Northern Sky Narrowband Survey, DR0.2: Hα and continuum images

Images presented here show the entire surveyed region in Hα (without continuum; mapped to red), blue continuum (including emissions of OIII and HII; mapped to green), and red continuum (without Hα but with some SII emissions; mapped to blue). Emission nebulae appear predominantly reddish, while reflection nebulae range from green to blue. Stars are partially subtracted to make the faint reflection nebulae visible.

A description of the survey and the data release can be found at page Northern Sky Narrowband Survey: DR0.2.

Click on the images below to load them in full resolution using a JavaScript viewer.

Overview image of DR0.1 of Northern Sky Narrowband Survey in H-alpha, blue continuum, and red continuum
Overview image showing a 212° stereographic projection of the entire surveyed region. This projection type was used because it preserves shapes. Maximum image resolution in the JavaScript viewer (click on the image) is 30″ at the center (δ=90°) and about 11″ at the boundary (δ=-16°).

Tile images

The tiles are arranged in four rows centered at declinations 76.125°, 50.375°, 24.625°, and -1.125°. The size of each tile is 31° × 31°, with an overlap of at least 5.3°. Click on the preview images below to load them in maximum resolution of 10″ using a JavaScript viewer. The angle α below the preview images describes the right ascension of the image center. (The declination angle is found in the heading above the images. The ICRS coordinate system is used.)

Declination δ=76.125°

Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=22:17 h
α=22:17 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=18:51 h
α=18:51 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=15:26 h
α=15:26 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=12:00 h
α=12:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=8:34 h
α=8:34 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=5:09 h
α=5:09 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=76.12 d, RA=1:43 h
α=1:43 h

Declination δ=50.375°

Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=23:00 h
α=23:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=21:00 h
α=21:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=19:00 h
α=19:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=17:00 h
α=17:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=15:00 h
α=15:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=13:00 h
α=13:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=11:00 h
α=11:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=9:00 h
α=9:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=7:00 h
α=7:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=5:00 h
α=5:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=3:00 h
α=3:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=50.38 d, RA=1:00 h
α=1:00 h

Declination δ=24.625°

Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=23:09 h
α=23:09 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=21:26 h
α=21:26 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=19:43 h
α=19:43 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=18:00 h
α=18:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=16:17 h
α=16:17 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=14:34 h
α=14:34 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=12:51 h
α=12:51 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=11:09 h
α=11:09 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=9:26 h
α=9:26 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=7:43 h
α=7:43 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=6:00 h
α=6:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=4:17 h
α=4:17 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=2:34 h
α=2:34 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=24.62 d, RA=0:51 h
α=0:51 h

Declination δ=-1.125°

Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=23:09 h
α=23:09 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=21:26 h
α=21:26 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=19:43 h
α=19:43 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=18:00 h
α=18:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=16:17 h
α=16:17 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=14:34 h
α=14:34 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=12:51 h
α=12:51 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=11:09 h
α=11:09 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=9:26 h
α=9:26 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=7:43 h
α=7:43 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=6:00 h
α=6:00 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=4:17 h
α=4:17 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=2:34 h
α=2:34 h
Northern Sky Narrowband Survey, DR0.2: H-alpha and continuum light; DEC=-1.12 d, RA=0:51 h
α=0:51 h

Monitor calibration

For optimal display, the monitor should be calibrated so that as many shades of the grayscale shown below are distinguishable. At least the 4% steps should be separated by every monitor. The 2% steps are visible on better monitors. To distinguish the 1% steps, a HDR monitor is required.

gray scale

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