected at both frequencies, corresponding to a total unique source count of 2062 sources. We compare the results with previous surveys and showcase a sample of extended extragalactic objects. Although no further YSOs were detected in addition to the target YSOs based on our source-finding criteria, these data can be useful for targeted manual searches, studies of radio galaxies or to assist in the calibration of future observations with the Low-Frequency Array towards these regions. Description: The details of the observations and data reduction using the Astronomical Image Processing Software (aips) were presented in Ainsworth et al. (2016MNRAS.459.1248A). Observations centred on the young stars L1551 IRS 5, T Tau and DG Tau were made with the GMRT (see e.g. Ananthakrishnan, 2005, Int. Cosm. Ray Conf. 10 125) in 325 and 610 MHz observing modes between 2012 December 6 and 14 (average epoch 2012.95). Observations of 3C48, 3C147 or 3C286 were made at the beginning and end of each observing run to calibrate the flux-density scale. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 151 2062 The final GMRT-TAU catalogue
See also: II/332 : c2d Spitzer final data release (DR4) (Evans+, 2003) VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) J/A+A/468/353 : XMM-Newton Extended Survey of Taurus (Guedel+, 2007) J/ApJ/801/91 : Gould's Belt Very Large Array survey. IV. Taurus (Dzib+, 2015) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name GMRT-TAU name (JHHMMSS.ss+DDMMSS.s) 21- 22 I2 h RAh Right ascension (J2000.0) 24- 25 I2 min RAm Right ascension (J2000.0) 27- 32 F6.3 s RAs Right ascension (J2000.0) 34 A1 --- DE- Declination sign (J2000.0) 35- 36 I2 deg DEd Declination (J2000.0) 38- 39 I2 arcmin DEm Declination (J2000.0) 41- 45 F5.2 arcsec DEs Declination (J2000.0) 47- 53 F7.2 mJy/beam Sp323 ?=- 323MHz peak flux density 55- 59 F5.2 mJy/beam e_Sp323 ? rms uncertainty on 323MHz peak flux density 62- 68 F7.2 mJy Si323 ?=- 323MHz integrated flux density 70- 75 F6.2 mJy e_Si323 ? rms uncertainty on 323MHz integrated flux density 77- 80 I4 uJy/beam Res323 ?=- Local noise at 323MHz 82 A1 --- SCode323 [CMS-] PYBDSM code at 323MHz (1) 84- 89 F6.2 mJy/beam Sp608 ?=- 608MHz peak flux density 91- 95 F5.2 mJy/beam e_Sp608 ? rms uncertainty on 608MHz peak flux density 97-102 F6.2 mJy Si608 ?=- 608MHz integrated flux density 104-108 F5.2 mJy e_Si608 ? rms uncertainty on 608MHz integrated flux density 110-114 I5 uJy/beam Res608 ?=- Local noise at 608MHz 116 A1 --- SCode608 [CMS-] PYBDSM code at 608MHz (1) 118-122 F5.2 --- alphaGMRT ?=- GMRT spectral index α for sources detected at both 323 and 608MHz 124-127 F4.2 --- e_alphaGMRT ?=- rms uncertainty on GMRT spectral index 129 A1 --- NVSS [LBH-] Cross-reference with NVSS code (2) 131-135 F5.2 --- alphaNVSS ?=- NVSS spectral index α (3) 137-140 F4.2 --- e_alphaNVSS ?=- rms uncertainty on NVSS spectral index 142-151 A10 --- Ctp Known counterparts (4)
Note (1): PYBDSM codes as follows: S = single-Gaussian source that is the only source in the island of emission C = single-Gaussian source in an island with other sources M = multi-Gaussian source Note (2): Cross-reference with NVSS code as follows: L = a match with the lower frequency (323MHz) GMRT data only H = a match with the higher frequency (608MHz) GMRT data only B = indicates a match with both GMRT frequencies. Note (3): The corresponding GMRT to NVSS spectral index alphaNVSS is generated using two frequencies in the case of an 'L' or 'H' match, and three frequencies in the case of a 'B' match. Note (4): the known counterparts of a source cross-referenced with G = GBS-VLA (Dzib et al., 2015, Cat. J/ApJ/801/91) N = NVSS (Condon et al., 1998AJ....115.1693C, Cat. VIII/65) X = XMM-Newton extended survey of the Taurus molecular cloud (XEST; Gudel et al., 2007, Cat. J/A+A/468/353) 2M = Two Micron All Sky Survey (2MASS; Skrutskie et al., 2006AJ....131.1163S, Cat. VII/233) S = Spitzer c2d Legacy Program (Evans et al., 2003PASP..115..965E, Cat. II/332)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Feb-2018
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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