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 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 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 2016PASA...33...15M) were
observed in 2016 June.
File Summary:
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FileName Lrecl Records Explanations
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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 133 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
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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
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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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 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)
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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 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 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 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 1994A&AS..103..129K);
2 = Valtts et al. (1995, J/AZh/72/22);
3 = Valtts et al. (2000MNRAS.317..315V 2000MNRAS.317..315V);
4 = Ellingsen (2005, J/MNRAS/359/1498);
5 = Kalenskii et al. (2006ARep...50..289K 2006ARep...50..289K);
6 = Fontani et al. (2010A&A...517A..56F 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.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [1055/7495] BGPS ID (1)
6- 6 A1 --- f_ID Listed in Manning+ (2016PASA...33...15M 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- 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
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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 2016PASA...33...15M).
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Byte-by-byte Description of file: table[68].dat
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Bytes Format Units Label Explanations
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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
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Note (1): Which is organised by increasing BGPS ID.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Sep-2017