The MDW Hα Sky Survey: Data Release 1
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arXiv
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| Format: | Preprint |
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2025
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| author | Aftab, Noor Xunhe Zhang Walker, Sean di Cicco, Dennis Mittelman, David R. Gupta, Sanya Saydjari, Andrew K. Putman, Mary Schiminovich, David |
| author_facet | Aftab, Noor Xunhe Zhang Walker, Sean di Cicco, Dennis Mittelman, David R. Gupta, Sanya Saydjari, Andrew K. Putman, Mary Schiminovich, David |
| contents | The Mittelman-di Cicco-Walker (MDW) H$α$ Sky Survey is an autonomously-operated all-sky narrow-band (3nm) H$α$ imaging survey. The survey was founded by amateur astronomers and the northern sky (Decl. $\geq$ 0$^\circ$) is presented here in its second stage of refinement for academic use. Each 3.6$\times$3.6 sq. deg MDW field has 12 20-minute individual exposures with a pixel scale of 3.6", a typical PSF of 6", and a stack point source depth of 16-17 magnitudes. The northern MDW Survey Data Release 1 (DR1) includes: calibrated and raw mean and individual images, star-removed mean fields, and point source catalogs for all images matched to Data Release 1 of the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS1) and the INT Galactic Plane Survey (IGAPS). Our initial study of H$α$ filament widths finds a typical FWHM of 30-45" in the Lyra region. The matched catalogs (with a median match distance of ~0.5"), combined with our distinctive narrow-band photometry, are used to identify H$α$ variable and excess sources. These initial studies highlight some of the many scientific uses of the MDW H$α$ survey. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_22900 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The MDW Hα Sky Survey: Data Release 1 Aftab, Noor Xunhe Zhang Walker, Sean di Cicco, Dennis Mittelman, David R. Gupta, Sanya Saydjari, Andrew K. Putman, Mary Schiminovich, David Instrumentation and Methods for Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics The Mittelman-di Cicco-Walker (MDW) H$α$ Sky Survey is an autonomously-operated all-sky narrow-band (3nm) H$α$ imaging survey. The survey was founded by amateur astronomers and the northern sky (Decl. $\geq$ 0$^\circ$) is presented here in its second stage of refinement for academic use. Each 3.6$\times$3.6 sq. deg MDW field has 12 20-minute individual exposures with a pixel scale of 3.6", a typical PSF of 6", and a stack point source depth of 16-17 magnitudes. The northern MDW Survey Data Release 1 (DR1) includes: calibrated and raw mean and individual images, star-removed mean fields, and point source catalogs for all images matched to Data Release 1 of the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS1) and the INT Galactic Plane Survey (IGAPS). Our initial study of H$α$ filament widths finds a typical FWHM of 30-45" in the Lyra region. The matched catalogs (with a median match distance of ~0.5"), combined with our distinctive narrow-band photometry, are used to identify H$α$ variable and excess sources. These initial studies highlight some of the many scientific uses of the MDW H$α$ survey. |
| title | The MDW Hα Sky Survey: Data Release 1 |
| topic | Instrumentation and Methods for Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2510.22900 |