Author Topic: SUPERNOVA OF THE DAY  (Read 18496 times)

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11dlg
« Reply #15 on: June 04, 2011, 12:38:39 pm »
A type IIb supernova.

ATel   http://www.astronomerstelegram.org/?read=3403

Wiki   http://en.wikipedia.org/wiki/Type_IIb_supernova#Type_IIb_supernovae

SDSS DR7  http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=0x08280fab40b60276

Discoverers: ElisabethB, robert gagliano, nilium, alphamoonbase, chrostek, jwirthig, DCarter, graham d, pppolly, Jose Campos, Dronak, HelmutU, Brandon Doyle, aethervox, Slime, bentemming, keith1, pollowarek, cbuenaventura, davkt, jyosyula

« Last Edit: July 01, 2011, 01:00:04 pm by robert gagliano »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11eie
« Reply #16 on: June 11, 2011, 12:54:24 pm »
A type Ia supernova 11 days before maximum brightness.

ATel             http://www.astronomerstelegram.org/?read=3423

SDSS DR8    http://skyserver.sdss3.org
/dr8/en/tools/explore/obj.asp?id=0x112d124280a6018e


Wiki             http://en.wikipedia.org/wiki/Supernova#Type_Ia

Discoverers: caro794, chrostek, nilium, archenar, robert gagliano, piotrdudkiewicz, Jose Campos, graham d, tastiger, citizennc, phil42, gev69, voyager1682002, ahiotis, watersoluble, mark moffatt, aethervox, buddyjesus, RocketLunatic, Rafael 2011

« Last Edit: July 01, 2011, 01:00:26 pm by robert gagliano »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11eon (2011dh)
« Reply #17 on: June 16, 2011, 09:55:15 pm »
A very bright mag 12.9 type IIb supernova in the Whirlpool Galaxy (M51)!

ATel    http://www.astronomerstelegram.org/?read=3398

           http://www.astronomerstelegram.org/?read=3399

           http://www.astronomerstelegram.org/?read=3400

           http://www.astronomerstelegram.org/?read=3401

           http://www.astronomerstelegram.org/?read=3402

           http://www.astronomerstelegram.org/?read=3405

           http://www.astronomerstelegram.org/?read=3406

           http://www.astronomerstelegram.org/?read=3411

           http://www.astronomerstelegram.org/?read=3413

           http://www.astronomerstelegram.org/?read=3414

           http://www.astronomerstelegram.org/?read=3420

           http://www.astronomerstelegram.org/?read=3428

           http://www.astronomerstelegram.org/?read=3431

           http://www.astronomerstelegram.org/?read=3432

           http://www.astronomerstelegram.org/?read=3433

           http://www.astronomerstelegram.org/?read=3435

APOD  http://apod.nasa.gov/apod/ap110605.html

           http://apod.nasa.gov/apod/ap110611.html

Wiki     http://en.wikipedia.org/wiki/Whirlpool_Galaxy

arXiv    http://adsabs.harvard.edu/abs/2011arXiv1106.3551A

           http://adsabs.harvard.edu/abs/2011arXiv1106.2897V

Discoverers: nilium, Jonathan Fall, icebox531, chrostek, ihguthrie, alphamoonbase, robert gagliano, andsul, nico148, ETZ, randi, Jose Campos, CKZoo, caro794, roknrn

« Last Edit: July 16, 2011, 11:29:59 pm by robert gagliano »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11foq
« Reply #18 on: June 20, 2011, 01:48:15 pm »
A type Ia supernova at maximum brightness.

ATel             http://www.astronomerstelegram.org/?read=3442

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237662302987944642&spec=0

Wiki             http://en.wikipedia.org/wiki/Supernova#Type_Ia

Discoverers: nilium, voyager1682002, robert gagliano, FilipWiniarski1212, graham d, marianaenlasrocas, ElisabethB, anaclaudia, Jose Campos, btumpak, adamc32, monikasiewierska, bobjoefred, ptaszyn25, x303, caro794, jose m, starB84W9, herrlein, aethervox

« Last Edit: July 01, 2011, 01:01:10 pm by robert gagliano »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11 fuv
« Reply #19 on: June 30, 2011, 10:24:21 pm »
A type II supernova in NGC 7189.

ATel             http://www.astronomerstelegram.org/?read=3464

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237663479794565234&spec=418995055622121472

Wiki             http://en.wikipedia.org/wiki/Supernova#Type_II

Discoverers: caro794, bugg, robert gagliano, Anthony60022, tadaemdg, graham d, ahiotis, voyager1682002, aspringer, Diwata

« Last Edit: July 01, 2011, 01:05:06 am by robert gagliano »

robert gagliano

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« Last Edit: July 09, 2011, 04:58:55 pm by robert gagliano »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11gjh
« Reply #21 on: July 16, 2011, 06:37:56 pm »
A type Ia supernova 1 day before maximum brightness.

ATel             http://www.astronomerstelegram.org/?read=3492

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/quicklook/quickobj.asp?ra=16 32 13.82&dec=+38 39 20.3

Wiki             http://en.wikipedia.org/wiki/Type_Ia_supernova

Discoverers: robert gagliano, Jose Campos, chrostek, The Yeti, irokin, graham d, buddyjesus, ElisabethB, HelmutU, boris37, zoopee, ravish, WR, x303, elowitzr, leshiggins, Patrick60, voyager1682002, mboon4, bugg


robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11htj
« Reply #22 on: July 27, 2011, 12:26:44 pm »
A type II supernova.

ATel             http://www.astronomerstelegram.org/?read=3513

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/quicklook/quickobj.asp?ra=21 16 03.50&dec=+12 31 21.0

Wiki             http://en.wikipedia.org/wiki/Type_II_supernova

Discoverers: razvan66m, lpspieler, Eoprime, robert gagliano, WR, HelmutU, chrostek, djsimister, rob, elowitzr




robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11iid
« Reply #23 on: July 30, 2011, 11:45:12 am »
A type Ia supernova.

ATel              http://www.astronomerstelegram.org/?read=3521

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/quicklook/quickobj.asp?ra=17 48 07.75&dec=+57 45 58.1

Wiki             http://en.wikipedia.org/wiki/Type_Ia_supernova

Discoverers: WR, nilium, chrostek, HelmutU, buddyjesus, lpspieler, jostler74463, djsimister, RLH, mikeuk1, ElisabethB, robert gagliano, mikeg64, raphaelscheps, salakast, voyager1682002, mark moffatt, Wygod, Jose Campos, KJStec, graham d


robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 10ops
« Reply #24 on: August 14, 2011, 06:40:29 pm »
PTF10ops – a subluminous, normal-width lightcurve Type Ia supernova in the middle of nowhere. This is a huge discovery and possibly represents a new category of Type Ia supernova.

arXiv    http://arxiv.org/PS_cache/arxiv/pdf/1108/1108.0416v1.pdf

Discoverers: chrostek, ElisabethB, galaxirose, rphubbard, Alexandar Micic, volatile36, DIaspro, marek kaluzny, ciberjohn, graham d, John P Langridge

« Last Edit: August 14, 2011, 07:24:02 pm by robert gagliano »

graham d

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Re: SUPERNOVA OF THE DAY
« Reply #25 on: August 14, 2011, 11:13:16 pm »
The Maguire et al (2011) paper is a fascinating well written read with an upfront enigmatic title that ends- "..in the middle of nowhere". Titles rarely have such impact; this discovery deserves it.

As Robert points out it is a huge discovery. Robert's very useful guide to supernova mechanisms is on page 1. I tend to supplement this with a now dated bible by J Craig Wheeler's "Cosmic Catastrophies, Cambridge University Press (2000).

What makes the precursor "star" enigmatic is its age ( very old ~13Gyr) and environment. As mentioned it resides in a far distant locale 148kpc from a usual home. For reference were one to relate it to our own local galaxies it is ca. a quarter of the distance away from our Milky Way to the Andromeda galaxy which puts it way into the galactic halo; farther out than any former discovery of supernovae. The good or great news  :)  for galaxyzoo is that the equipment procedures make it highly likely we will discover more of these in the future- not so much for myself but for a new generation of youthful hunters yet to join. This needs a plug elsewhere, Alice.

Is the locale that of a mentioned dwarf galaxy? A low surface brightness galaxy eg. such as Segue-1 that Jean mentions in the recent OTD has a huge dark matter/normal matter abundance that has increased reportedly ca. 5 fold over the last 3 years from a previous ratio of ca. 1000/1 reported by Sean Carrol. Could enough DM accumulate to contribute massively to  a Dark Star ? Two years ago I wouldn't have given it much credence. Tonight or rather early morning is the time for a rethink.















« Last Edit: August 14, 2011, 11:19:39 pm by graham d »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11izq
« Reply #26 on: September 05, 2011, 03:44:37 pm »
A type Ib supernova!

ATel             http://www.astronomerstelegram.org/?read=3630

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/quicklook/quickobj.asp?ra=13 47 30.11&dec=+40 04 32.5

Wiki             http://en.wikipedia.org/wiki/Type_Ib_supernova

Discoverers: chrostek, nilium, robert gagliano, voyager1682002, eltolako, ElisabethB, RLH, WR, toostellar, owlsley, HelmutU, laccos



« Last Edit: September 05, 2011, 04:46:38 pm by robert gagliano »

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 10guz
« Reply #27 on: October 06, 2011, 01:48:23 pm »
A super-Chandrasekhar type Ia supernova!

ATel             http://www.astronomerstelegram.org/?read=2600

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=0x112d1775207901e5

Wiki             http://en.wikipedia.org/wiki/SN_2003fg

                    http://en.wikipedia.org/wiki/Chandrasekhar_limit

Discoverers: PTF ID: 10guz (uploaded 2010-05-04 20:49:22 UTC) Grosz, thoryan10, mdk, parusa, erik_p, ussoccer, chairstar, JoCohen, nilium


robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF 11pdj
« Reply #28 on: November 07, 2011, 01:48:47 pm »
A type IIb Hypernova in UGC 12410!

2011hg (= PSN J23114884+3101004) (= PTF11pdj), CBET 2887 discovered 2011/10/22.36 by F. Ciabattari and E. Mazzoni (Italian Supernovae Search Project)
Found in UGC 12410 at R.A. = 23h11m48s.84, Decl. = +31°01'00".4
Located 19" west and 15" south of the center of UGC 12410 
Mag 17.2:10/30, Type IIb (References: CBET 2894 CBAT TOCP)

ATel             http://www.astronomerstelegram.org/?read=3739

                   http://www.astronomerstelegram.org/?read=3738

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237680327878771111

Wiki             http://en.wikipedia.org/wiki/Type_IIb_supernova#Type_IIb_supernovae

Discoverers: PTF ID: 11pdj (uploaded 2011-10-22 15:48:43 UTC) nilium, Jose Campos, graham d, robert gagliano, hpaakkanen, WR, TITAN1981, ElisabethB, chrostek, x303, ravish, bugminer



   

robert gagliano

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Re: SUPERNOVA OF THE DAY - PTF qgw (=2011ev)
« Reply #29 on: December 09, 2011, 04:49:34 pm »
A Type IIP Supernova.

ATel             http://www.astronomerstelegram.org/?read=3798

SDSS DR8    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237680262924992596

Wiki             

When the luminosity of a Type II supernova is plotted over a period of time, it shows a characteristic rise to a peak brightness followed by a decline. These light curves have an average decay rate of 0.008 magnitudes per day; much lower than the decay rate for Type Ia supernovae. Type II are sub-divided into two classes, depending on the shape of the light curve. The light curve for a Type II-L supernova shows a steady (linear) decline following the peak brightness. By contrast, the light curve of a Type II-P supernova has a distinctive flat stretch (called a plateau) during the decline; representing a period where the luminosity decays at a slower rate. The net luminosity decay rate is lower, at 0.0075 magnitudes per day for Type II-P, compared to 0.012 magnitudes per day for Type II-L.The difference in the shape of the light curves is believed to be caused, in the case of Type II-L supernovae, by the expulsion of most of the hydrogen envelope of the progenitor star. The plateau phase in Type II-P supernovae is due to a change in the opacity of the exterior layer. The shock wave ionizes the hydrogen in the outer envelope—stripping the electron from the hydrogen atom—resulting in a significant increase in the opacity. This prevents photons from the inner parts of the explosion from escaping. Once the hydrogen cools sufficiently to recombine, the outer layer becomes transparent.



Discoverers: PTF ID: 11qgw (uploaded 2011-11-03 18:24:41 UTC) x303, nilium, linus hoeller, robert gagliano, ElisabethB, hpaakkanen, bentemming, graham d, rob, WR, chrostek, PawelTluscik, mark moffatt, ravish, Mikyle Holt, Kelby, veggy2, Jose Campos



« Last Edit: December 10, 2011, 12:07:03 pm by robert gagliano »