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VIII/96           6-GHz methanol multibeam maser catalogue   (Caswell+, 2010-12)

The 6-GHz methanol multibeam maser catalogue. I. Galactic centre region, longitudes 345° to 6°. II. Galactic longitudes 6° to 20°. III. Galactic longitudes 330° to 345°. IV. Galactic longitudes 186°-330° including the Orion-Monoceros region. Caswell J.L., Fuller G.A., Green J.A., Avison A., Breen S.L., Brooks K.J., Burton M.G., Chrysostomou A., Cox J., Diamond P.J., Ellingsen S.P., Gray M.D., Hoare M.G., Masheder M.R.W., McClure-Griffiths N.M., Pestalozzi M.R., Phillips C.J., Quinn L., Thompson M.A., Voronkov M.A., Walsh A.J., Ward-Thompson D., Wong-McSweeney D., Yates J.A., Cohen R.J. <Mon. Not. R. Astron. Soc., 404, 1029-1060 (2010); 409, 913-935 (2010); 417, 1964-1995 (2011); 420, 3108-3125 (2012)> =2010MNRAS.404.1029C +2010MNRAS.409..913G +2011MNRAS.417.1964C +2012MNRAS.420.3108G =2014yCat.8096....0C
ADC_Keywords: Surveys ; Masers ; Radio sources Keywords: masers - surveys - stars: formation - ISM: molecules Abstract: We have conducted a Galactic plane survey of methanol masers at 6668 MHz using a seven-beam receiver on the Parkes telescope, refered to as MX observations. Paper I provides sensitive unbiased coverage of a large region around the Galactic Centre. Details are given for 183 methanol maser sites in the longitude range 345° through the Galactic Centre to 6°. Within 6° of the Galactic Centre, we found 88 maser sites, of which more than half (48) are new discoveries. The masers are confined to a narrow Galactic latitude range, indicative of many sources at the Galactic Centre distance and beyond, and confined to a thin disc population; there is no high-latitude population that might be ascribed to the Galactic bulge. Paper II spans the longitude range 6° to 20°. We report the detection of 119 maser sources, of which 42 are new discoveries. Paper III covers the longitude range 330°-345°, yielding 198 masers, of which more than 40 per cent are new discoveries. Paper IV span the longitude range 186°-330°. We report 207 maser detections, 89 new to the survey. This completes the southern sky part of the methanol multibeam survey and includes a large proportion of new sources, 43 per cent. We also include results from blind observations of the Orion-Monoceros star-forming region, formally outside the latitude range of the methanol multibeam survey; only the four previously known methanol emitting sites were detected, of which we present new positions and spectra for masers at Orion A (south) and Orion B, obtained with the Multi-Element Radio Linked Interferometer Network (MERLIN) array. Description: The detailed plans, strategy, and some sample results from the MMB survey have been described by Green et al. (2009MNRAS.392..783G). In summary, for the present southern sky observations, we first use the Parkes 64-m radio telescope, equipped with a seven-beam receiver, and then complement this with accurate position measurements from the Australia Telescope Compact Array (ATCA). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 114 707 Methanol maser positions observed on Parkes table2.dat 41 45 Sources associated with the 3-kpc arms as identified by Green et al. (2009ApJ...696L.156G) and Caswell et al. (Paper I, 2010MNRAS.404.1029C) (from Paper II, 2010MNRAS.409..913G) notes.dat 80 2408 Individual notes
Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name Source name (LLL.lll+BB.BBB) 15 A1 --- f_Name [+a] Flag on Name (1) 17- 18 I2 h RAh Right ascension (J2000) (2) 20- 21 I2 min RAm Right ascension (J2000) (2) 23- 27 F5.2 s RAs Right ascension (J2000) (2) 29 A1 --- DE- Declination sign (J2000) (2) 30- 31 I2 deg DEd Declination (J2000) (2) 33- 34 I2 arcmin DEm Declination (J2000) (2) 36- 39 F4.1 arcsec DEs Declination (J2000) (2) 41- 46 F6.1 km/s VL Lower value of velocity range 49- 54 F6.1 km/s VH Upper value of velocity range 57- 62 F6.1 km/s VpkMX ?=- Peak velocity at 6668MHz from MX spectrum 64 A1 --- l_SpkMX Limit flag on SpkMX 65- 71 F7.2 Jy SpkMX ?=- MX peak flux density at 6668MHz 72 A1 --- f_SpkMX [b] Flag on SpkMK (1) 74- 79 F6.1 km/s VpkSC ?=- Peak velocity at 6668MHz from Survey Cube 81 A1 --- l_SpkSC Limit flag on SpkSC 82- 88 F7.2 Jy SpkSC ?=- Survey cube peak flux density at 6668MHz 90-114 A25 --- Ref References and/or epoch (3)
Note (1): Flags as follows: + = position from single-dish observations only a = The source is possibly thermal (see main text for details) b = these were specific epoch MX observation values as the sources were undetected at other epochs (see individual source notes for details) Note (2): Position is from non-bracketed reference. Note (3): Reference abbreviations are as follows: B02 = Beuther et al. (2002A&A...390..289B) C+95 = Caswell et al. (1995MNRAS.272...96C) C2009 = Caswell (2009PASA...26..454C, Cat. J/other/PASA/26.454) C96 = Caswell (1996MNRAS.279...79C) C97 = Caswell (1997MNRAS.289..203C) CP2008 = Caswell & Phillips (2008MNRAS.386.1521C) CVF95 = Caswell, Vaile & Forster (1995MNRAS.277..210C) HW1995 = Houghton & Whiteoak (1995MNRAS.273.1033H) M01 = Minier, Conway & Booth (2001A&A...369..278M) M03 = Minier et al. (2003A&A...403.1095M, Cat. J/A+A/403/1095) MERLIN = MERLIN observations P98 = Phillips et al. (1998MNRAS.300.1131P) V05 = Voronkov et al. (2005MNRAS.362..995V) W97 = Walsh et al. (1997MNRAS.291..261W, Cat. J/MNRAS/291/261) W98 = Walsh et al. (1998MNRAS.301..640W, Cat. J/MNRAS/301/640) X08 = Xu et al. (2008A&A...485..729X) X09 = Xu et al. (2009A&A...507.1117X)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Source name (LLL.lll+B.BBB) 14 A1 --- r_Name [ab] Reference of source (1) 16- 21 F6.1 km/s Vpk Peak velocity at 6668MHz 23- 28 F6.1 km/s Vmid Mean velocity at 6668MHz 30- 36 F7.2 Jy Spk Peak flux density at 6668MHz 38- 41 A4 --- Arm [Far Near] Arm location
Note (1): For source details see: a = Caswell et al. (Paper I, 2010MNRAS.404.1029C) b = Green et al. (Paper II, 2010MNRAS.409..913G)
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name Source name (LLL.lll+BB.BBB) 16- 80 A65 --- Note Text of the note
History: From electronic version of the journal References: Caswell et al., Paper I 2010MNRAS.404.1029C (Galactic centre and l=345-6) Green et al., Paper II 2010MNRAS.409..913G (l=6-20) Caswell et al., Paper III 2011MNRAS.417.1964C (l=330-345) Green et al., Paper IV 2012MNRAS.420.3108G (l=186-330)
(End) Patricia Vannier [CDS] 13-May-2014
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