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J/A+A/325/255       5cm OH masers survey (Baudry+ 1997)

A survey of star-forming regions in the 5 cm lines of OH Baudry A., Desmurs J.-F., Wilson T.L., Cohen R.J. <Astron. Astrophys. 325, 255 (1997)> =1997A&A...325..255B (SIMBAD/NED BibCode)
ADC_Keywords: Masers ; Radio lines ; Polarization Keywords: masers - stars: formation - interstellar medium: HII regions; magnetic fields - radio lines: ISM Description: We have undertaken a comprehensive search for 5 cm OH masers in regions visible from Effelsberg with the 100-m telescope (i.e., those with declinations above -29o). Our sample is based on bright sources taken from the IRAS Point Source Catalog and/or from previous 18cm OH and H_ 2_O surveys. Among the 165 sources observed, 16 are new (15 exhibit emission and one source shows both absorption and emission). Two new absorption line sources have been tentatively detected. The general properties of the 5cm OH sources are presented and discussed. The 6035MHz line is more often detected than the 6031MHz line. Nevertheless, the latter line is frequently present, a fact that is not explained by present OH excitation models. Simple calculations tend to show that there are enough FIR photons to pump the 6035 and 6031MHz masers, and we found that the statistics of the ratio S_ radio/S IR_ at 18, 5 and 6cm suggest that the maser pumping efficiency decreases with increasing OH excitation. Variability on short (months) or long (years) time-scales is a common feature in many 5 cm OH sources. We also present observations of the 6 GHz satellite lines and report, besides W3(OH), on two certain and perhaps two newly detected weak sources. Some implications on the excitation of OH are briefly discussed. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 96 168 Observations of the 6031 and 6035 MHz transitions of OH table2 80 161 Line parameters of maser emission sources observed in 1995 July table3 102 41 Integrated flux densities of maser sources table4 73 19 Observations of the 6017 and 6049 MHz transitions of OH table6 49 116 The sense and percentage of circular polarization of maser features table7 45 28 Identification of possible Zeeman patterns tables.tex 80 1263 LaTeX version of the tables
Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 10 A10 --- IRAS IRAS source 12- 33 A22 --- Names Other names 35- 36 I2 h RAh Observed right ascension (1950) 38- 39 I2 min RAm Observed right ascension (1950) 41- 45 F5.2 s RAs Observed right ascension (1950) 47 A1 --- DE- Declination sign 48- 49 I2 deg DEd Observed declination (1950) 51- 52 I2 arcmin DEm Observed declination (1950) 54- 58 F5.2 arcsec DEs Observed declination (1950) 60- 63 I4 km/s Vlsrmin LSR Velocity range (lower value) 65- 68 I4 km/s Vlsrmax LSR Velocity range (upper value) 70 A1 --- l_Sen6031MHz(RCP) Limit flag on Sen6031MHz(RCP) (1) 71- 73 F3.2 Jy Sen6031MHz(RCP) ? Sensitivity at 6031MHz, RCP 74- 75 A2 --- n_Sen6031MHz(RCP) Note on Sen6031MHz(RCP) (2) 76 A1 --- l_Sen6031MHz(LCP) Limit flag on Sen6031MHz(LCP) (1) 77- 79 F3.2 Jy Sen6031MHz(LCP) ? Sensitivity at 6031MHz, LCP 80 A1 --- n_Sen6031MHz(LCP) Note on Sen6031MHz(LCP) (2) 82 A1 --- l_Sen6035MHz(RCP) Limit flag on Sen6035MHz(RCP) (1) 83- 85 F3.2 Jy Sen6035MHz(RCP) ? Sensitivity at 6035MHz, RCP 86- 88 A3 --- n_Sen6035MHz(RCP) Note on Sen6035MHz(RCP) (2) 90 A1 --- l_Sen6035MHz(LCP) Limit flag on Sen6035MHz(LCP) (1) 91- 93 F3.2 Jy Sen6035MHz(LCP) ? Sensitivity at 6035MHz, LCP 94- 96 A3 --- n_Sen6035MHz(LCP) Note on Sen6035MHz(LCP) (2)
Note (1): The upper limits correspond to 3σ Note (2): E = Emission (see details in Tables 2 and 3) A = Absorption (see details in Table 5)
Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 10 A10 --- Source IRAS source name 12- 20 A9 --- Name Other name 22 A1 --- n_Line6031MHz [RL] R: Right, L: left 23- 24 I2 --- Line6031MHz ? Line identification number at 6031MHz 25 A1 --- nLine6031MHz [*] Note (1) 27- 32 F6.2 km/s V6031MHz ? Velocity at 6031MHz 33 A1 --- u_V6031MHz [?] Uncertainty flag on V6031MHz 34- 37 F4.1 Jy Sp6031MHz ? Peak flux density at 6031MHz 38 A1 --- u_Sp6031MHz [?] Uncertainty flag on Sp6031MHz 40- 43 F4.2 km/s LW6031MHz ? Linewidth at 6031MHz 44 A1 --- u_LW6031MHz [?] Uncertainty flag on LW6031MHz 46 A1 --- n_Line6035MHz [RL] R: Right, L: left 47- 48 I2 --- Line6035MHz ? Line identification number at 6035MHz 49 A1 --- nLine6035MHz [*] Note (1) 51- 56 F6.2 km/s V6035MHz ? Velocity at 6035MHz 58- 63 F6.2 Jy Sp6035MHz ? Peak flux density at 6035MHz 64 A1 --- u_Sp6035MHz [?] Uncertainty flag on Sp6035MHz 66- 69 F4.2 km/s LW6035MHz ? Linewidth at 6035MHz 70 A1 --- u_LW6035MHz [?] Uncertainty flag on LW6035MHz
Note (1): *: feature detected in 1994 May only
Byte-by-byte Description of file: table3
Bytes Format Units Label Explanations
1- 10 A10 --- Source Source name 12- 20 A9 --- Names Other name 22- 27 F6.2 deg GLON Galactic longitude 28- 33 F6.2 deg GLAT Galactic latitude 35- 39 F5.2 Jy.km/s IS6031MHzr ? Integrated flux density at 6031MHz, right side 40 A1 --- u_IS6031MHzr [?] Uncertainty flag on IS6031MHzr 42- 46 F5.2 Jy.km/s IS6031MHzl ? Integrated flux density at 6031MHz, left side 47 A1 --- u_IS6031MHzl [?] Uncertainty flag on IS6031MHzl 49- 53 F5.2 Jy.km/s IS6035MHzr ? Integrated flux density at 6035MHz, right side 56- 60 F5.2 Jy.km/s IS6035MHzl ? Integrated flux density at 6035MHz, left side 61 A1 --- n_IS6035MHzl [*] Note (1) 62- 65 F4.1 kpc Dist ? Distance 69- 73 F5.2 kpc Dist2 ? Second value of distance when uncertainty (2) 74 A1 --- n_Dist2 [)] Note on Dist2 (3) 75- 79 F5.1 Jy.kpc2.km/s L6031MHz ? Luminosity at 6031MHz 82- 85 F4.1 Jy.kpc2.km/s L6031MHz2 ? Second value of luminosity at 6031MHz when uncertainty (2) 87- 92 F6.2 Jy.kpc2.km/s L6035MHz ? Luminosity at 6035MHz 95- 99 F5.1 Jy.kpc2.km/s L6035MHz2 ? Second value of luminosity at 6035MHz when uncertainty (2) 100 A1 --- n_L6035MHz2 [)] Note on L6035MHz2 (3) 102 A1 --- Per [JM] Period (4)
Note (1): The left circular 6035MHz spectrum was strongly corrupted Note (2): When there is an ambiguity in the computation of the kinematic distance for the observed source, there is two values for the distance, and then two values for each luminosity. Note (3): ): for the value less probable Note (4): J: spectra obtained in 1995 July M: spectra obtained in 1994 May
Byte-by-byte Description of file: table4
Bytes Format Units Label Explanations
1- 10 A10 --- IRAS IRAS source name 12- 29 A18 --- Names Other names 31- 33 I3 km/s Vlsrmin ? LSR velocity range (lower value) 35- 38 I4 km/s Vlsrmax ? LSR velocity range (upper value) 40 A1 --- l_S6017MHz Limit flag on S6017MHz 41- 44 F4.2 Jy S6017MHz ? 3 σ limit at 6017MHz 46- 47 A2 --- n_S6017MHz Note on S6017MHz (1) 49 A1 --- l_S6049MHz Limit flag on S6049MHz 50- 53 F4.2 Jy S6049MHz ? 3 σ limit at 6049MHz 54- 56 A3 --- n_S6049MHz Note on S6049MHz (1)
Note (1): A: Absorption; E: emission 1: Source observed in 1990 August; position and line parameters given in text 2: Line parameters given in text
Byte-by-byte Description of file: table6
Bytes Format Units Label Explanations
1- 10 A10 --- Source Source name 12 I1 --- Note ? Note (1) 14- 24 A11 --- Name Other name 26- 29 I4 MHz Line Line 31 A1 --- Side [RL] Side of the line 33- 38 F6.2 km/s Vlsr LSR velocity (2) 40- 42 A3 --- SensPol Sense of Polarization 44- 45 I2 % Pol Polarization 47- 48 I2 % e_Pol rms uncertainty on Pol 49 A1 --- n_Pol Note on Pol (3)
Note (1): Polarization derived from the 1995 July spectra except for 18592+0901, 19111+1048 and 21413+5442 whose polarization is derived from the 1994 May spectra Note (2): The velocity corresponds to the features identified in Table 2 Note (3): An asterisk means that one of the two spectra at a given velocity is negative or has been truncated; the corresponding 3σ flux density is then used in the single polarization scale
Byte-by-byte Description of file: table7
Bytes Format Units Label Explanations
1- 10 A10 --- Source Source name 12- 15 I4 MHz Line Line 17 I1 --- Nline1 First associated line number (1995 July data) (1) 19- 20 I2 --- Nline2 Second associated line number (1995 July data) (1) 21 A1 --- n_Nline [*] Note on the pair (2) 23- 28 F6.2 km/s Vel95 Center velocity for 1995 July observations 30- 33 F4.1 mG Field95 Field for 1995 July observations 35- 40 F6.2 km/s Vel94 ? Center velocity for 1994 May observations 42- 45 F4.1 mG Field94 ? Field for 1994 May observations
Note (1): Line identification numbers as listed in Table 2 Note (2): *: Another feature pairing although less likely is possible (see text)
Table5: Line parameters of absorption sources -------------------------------------------------------------------------------- Source Line LSR velocity Linewidth Peak flux density km/s km/s Jy -------------------------------------------------------------------------------- 02219+6152 (W3A) 6035 -39.71 2.86 -0.38 02219+6152 (W3A) 6031 -39.45 3.49 -0.41 18222-1317 (RAFGL 2147) 6035 +58.37 (0.30) -0.40 18592+0108 (W48) 6035 42.44 2.54 -0.19 18592+0108 (W48) 6031 42.44 2.54 -0.19 Note: For 18222-1317 and 18592+0108, see text for derivation of line parameters. Acknowledgements: Alain Baudry
(End) Patricia Bauer [CDS] 29-May-1997
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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