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The American Astronomical Society (AAS) awards the 2012 Bruno Rossi prize to Marco Tavani and the AGILE Team for the discovery of transient gamma-ray emission from the Crab Nebula

AGILE and Crab Nebula

(Credits: Massachusetts Institute of Technology)

The news in the Media

Excerpts from the press releases (in Italian):

Il più prestigioso e ambito riconoscimento internazionale nel campo dell'astrofisica delle alte energie, il premio Bruno Rossi (dal nome del padre della fisica dei raggi cosmici, fra i più importanti scienziati del XX secolo), è stato assegnato ad AGILE, frutto della collaborazione tra ASI, INAF, INFN, CIFS insieme al CNR e all'industria italiana.
"Con questo riconoscimento, AGILE, un satellite cosiddetto 'piccolo', ha confermato di poter competere con i grandi". Questa la reazione a caldo di Marco Tavani, principal investigator di AGILE.
"E' un po' l'immagine dell'Italia migliore, questo piccolo gioiello tutto rivestito di bianco", dice a proposito di AGILE Giovanni Bignami, presidente dell'INAF, commentando la notizia del premio. "Un condensato di altissima tecnologia ed eleganza al tempo stesso: realizzato con finanziamenti minimi e massimo ingegno, ha funzionato fin da subito in modo egregio".
"Dal 2007 a oggi - afferma Enrico Saggese, presidente dell'ASI - abbiamo ricevuto il Bruno Prize per Beppo Sax, Swift, per Fermi lo scorso anno e oggi per AGILE, premio dato al PI Marco Tavani e al suo team nel quale ASDC ricopre un ruolo cruciale. La missione AGILE rappresenta per l'ASI un importante programma scientifico di riferimento e in questi anni di vita operativa ha fornito spesso rilevanti e inattese sorprese, che sono certo continueranno grazie al prolungamento della sua vita operativa".
"La scoperta della variabilità della Crab - spiega Barbara Negri, responsabile dell'Esplorazione e Osservazione dell'Universo dell'ASI - è avvenuta anche grazie alla capacità di monitoraggio del cielo gamma e di allerta rapida del satellite AGILE, che aveva già visto un aumento del flusso gamma nel 2007, durante la fase di calibrazione del satellite, a pochi mesi del lancio".
"I dati di AGILE raccolti presso la base ASI di Malindi - aggiunge Paolo Giommi, responsabile dell'ASDC - vengono prontamente acquisiti e gestiti dall'ASDC, il centro dati multi-missione dell'ASI, ed analizzati quotidianamente dai ricercatori del team AGILE presso diversi istituti dell'INAF e presso l'ASDC stesso. Questo efficiente lavoro di squadra - conclude Giommi - ha portato alla scoperta della variabilità dell'emissione gamma dalla Nebulosa del Granchio, che rompe quello che per tutti gli scienziati era un 'tabù' e cioè che la sorgente stabile per antonomasia, usata per calibrare tutti i satelliti per astronomia delle alte energie, potesse variare all'improvviso".
Soddisfatto del riconoscimento anche il responsabile della missione per l'INFN, Guido Barbiellini, per il quale "AGILE è un magnifico esempio di collaborazione tra varie enti e agenzie di ricerca italiani. L'INFN, da parte sua, è orgoglioso di aver realizzato il tracker in silicio che si è rivelato l'elemento decisivo per determinare la direzione da cui provengono i raggi gamma osservati dal satellite. Ovviamente anche nel caso della Nebulosa del Granchio".

See also INAF news, ASI news, ASDC news

Interview with Marco Tavani, AGILE Principal Investigator, and Giovanni Bignami, President of the Italian Institute for Astrophysics (INAF)

SuperAGILE detects a Gamma-Ray Burst associated with a Supernova

GRB and SN

(Credits: foreground image - AGILE Team and ASDC, background image - Don Dixon )

On December 11, 2011 at 22:17:33 UT the SuperAGILE hard X-ray monitor aboard the Italian AGILE satellite localized a Gamma Ray Burst, GRB 111211A (GCN #12666 F. Lazzarotto et al.). The GRB 111211A is the first event detected by SuperAGILE associated with a Supernova (GCN #12802 A. de Ugarte Postigo et al.).While an average number of about 200 - 300 GRBs are localised each year in the X-ray band, less than twenty firm associations with Supernovae are established up to now. The SuperAGILE GRB 111211A is a rare occurrence of a burst which appears to be accompanied by a Supernova explosion, and gives the opportunity to further investigate the GRB-Supernova connection.
See also INAF news, ASDC news

AGILE resolves the mystery of the origin of cosmic rays

AGILE and W44

(Credits: AGILE Team, G. Castelletti, G. Dubner)

The AGILE discovery in the Media

AGILE has discovered a pattern of gamma-ray emission from the Supernova Remnant W44 that can be unanbiguosly attributed to accelerate protons smashing against surrounding gas. For many decades, a direct identification of sites in our galaxy where proton acceleration takes place has been elusive. The AGILE data resolves the problem of clearly identifying a source of energetic cosmic rays in our galaxy. The AGILE team reports these findings in a paper to be published by Astrophysical Journal Letters.
See also INAF news, ASI news, Italian Press Release, English Press Release

AGILE Cycle-3 Public Data now available

The proprietary period for the AGILE Cycle-3 Observation Blocks (OB) from OB 8600 to OB 10400 has currently expired. The data are public and available from the ASDC Multimission Archive (MMIA) webpage for the AGILE Mission.

New Crab Nebula super-flare on April 16, 2011

A very strong gamma-ray flare was detected by AGILE on April 16, 2011 from the Crab Nebula. The flux above 100 MeV reached the unprecedented value of
F = (2000 +/- 370) 10^{-8} ph/cm^2/sec.
The Crab was then twice as bright as the Vela Pulsar!

See ATel # 3286

AGILE's 20.000 orbits

On March 10, 2011 AGILE reached an important goal, it orbited the Earth 20.000 times since it was launched from the Sriharikota Indian base on April 23, 2007.

See
ASI News           Media INAF

AGILE discovery that the Crab Nebula is variable

AGILE and Crab Nebula

(Credits: AGILE Team, ASI, NASA)

"Agile 'prende' il Granchio"

The Crab Nebula is certainly one of the most famous astronomical objects. It is at the center of a bright supernova that exploded in 1054 and was recorded by Chinese astronomers. It encloses now at its very center one of the most powerful pulsars. The Crab has been considered for decades as one of the strongest persistent X-ray and gamma-ray source in the sky and was then used as a standard calibration source in astrophysics. Therefore, when between Sept. 19 and Sept.21, 2010 the AGILE team detected a strongly enhanced gamma-ray emission from the Crab Nebula region (ATel # 2855) it provoked a sort of shock in the community. Following the AGILE discovery and the confirmation by Fermi/LAT on the following day (Atel #2861), many telescopes (Swift, INTEGRAL, Hubble, Chandra) have then pointed and are still pointing at the Crab, gathering precious information for precisely identifying the phenomenon.
See also INAF news, ASI news, ASDC news

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Timetable of the Astronomer’s Telegram releases on the Crab Nebula flare in universal time, within 1 month after discovery on 22 September 2010. Corresponding telegram IDs are: 2855, 2856, 2858, 2861, 2866, 2867, 2868, 2872, 2879, 2882, 2889, 2893, 2903, 2921, 2967, 2968.

(Credits: From "Astronomy in the Time Domain", Bernardini E., Science 1201365 published online 6 January 2011, DOI: 10.1126/science.1201365. Reprint with permission from AAAS.)

Ron Cowen reports on ScienceNews about the variability
of the Crab Nebula at the 2010 Texas Symposium, in Heidelberg

"Crab Nebula’s Violent Outbursts Shock Astronomers"

The Newton magazine reports about the discovery by AGILE
of the variability of the Crab Nebula

"Occhio indiscreto"

AGILE discovery of emission up to 100 MeV
from Terrestrial Gamma-Ray Flashes (TGFs)

AGILE detection of TGFs

(Credits: APS Physics/Alan Stonebraker)

AGILE latest article on Terrestrial Gamma-Ray Flashes (TGFs)
reporting the surprising discovery of gamma-ray radiation
up to 100 MeV, published on Jan. 3, 2011 by Phys. Rev. Letters

"Terrestrial Gamma-Ray Flashes as Powerful Particle Accelerators"

Commentary by J. Dwyer on Physics (Jan. 3, 2011)
See Chance of thunder and gamma-ray flashes

See also Thunder storm radiation amazes physicists

AGILE detection in November 2010 of the
extraordinary gamma-ray flare from the blazar 3C 454.3

November, 2010 flare of blazar 3C 454.3

(Credit: AGILE Team)

"Crazy Diamond" fa record con AGILE

Starting on Nov. 17, 2010 (ATel # 3034) the AGILE satellite detected another extraordinary gamma-ray flare from the blazar 3C 454.3 that we are calling "Crazy Diamond" for the unpredictable variability of its emission. This gamma-ray flare is the most intense and prolonged one (ATel # 3043) ever detected, and transformed 3C 454.3 into the brightest gamma-ray source in the sky.
See also INAF news, ASI news