Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/VantagP2684tp.pdf Дата изменения: Wed May 2 20:27:01 2012 Дата индексирования: Mon Feb 4 16:18:48 2013 Кодировка: Поисковые слова: чоеыойе рмбоефщ

Proposal Identification No.:

P2684

Date Received:

2012-Oct-03 08:41:51

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Regular Pulsars 2.75 Hours 2.50 Hours

Pulsar wind nebula HESS J1943+213 and the case of the missing Supernova

Remnants
ABSTRACT:
HESS J1943+213 is very high energy gamma-ray point source close to the Galactic plan, found in 2011, and originally classified as an extreme BL Lacertae blazar. We imaged HESS J1943+21 using the European VLBI Network at 1.6 GHz, and found prominent extended emission around it that completely rules out a BL Lac ob ject. Furthermore, in HI spectral line data we found a shell-like feature with the radio/TeV point source near its center. This we interpret as a 105 -yr old supernova remnant (SNR) with a Pulsar Wind Nebula, powered by a central young pulsar. We appear to be looking at one of the oldest types of SNRs known, invisible except through its HI line emission. This may thus help to solve the long-standing problem of the "missing" Galactic SNRs. We here propose to unambiguously identify this structure as a supernova remnant, by detecting the pulsar that must power the pulsar wind nebula.

Name Joeri Van Leeuwen

Institution ASTRON

E-mail leeuwen@astron.nl

Phone +31626154552

Student no

Remote Observing Request

Observer will travel to AO X Remote Observing In Absentia (instructions to operator)

Instrument Setup
L-wide S-low

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
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Frequency Ranges Planned
1100-1700 This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST. This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

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