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Posts Tagged ‘Supernova’

Supernova ASASSN-15so in Galaxy NGC 3583

December 17, 2015 Leave a comment

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The bright spot at the centre of the spiral galaxy NGC 3583 in Ursa Major is the Type Ia supernova ASASSN-15so discovered by the All Sky Automated Survey for Super Novae (ASAS-SN) on 8/11/15. It is currently magnitude 13.7. The faint barred spiral galaxy above and slightly to the right of NGC 3583 is NGC 3577.

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Images taken 16/12/15 2.37am New Mexico time on iTelescope.Net T11. Luminance 5 x 300 sec. RA: 11h 14m 12.1s DEC: 48° 19′ 01″ (J2000)

 

Supernova PSN J07174570 in galaxy NGC 2357

Supernova PSN J07174570 was discovered by T. Noguchi on 2/5/15 in spiral galaxy NGC 2357 in the constellation Gemini. It is a Type Ia supernova and is currently at magnitude 14.2 brightening from the discovery magnitude of 15.7

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Image taken 7/5/15 9.21pm New Mexico time (UTC -6) on iTelescope T11 20″ Planewave CDK 508mm and FLI ProLine PL11002M camera. RA: 07h 17m 42.0s DEC: 23° 21′ 00″ (J2000). 5 x 180 sec luminance. Processed in Maxim DL5, DeepSkyStacker 3 and Adobe Photoshop CS2.

Supernova SN2015F in Galaxy NGC 2442 28-3-15

March 28, 2015 Leave a comment

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I fancied a change of scenery after all of the recent solar activity of various sorts and ventured south of the equator this time. As many of you who read this blog will know I often like to take images of supernovae which briefly appear in distant galaxies and the current brightest supernova is SN2015F. I reserved some time at the iTelescope Siding Spring observatory in Australia and used their half metre T31 Planewave telescope to capture this image.

Supernova 2015F was discovered on 9/3/15 by Berto Monard. It is a Type Ia currently at magnitude 13.3 and is located within the intermediate spiral galaxy NGC 2442, more commonly known as the Meathook Galaxy, in the constellation Volans (southern hemisphere). The Meathook Galaxy lies 50 million light years away and was first discovered by John Herschel.

Type Ia supernovae are fairly common in galaxies with old star populations and are really useful for determining distances between objects and even the age of the universe. Type Ia’s are the result of a white dwarf star exploding in a binary star system due to complex gravitational interactions between the white dwarf and a much larger companion star. The white dwarf grows to approximately 1.4 times the size of the Sun and then becomes unstable and explodes, destroying the star completely.

Imaged 28/3/15 10.28pm Australia time (11.28am UTC) on iTelescope T31 CDK 500mm Planewave with FLI-PL09000 camera. 3×300 sec, Bin 1, Luminance, RA: 07h 36m 18.0s DEC: -69° 31′ 59″ (J2000). Processed in MaxImDL5, DeepSkyStacker 3 and Photoshop CS2.

New Supernova SN 2014J in Galaxy M82

January 26, 2014 Leave a comment

Discovered on 21/1/14 by Steve J. Fossey when it was at magnitude 11.7 SN 2014J has continued to brighten to about magnitude 10.7. This supernova is a Type Ia-HV (high-velocity) with exploded gases escaping at about 12,400 miles per second. The progenitor star was a white dwarf made of carbon and oxygen, which have now fused into silicon during the explosion.

This is the closest and brightest supernova for the last 21 years and will be visible in 3″ and 4″ amateur telescopes.

Images taken 26/1/14 between 5.23 to 6.07 am New Mexico time on iTelescope T11 (black and white ) and T3 (colour) RA: 09h 55m 54.1s DEC: 69° 40′ 59″ (J2000)

Click on images to enlarge….

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Supernova SN 2013ct in galaxy NGC 428

August 13, 2013 Leave a comment

Supernova 2013ct is a Type Ia discovered by Stu Parker (BOSS – New Zealand) on 10/5/13 when it was at it’s peak magnitude of around 12.2.  It has now faded to approx mag 15.4

NGC 428 lies in the constellation Cetus approx. 37 million light years away. The galaxy has a distorted shape perhaps resulting from the collision of two galaxies.

Image taken 12/8/13 4.46 am local observatory time at Nerpio, Spain using remote iTelescope T07 (Planewave 17″ CDK, SBIG STL-11000M ABG). 4 x 300 secs Lum. Processed in Maxim DL5, Adobe Photoshop CS2, DeepSkyStacker 3.3.2

Click image to enlarge:

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AAVSO Light Curve:

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Supernova SN 2013dy in galaxy NGC 7250

August 6, 2013 Leave a comment

This Type Ia supernova was discovered on 10/7/13 by the Lick Observatory Supernova Search programme and Kuniaki Goto two weeks before it reached it’s peak brightness of around magnitude 12.7 on 25/7/13. The supernova is currently at magnitude 13.0

NGC 7250 (PGC 68535) lies some 55 million light years away and is a rather small object which is difficult to image. It was discovered by William Herschel on November 8th 1790 and is classed as a starburst galaxy.

Image taken 6/8/13 4.18 am local observatory time at Nerpio, Spain using remote iTelescope T07 (Planewave 17″ CDK, SBIG STL-11000M ABG). 4 x 300 secs Lum. Processed in Maxim DL5, Adobe Photoshop CS2, DeepSkyStacker 3.3.2  RA 22 18 17.7, Dec +40 33 47

Click image to enlarge:

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AAVSO Light Curve:

Light Curve

M51 Whirlpool Galaxy Supernova 2011dh

September 10, 2011 Leave a comment

As I mentioned in my last post supernova 2011dh is still visible in the Whirlpool Galaxy (M51) with the aid of a telescope. Magnitude is currently around 14.8 and fading so there’s still time to catch this one. I used the GRAS G07 17″ Planewave to capture an image tonight, but even though the moon is 116 degrees away to the south there was significant moonglow and this created a pretty horrible gradient across the image which could not be edited out using the usual gradient and light pollution removal tools. I therefore turned the image negative and increased the contrast to bring out some detail. The supernova is clearly visible at the marked location.

Here’s the current AAVSO light curve for this supernova…….