Examples for pixel image extractionThe form, Get an Image, requires the user to input coordinates on the sky expressed in either equatorial co-ordinates of Right Ascension (RA) and Declination (Dec) or as Galactic latitude and longitude (l,b).
RA is the astronomical equivalent of terrestrial longitude, and ranges from 0 hours to 24 hours. RA is further subdivided into minutes and seconds, so that an RA of 07 43 18,1 equates to 07 hours, 43 minutes and 18.1 seconds.
Dec is the astronomical equivalent of terrestrial latitude, and ranges from -90 to + 90 degrees. Again Dec is further subdivided into minutes and seconds, so that a Dec of -34 45 14 equates to -34 degrees, 45 minutes and 14 seconds.
If the equatorial co-ordinate option is chosen enter the RA and Dec together in the position
box provided on the form i.e
There is an option to specify whether the equatorial co-ordinates are in equinox B1950 or J2000.
If the Galactic longitude and latitude co-ordinate option is chosen then enter the angular
values l,b together in the same position box in the form: i.e 249.3829 -5.5013.
The survey data is being released in stages of contiguous regions in the Southern Galactic Plane until the full Milky Way region is available. The current map of available fields can be found here
You should get images in the H-alpha and/or SR bands returned if you select according to the RA and DEC ranges shown on the survey field map (or their l,b equivalents).
Listed below are the coordinates of some interesting H-alpha sources that you might like to try extracting together with a suggested area size to extract. Note that the primary H-alpha band image is returned by default
Name RA and Dec Galactic l,b Size Description (equinox J2000) (decimal degrees) (arcmin) NGC2792 09 12 26.6 -42 25 41 265.7519 +4.1011 5 Planetary Nebula (PN) PHR0754-3444 07 54 55.0 -34 44 13 250.5709 -3.4301 2 New PN from H-alpha survey (Parker et al) G25 09 02 22.0 -48 41 35 269.1904 -1.4252 15 HII region from RCW (1960) catalogue GG22 08 28 46.2 -33 45 02 253.5900 +2.9560 15 Cometary Globule HH120/Re 2 08 09 32.6 -36 04 55 253.2914 -1.6125 10 Herbig-Haro object in the Gum Nebula region HH75 09 11 38.5 -45 42 28 268.0464 +1.7500 3 Herbig-haro object in Vela SNR263.4-03.0 08 34 12.0 -45 40 00 263.8257 -3.2410 30 Vela Supernova remnant
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