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J/ApJS/231/20        A new 95GHz methanol maser catalog. I.        (Yang+, 2017)

A new 95 GHz methanol maser catalog. I. Data. Yang W., Xu Y., Chen X., Ellingsen S.P., Lu D., Ju B., Li Y. <Astrophys. J. Suppl. Ser., 231, 20-20 (2017)> =2017ApJS..231...20Y (SIMBAD/NED BibCode)
ADC_Keywords: Radio lines ; Millimetric/submm sources ; Masers Keywords: ISM: molecules; masers; radio lines: ISM; stars: formation Abstract: The Purple Mountain Observatory 13.7m radio telescope has been used to search for 95GHz (80-71A+) class I methanol masers toward 1020 Bolocam Galactic Plane Survey (BGPS) sources, leading to 213 detections. We have compared the line width of the methanol and HCO+ thermal emission in all of the methanol detections, and on that basis, we find that 205 of the 213 detections are very likely to be masers. This corresponds to an overall detection rate of 95 GHz methanol masers toward our BGPS sample of 20%. Of the 205 detected masers, 144 (70%) are new discoveries. Combining our results with those of previous 95GHz methanol maser searches, a total of 481 95GHz methanol masers are now known. We have compiled a catalog listing the locations and properties of all known 95GHz methanol masers. Description: Our sample is selected from the BGPS (version 1.0.1; Rosolowsky+ J/ApJS/188/123; Aguirre+ 2011ApJS..192....4A), which is a 1.1mm continuum survey of the galactic plane in the northern hemisphere undertaken using the Caltech Submillimeter Observatory. From 8358 BGPS sources, we selected 1020 sources (>10% of the total BGPS sources) in total. The observations of the 80-71A+ class I methanol maser transition (assumed rest frequency 95.1694630GHz; Mueller+ 2004, J/A+A/428/1019) and 89.188526GHz HCO+ (J=1-0) were made with the Purple Mountain Observatory (PMO) 13.7m radio telescope in Delingha, China. Of the total sample of 1020 BGPS sources, the 982 BGPS sources that meet the criteria identified by Chen+ (2012, J/ApJS/200/5) were observed in the period May-June each year between 2012 and 2015, and the 38 BGPS sources selected from Manning+ (2016PASA...33...15M) were observed in 2016 June. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file bgps.dat 56 518 The 481 BGPS with detected 95GHz methanol masers and the 42 candidates from tables 1 and 2; table added by CDS table1.dat 135 1122 Parameters of all 481 detected 95GHz methanol masers table2.dat 135 42 Parameters of 95GHz methanol maser candidates table3.dat 31 807 807 BGPS sources for which no 95GHz methanol emission was detected table6.dat 58 347 Parameters of HCO+ emission towards in 212 BGPS sources with an associated 95GHz methanol emission table8.dat 58 869 Information of HCO+ without methanol masers emission
See also: J/AZh/72/22 : A 95 GHz Survey of Methanol Masers (Valtts+, 1995) J/MNRAS/301/640 : Ultracompact H II regions studies. II. (Walsh+, 1998) J/ApJS/155/149 : CH3OH 70-61 A+ maser sources (Kurtz+, 2004) J/A+A/428/1019 : Rest frequencies of methanol maser lines (Mueller+, 2004) J/MNRAS/359/1498 : Class I and class II methanol masers (Ellingsen+, 2005) J/MNRAS/366/1096 : Kinematic distance ambiguity (Busfield+, 2006) J/ApJ/639/227 : MSX IRDC candidate catalog (Simon+, 2006) J/AZh/84/579 : Catalog of Class I methanol masers (Val'tts+, 2007) J/ApJ/690/706 : Distances of Galactic HII regions (Anderson+, 2009) J/other/PASA/26.454 : Precise positions of methanol masers (Caswell, 2009) J/ApJ/702/1615 : CH3OH maser survey of EGOs (Cyganowski+, 2009) J/ApJ/721/137 : The Bolocam Galactic Plane Survey (BGPS) (Bally+, 2010) J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010) J/ApJS/196/9 : 95GHz methanol masers toward GLIMPSE EGOs (Chen+, 2011) J/ApJ/741/110 : The BGPS. VII. Massive star-forming regions (Dunham+, 2011) J/ApJS/195/14 : The BGPS. V. (Schlingman+, 2011) J/AZh/89/611 : Class I methanol maser catalog (Bayandina+, 2012) J/ApJS/200/5 : 95GHz class I methanol maser survey (Chen+, 2012) J/ApJS/206/9 : New EGOs from Spitzer GLIMPSE II survey. I. (Chen+, 2013) J/ApJS/206/22 : Newly EGOs from GLIMPSE II survey. II. MoC (Chen+, 2013) J/ApJ/763/2 : 95GHz methanol masers in molecular outflows (Gan+, 2013) J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014) J/MNRAS/439/2584 : Southern methanol masers at 36 and 44GHz (Voronkov+, 2014) J/ApJ/799/29 : BGPS. XII. DR2 distance catalog (Ellsworth-Bowers+, 2015) http://irsa.ipac.caltech.edu/data/BOLOCAM_GPS/ : Bolocam GPS archive Byte-by-byte Description of file: bgps.dat
Bytes Format Units Label Explanations
1 A1 --- f_Name c=candidate (from table 2) 3- 25 A23 --- Name Source name as in tables 1 and 2 27- 28 I2 h RAh Hour of Right Ascension (J2000) 30- 31 I2 min RAm Minute of Right Ascension (J2000) 33- 38 F6.3 s RAs Second of Right Ascension (J2000) 40 A1 --- DE- Sign of the Declination (J2000) 41- 42 I2 deg DEd Degree of Declination (J2000) 44- 45 I2 arcmin DEm Arcminute of Declination (J2000) 47- 51 F5.2 arcsec DEs Arcsecond of Declination (J2000) 53- 56 I4 --- ID ? BGPS number as in table 6
Byte-by-byte Description of file: table[12].dat
Bytes Format Units Label Explanations
1- 23 A23 --- Name Source name (1) 24 A1 --- m_Name [a-h] Maser component for Name (2) 26- 28 A3 --- f_Name Listed in Manning+ (2016PASA...33...15M) (3) 30- 31 I2 h RAh ? Hour of Right Ascension (J2000) 33- 34 I2 min RAm ? Minute of Right Ascension (J2000) 36- 41 F6.3 s RAs ? Second of Right Ascension (J2000) 43 A1 --- DE- Sign of the Declination (J2000) 44- 45 I2 deg DEd ? Degree of Declination (J2000) 47- 48 I2 arcmin DEm ? Arcminute of Declination (J2000) 50- 54 F5.2 arcsec DEs ? Arcsecond of Declination (J2000) 56- 63 F8.3 km/s Vlsr [-110/159] Peak local standard of rest velocity 65- 69 F5.3 km/s e_Vlsr [0/4] Uncertainty in Vlsr 71- 76 F6.3 km/s DV [0.1/19] Line FWHM 78- 83 F6.3 km/s e_DV [0/11] Uncertainty in DV 85- 90 F6.2 Jy Peak [0.5/267] Peak flux density 92- 97 F6.2 Jy.km/s Sint [0.2/523] Integrated flux density 99-104 F6.2 Jy.km/s e_Sint [0.03/153]? Uncertainty in Sint 106-112 F7.2 Jy.km/s Stot [0.5/1071]? Total integrated flux density 114-117 F4.2 Jy rms [0.1/3]? 1 sigma of the observations 119-123 F5.2 kpc Dist [0.2/17]? Distance 125-127 A3 --- r_Dist Reference about distance (4) 129-135 A7 --- Ref Reference for each source (5)
Note (1): Organized by increasing right ascension. Note (2): For multiple components at each position, a component label, e.g., a,b,c... is assigned. Position, total integrated flux density, observation noise, distance and references are provided only for the "a" component. Note (3): Sources marked with "M" were predicted as having a greater than 50% chance of being a maser by at least one of the statistical classification techniques utilized by Manning+ (2016PASA...33...15M). Sources marked with "B" indicating the line width of methanol emission broader than that of simultaneously observed thermal emission. Note (4): The distance for each maser is primarily estimated from the Galactic model of Reid et al. (2014, J/ApJ/783/130) and marked with r_Dist=", with the exception of some sources as follows: P = parallax distance measurement; G = Distance from Green & McClure-Griffiths (2011MNRAS.417.2500G); D = Distance from Dunham et al. (2011, J/ApJ/741/110); S = Distance from Schlingman et al. (2011, J/ApJS/195/14); E = Distance from Ellsworth-Bowers et al. (2015, J/ApJ/799/29) R = Distance determined from association with star formation regions within spiral arms through the Baysian model of Reid+ (2016ApJ...823...77R). O = For those sources where the Baysian model identifies it is unlikely located in a spiral arm (probability <0.8), the distance is given by their referenced paper (Ref). Note (5): References as follows: 1 = Kalenskii et al. (1994A&AS..103..129K); 2 = Valtts et al. (1995, J/AZh/72/22); 3 = Valtts et al. (2000MNRAS.317..315V); 4 = Ellingsen (2005, J/MNRAS/359/1498); 5 = Kalenskii et al. (2006ARep...50..289K); 6 = Fontani et al. (2010A&A...517A..56F); 7 = Chen et al. (2011, J/ApJS/196/9); 8 = Chen et al. (2012, J/ApJS/200/5); 9 = Gan et al. (2013, J/ApJ/763/2); 10 = Chen et al. (2013, J/ApJS/206/9); * = This paper.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- ID [1055/7495] BGPS ID (1) 6 A1 --- f_ID Listed in Manning+ (2016PASA...33...15M) (2) 8- 9 I2 h RAh Hour of Right Ascension (J2000) 11- 12 I2 min RAm Minute of Right Ascension (J2000) 14- 17 F4.1 s RAs Second of Right Ascension (J2000) 19 A1 --- DE- Sign of the Declination (J2000) 20- 21 I2 deg DEd Degree of Declination (J2000) 23- 24 I2 arcmin DEm Arcmin of Declination (J2000) 26- 27 I2 arcsec DEs Arcsec of Declination (J2000) 29- 31 F3.1 Jy rms [0.4/2.7] The rms noise of target source
Note (1): The first 770 sources were observed in 2012-2015, the last 37 sources were observed in 2016. Note (2): Sources marked with "M" were predicted as having a greater than 50% chance of being a maser by at least one of the statistical classification techniques utilized by Manning et al. (2016PASA...33...15M).
Byte-by-byte Description of file: table[68].dat
Bytes Format Units Label Explanations
1- 4 I4 --- ID [1039/7502]? BGPS ID (1) 6- 11 F6.2 km/s Vlsr [-74/155] Peak local standard of rest velocity 13- 16 F4.2 km/s e_Vlsr [0/1.1] Uncertainty in Vlsr 18- 22 F5.2 km/s DV [0.4/17] Line FWHM 24- 27 F4.2 km/s e_DV [0.01/2] Uncertainty in DelV 29- 34 F6.1 Jy.km/s Sint [2/1570] Integrated flux density 36- 40 F5.1 Jy.km/s e_Sint [0.1/523] Uncertainty in Sint 42- 46 F5.1 Jy Peak [0.3/354] Peak flux density 48- 53 F6.1 Jy.km/s Stot [8/2021]? Total integrated flux density 55- 58 F4.1 Jy rms [0.5/7.1]? 1 sigma of the observations
Note (1): Which is organised by increasing BGPS ID.
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Sep-2017
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