Cataclysm beneath the Heart : SNR G132.7+01.3 (HB3) + Altaïr of Atlas Astrophotographers + Optolong LRGB HA3nm OIII3nm
Cataclysm beneath the Heart : SNR G132.7+01.3 (HB3)
Credit: Altaïr of Atlas Astrophotographers: Louis Leroux, Adrien Soto, Nicolas Martino
Filters: Optolong LRGB HA3nm OIII3nm
Beneath the well-known Heart Nebula (IC1805) lies a much less popular place where a cataclysm occurred between 30,000 and 50,000 years ago! It was one of the most violent processes in the universe that took place in this region of the Cassiopeia constellation: a supernova.
►Equipment
Imaging Telescopes Or Lenses
Imaging Cameras
Mounts
Filters
Optolong Blue 2" · Optolong Green 2" · Optolong H-Alpha 3nm 2" · Optolong Luminance 2" · Optolong OIII 3nm 2" · Optolong Red 2"
Accessories
Astro-Gadget AstroPC Pro · Player One FHD-OAG MAX · WandererAstro WandererBox Pro V3 · WandererAstro WandererCover V4-EC
Software
Adobe Photoshop · Open PHD Guiding Project PHD2 · Pleiades Astrophoto PixInsight · Siril Team Siril · Stefan Berg Nighttime Imaging 'N' Astronomy (N.I.N.A. / NINA)
►Acquisition details
Frames:
Optolong Blue 2": 180×120″(6h)
Optolong Green 2": 180×120″(6h)
Optolong H-Alpha 3nm 2": 308×600″(51h 20′)
Optolong Luminance 2": 202×180″(10h 6′)
Optolong OIII 3nm 2": 339×600″(56h 30′)
Optolong Red 2": 180×120″(6h)
Integration: 135h 56′
RA center: 02h17m42s.81
DEC center: +62°48′53″.1
Pixel scale: 1.683 arcsec/pixel
Orientation: -0.074 degrees
Field radius: 2.225 degrees
WCS transformation: thin plate spline
More info:Open
Resolution: 6111x7297
File size: 20.3 MB
Data source: Own remote observatory
Remote source: HAWK Observatory
►Description
A supernova is a phenomenon that results from the explosion of a star at the end of its life, accompanied by a brief but fantastically large increase in its luminosity. Seen from Earth, a supernova therefore often appears as a new star, whereas in reality it corresponds to the disappearance of a star. The result is a massive ejection of energy and matter. Over the course of months, years and millennia, this vast quantity of matter makes its way away from the point that was once the star itself. This remnant of matter blown out of the dead star is called a supernova remnant (SNR).
SNR G132.7+ 1.3, also known as ‘HB3’, is one of the most extensive supernova remnants in our galaxy, measuring around 1.5°x2.0°. On the other hand, its luminosity is quite low, especially in the Oiii, so much so that we had to spend around 140 hours in total (LRVB-HOO) spread over 2 tiles of 70 hours each. This is our longest project to date with the AAA team. The first papers on the discovery of this X-ray signal date back to 1980.
Alongside the Heart Nebula is IC1795. Also known as the Fishhead Nebula, it is an emission nebula located around 6,000 light-years away and was discovered by the American astronomer Edward Barnard towards the end of 1890. This area contrasts sharply with the rest of the image because it is very bright and appeared almost overexposed when it was stacked.
In the top right corner is a small, round and bright object that catches the eye. This is the planetary nebula PK131+02.1, more commonly known as Abell 3 or SH2-189. This last name is the result of an error, as an PN does not normally belong in the Sharpless catalog. Its diameter is about 1'.
Closer to the center of the SNR is another object that caught our attention : the planetary nebula PN G132.8+02.0. Its diameter is around 2 times smaller than its neighbour above, with an apparent size of 0.5'.
