Paper: 2019MNRAS.487.3505M (acknowledgments)
ACKNOWLEDGEMENTS This paper uses observations made at the Cerro Tololo Inter-American Observatory (CTIO). We thank anonymous referees for comments that have helped us to improve the paper. This work was supported by NCN (Narodowe Centrum Nauki) grant No. 2016/21/B/ST9/01126. This research has made use of the VizieR catalogue access tool, CDS (Centre de Données astronomiquws de Strasbourg), Strasbourg, France. The original description of the VizieR service was published by Ochsenbein et al. ( 2000 ). The research has made use of the SIMBAD database, operated at CDS, Strasbourg, France (Wenger et al. 2000 ). This research has made use of ‘‘Aladin sky atlas'' developed at CDS, Strasbourg Observatory, France (Bonnarel et al. 2000 ; Boch Fernique 2014 ). This research has made use of the WEBDA (WEB version of he database known as Base Données Amas) data base, operated at the Department of Theoretical Physics and Astrophysics of the Masaryk University. This paper makes use of data obtained as part of the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS, www.iphas.org ) carried out at the Isaac Newton Telescope (INT). The INT is operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. All IPHAS data are processed by the Cambridge Astronomical Survey Unit, at the Institute of Astronomy in Cambridge. The bandmerged DR2 catalogue was assembled at the Centre for Astrophysics Research, University of Hertfordshire, supported by STFC (Science and Technology Facilities Council) grant ST/J001333/1. This work is based in part on data obtained as part of the UKIRT (United Kingdom Infrared Telescope) Infrared Deep Sky Survey. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This research has also made use of IRAF (Image Reduction and Analysis Facility). IRAF is distributed by the National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. This work has made use of data from the European Space Agency (ESA) mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. We are indebted to Prof. Andrzej Pigulski and Przemysław Mikołajczyk for his comments made upon reading the manuscript. We thank Ewa Niemczura, Stefan Meingast, and Ivanka Stateva who helped to carry out some additional observations which were, however, not included to the analysis.