| We present the results of an unbiased survey for 6.7 GHz methanol masers in the Galactic plane carried out using the 305 m Arecibo radio telescope. A total of 18.2 deg2 was surveyed with uniform sampling at 35.2deg<=l<=53.7deg, b<=0.41deg. The large collecting area of Arecibo and the sensitive C-Band High receiver allowed the survey to be complete at the level of 0.27 Jy, making this the most sensitive blind survey carried out to date. We detected a total of 86 sources, 48 of which are new detections. Most of the new detections have a peak flux density below 2 Jy. Many methanol masers are clustered, reflecting the formation of massive stars in clusters. eprintid: arXiv:astro-ph/0702147 |
Comments:
Notes as follows:
a = This source is identified by different (l, b) coordinates in Pestalozzi et al. (2005, Cat. J/A+A/432/737) due to incorrect coordinates being quoted for the IRAS source toward which Szymczak et al. (2000, Cat. J/A+AS/143/269) detected methanol maser emission. We relabel this source using our coordinates, which are more accurate for the methanol maser than the coordinates of the IRAS source.
b = This source was detected at the edge of a data cube and could not be detected in successive observations of the region. Hence, the actual coordinates of this source could be different from those quoted here.
c = The coordinates of this source detected in the Onsala Survey (which is not yet published in a refereed journal) and listed in Pestalozzi et al. (2005, Cat. J/A+A/432/737) are very different from our coordinates. We think that this could be due to a software problem, similar to the one giving rise to incorrect coordinates for IRAS sources published in Pestalozzi et al. (2005, Cat. J/A+A/432/737). Hence, we label this source with (l, b) determined from our coordinates.
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