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M65 (NGC 3623), Spiral Galaxy type Sa and M66 (NGC 3627), Spiral Galaxy type Sb, in Leo

LRGB combination - (Click for a larger view 1800 px x 1800 px) - scroll down for more images

Mouse over to see the place of SN 2013am

Sn2013am 

 

The supernova in M65 / SN 2013am with coordinates R.A. : 11h18m56.93s, Dec: +13°03'49.3" (more info below)

 

M65: LRGB combination - (Click for a larger view 1800 px x 1800 px)

CN 2013am 

 

M66: LRGB combination - (Click for a larger view 1800 px x 1800 px)

CN 2013am 

 

Details

M65 (NGC 3623), Spiral Galaxy type Sa and M66 (NGC 3627), Spiral Galaxy type Sb, in Leo

Discovered 1780 by Charles Messier.

M65 and M66 are a part from The Leo Triplet, a well known conspicuous grouping of galaxies (also known as the M66 Group). This is a small group of galaxies about 35 million light-years away in the constellation Leo. Halton Arp includes these galaxies in his entry number 317 of his Catalogue of Peculiar Galaxies, which denotes the Leo Triplett. This galaxy group consists of the spiral galaxies M65, the M66, and the NGC 3628 (not presented here). They are physically and dynamically related. The distance between M65 and M66 is only 160 000 light years.

M66 shows some disturbed features believed to be related to the remote encounter. It's spiral arms are deformed, and they seem to be distorted and displaced above the plane of the galaxy. M66 is considerably larger than its neighbor M65 and has a well developed but not well defined central bulge. In spiral arms can be seen much dust and a few pink nebulae, signs of star formation.

M65 looks like a very "normal" Sa type spiral and seems to have felt little influence. It has a prominent central lens and tightly wound spiral arms, and a vertical lane of dust in the eastern (left-side) edge of the galaxy. The luminous disk is dominated by a smooth old stellar population. Near the lane, some knots are visible, which, may be associated with star forming regions.

SN 2013am - Type II (References: ATEL 4910, CBAT TOCP): On 21.638 March 2013, M. Sugano, Kakogawa, Hyogo-ken, Japan reported the discovery of an apparent supernova in M65. The object received its official designation, SN 2013am (CBET 3440). The coordinates of SN 2013am are R.A. : 11h18m56.93s, Dec: +13°03'49.3". It is located 15".3 east and 103".2 south of the center of M65 (Discovery image).

North is up. The Horizontal FOV is about 35' (crop from original FOV). The image almost centered at RA: 11h 19m 43.72s Dec: +13°02'31.39"

  M65 M66
Right Ascension 11:18:55.78 (h:m:s) 11:20:15.07 (h:m:s)
Declination +13:05:32.3 (deg:m:s) +12:59:21.6 (deg:m:s)
Distance 35 000 (kly) 35 000 (kly)
Visual Brightness B=9.6, V=NA (mag) B=8.9, V=NA (mag)
Apparent Dimension 8.709' x 2.454′ (arc min) 8.317' x 4.168′ (arc min)

Optic(s): RC 12" with Astro-Physics corrector @ f/5
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik LRGB set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: From 6.02.2013 to 5.04.2013 (5 different nights)
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L = 140 min, R = 130 min, G = 130 min, B = 140 min, subs. 10 min, Bin 1, Total Exposure Time - 540 min (9 hours)

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided thanks to ASA DDM85 Premium mount
Processing:

PixInsight / PS

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All Contents copyright Velimir Popov unless otherwise noted.