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CAS95 - Galactic methanol masers at 12 GHz

Short title: Caswell et al. (1995)
Authors: Caswell, J. L.Vaile, R. A.Ellingsen, S. P.Norris, R. P.
Journal: Monthly Notices of the Royal Astronomical Society, Volume 274, Issue 4, pp. 1126-1152.
Bibcode:

Target type: Known_Class_II,OH
Transitions: OH_1665,CH3OH_12(II)

Abstract
We have detected 12-GHz methanol maser emission from 131 of 238 6.6-GHz masers searched. The peak flux densities at 12 GHz range from 1200 to 0.4 Jy with a median value of 7Jy. Individual spectral features of the two transitions often coincide, although with a wide range of relative intensities, so that the detailed appearances of the 12- and 6.6-GHz spectra often differ considerably. Where an individual spot (or spectral feature) does mase at both transitions, the relative intensities can indicate the physical conditions in the spot. The 12-GHz features are typically several times weaker than their 6.6-GHz counterparts, but there are instances where they are stronger, and these most likely delineate spots of higher than average density. From many masers, in both transitions, at least a quarter of the features show significant intensity variations on a time-scale of several months. Although the quiescent features are probably saturated, some of the more variable features, especially those at 12 GHz, may not be saturated.

Abstract

We have detected 12-GHz methanol maser emission from 131 of 238 6.6-GHz masers searched. The peak flux densities at 12 GHz range from 1200 to 0.4 Jy with a median value of 7Jy. Individual spectral features of the two transitions often coincide, although with a wide range of relative intensities, so that the detailed appearances of the 12- and 6.6-GHz spectra often differ considerably. Where an individual spot (or spectral feature) does mase at both transitions, the relative intensities can indicate the physical conditions in the spot. The 12-GHz features are typically several times weaker than their 6.6-GHz counterparts, but there are instances where they are stronger, and these most likely delineate spots of higher than average density. From many masers, in both transitions, at least a quarter of the features show significant intensity variations on a time-scale of several months. Although the quiescent features are probably saturated, some of the more variable features, especially those at 12 GHz, may not be saturated.

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Detection table from Caswell et al. (1995)

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DSS colored	2MASS colored	WISE colored
SDSS color	IRAC color I1,I2,I4	GLIMPSE 360
PACS color (70-160 um)	SPIRE color (250-500 um)	NVSS (1.4GHz)
ATLASGAL 870 um	ATLASGAL 870 um + Planck	Bolocam 1.1 mm
UKIDSS K Download UKIDSS K FITS	2MASS K Download 2MASS K FITS

select MAX(met2_data_all.ra_hms) as ra_hms,MAX(met2_data_all.dec_dms) as dec_dms,MAX(met2_data_all.source_name) as source_name,MAX(met2_data_all.ra) as ra,MAX(met2_data_all.dec) as dec,MAX(met2_data_all.l) as l,MAX(met2_data_all.b) as b,MAX(met2_data_all.grp) as grp,MAX(met2_data_all.other_name) as other_name,MAX(met2_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met2_data_all.line) as line,MAX(met2_data_all.vrange) as vrange,MAX(met2_data_all.vpeak) as vpeak,MAX(met2_data_all.peak) as peak,MAX(met2_data_all.fwhm) as fwhm,MAX(met2_data_all.int) as int,MAX(met2_data_all.rms) as rms,MAX(met2_data_all.units) as units,MAX(met2_data_all.units_rms) as units_rms,MAX(met2_data_all.date_txt) as date_txt,MAX(met2_data_all.telescope_ref) as telescope_ref,MAX(met2_data_all.telescope_conf) as telescope_conf,MAX(met2_data_all.v_step) as v_step,MAX(met2_data_all.beam) as beam,MAX(met2_data_all.beam_maj) as beam_maj,MAX(met2_data_all.beam_min) as beam_min,MAX(met2_data_all.beam_pa) as beam_pa,MAX(met2_data_all.ref) as ref,MAX(met2_data_all.list_ref) as list_ref,MAX(met2_data_all.ascii) as ascii,MAX(met2_data_all.url) as url,MAX(met2_data_all.image) as image,MAX(met2_data_all.image2) as image2,MAX(met2_data_all.image3) as image3,MAX(met2_data_all.descr) as descr,MAX(met2_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met2_data_all.dist) as dist,1 as dist_parallax,MAX(met2_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM met2_data_all  LEFT JOIN all_objects_withmet ON met2_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met2_data_all.line=transitions."Line"  WHERE ref ilike 'CAS95' AND detected=true AND hide=false GROUP BY ref

select met2_data_all.ra_hms,met2_data_all.dec_dms,met2_data_all.source_name,met2_data_all.ra,met2_data_all.dec,met2_data_all.l,met2_data_all.b,met2_data_all.grp,met2_data_all.other_name,met2_data_all.other_desc,met2_data_all.thermal,met2_data_all.line,met2_data_all.vrange,met2_data_all.vpeak,met2_data_all.peak,met2_data_all.fwhm,met2_data_all.int,met2_data_all.rms,met2_data_all.units,met2_data_all.units_rms,met2_data_all.date_txt,met2_data_all.telescope_ref,met2_data_all.telescope_conf,met2_data_all.v_step,met2_data_all.beam,met2_data_all.beam_maj,met2_data_all.beam_min,met2_data_all.beam_pa,met2_data_all.ref,met2_data_all.list_ref,met2_data_all.ascii,met2_data_all.url,met2_data_all.image,met2_data_all.image2,met2_data_all.image3,met2_data_all.descr,met2_data_all.id,met2_data_all.mjy_flag,met2_data_all.rms_mjy_flag,met2_data_all.dist,met2_data_all.dist_parallax,met2_data_all.date_txt,line_det,type,simbad_types_cat FROM met2_data_all   LEFT JOIN all_objects_withmet ON met2_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met2_data_all.line=transitions."Line"  WHERE ref ilike 'CAS95' AND detected=true AND hide=false ORDER BY detected DESC,id

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CAS95 - Galactic methanol masers at 12 GHz

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Detection table from Caswell et al. (1995)