Boomerang SNR

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General information

The Boomerang SNR as seen by MAGIC [A&A 658, A60 (2022)]

• Name of the source: SNR 106.3+2.7
• Brief description of the source: Strong hadronic PeVatron candidate with TeV emission both from the head and the tail of the SNR
• Reference coordinated:

- MAGIC Tail: RA, Dec (ICRS): 36.72 deg, 60.84 deg

- MAGIC head: RA, Dec (ICRS): 337.13 deg, 61.10 deg

Proposals

• MAGIC Cycle XVII (GAL 346)
• LST Cycle I (GAL 07)

People involved

• Cornelia Arcaro
• Ali Baktash
• Marie-Sophie Carrasco
• Franca Cassol (PI)
• Yating Chai
• Heide Costantini
• Gabriel Emery
• Marine Pihet
• Takayuki Saito (co-PI)

Data available

There are three set of data :

- Mono-LST-1

- LST+MAGIC

- MAGIC

Monte Carlo Data

Monte Carlo data have been produced with successive productions in order to increase the node density. We asked also to have test nodes on the declination line. The figures show the present simulated nodes, to be found in

1- First production has been performed standardly with uniform training nodes on the declination line

2- Second production has been performed asking a node with with step cos(zenith)=0.04, for zenith angles > 60 deg (see here)

3- Third production has been performed in order to further increase the node density with step cos(zenith)=0.02, for zenith angles > 60 deg (see here)

- /fefs/aswg/data/mc/DL0/LSTProd2/TrainingDataset/Protons/dec_6166

- /fefs/aswg/data/mc/DL0/LSTProd2/TrainingDataset/GammaDiffuse/dec_6166

- /fefs/aswg/data/mc/DL0/LSTProd2/TestDataset

4- Fourth production is based on the concept of a very dense simulation line but each node having a low statistics (see here). The idea and method have been presented in several talks (see below)

- /fefs/aswg/data/mc/DL0/LSTProd2/TrainingDataset/Protons/dec_6166_high_density

- /fefs/aswg/data/mc/DL0/LSTProd2/TrainingDataset/GammaDiffuse/dec_6166_high_density

The new RFs and DL2 data are in:

- Model: /fefs/aswg/data/models/AllSky/20240519_v0.10.11_src4_dense_MC_line/dec_6166_high_density/

- DL2 test gammas : /fefs/aswg/data/mc/DL2/AllSky/20240519_v0.10.11_src4_dense_MC_line/TestingDataset/dec_6166_high_density/

We these new RFs we have reconstruct the old MC line in order to have protons and diffuse gamma as tests:

- Diffuse gamma : /fefs/aswg/workspace/marie-sophie.carrasco/boomerang/20240519_v0.10.11_src4_dense_MC_line/DL2/GammaDiffuse

- Protons : /fefs/aswg/workspace/marie-sophie.carrasco/boomerang/20240519_v0.10.11_src4_dense_MC_line/DL2/Protons

Analysis webpages

Mono-LST-1

-Data selection

-Data-MC comparison

-DL3 analysis

Stereo LST-1+MAGIC

-Data-selection

-Data-MC comparison

-DL3 analysis

MAGIC Only data

-Data-selection

-Data-MC comparison

-DL3 analysis

Joint high level analysis

- Coming

Main results

- Coming

Internal group meetings

- 2023

- 2024

Presentations in LST meetings

- 22-07-2022: Pevatron candidate G106.3+2.7 LZA (very) preliminary study (F. Cassol, LST GAL meeting)

- 18-10-2022: Pevatron Candidate G106.3+2.7 LZA F. Cassol, LST General Meeting Barcellona)

- 12-12-2022: Boomerang Very Large Zenith Angle proposal (F. Cassol, LST GAL meeting)

- 21-02-2023: About Boomerang campaign mono-LST-1 + stereo with MAGIC (F. Cassol, LST GAL meeting)

- 27-03-2023: Random Forest optimization for LZA observations (M. Carrasco, LST analysis meeting)

- 19-06-2023: Update on the Boomerang SNR (F. Cassol, LST General Meeting Munich)

- 09-10-2023: New MC production with “nearly” continuous pointing (G. Emery, LST analysis meeting)

- 09-11-2023: Updates on the Boomerang SNR observations with LST (M. Carrasco, LST General Meeting online)

- 04-12-2023: Sky map using a ring background method (G. Emery, LST analysis meeting)

- 25-04-2024: Updates on Boomerang (F. Cassol, LST GAL meeting)

- 21-05-2024: Update of the Boomerang PeVatron project (G. Emery, LST General Meeting Prague)

External presentations

- 15-01-2024: Science with LST : the puzzling case of the Boomerang SNR (F. Cassol, 1st VHEGAM meeting)

- 16-04-2024: Study of the PeVatron candidate SNR G106.3+2.7 observed at Large Zenith Angle with LST-1 and MAGIC (M.S. Carrasco, 2d CTAO Symposium)

Meetings on the Background Model estimation (GAL Center and Boomerang groups joint activity)

- 18-10-2023

- 02-11-2023

This activity is now continued inside a specific LST working group (see indico of LST analysis meeting)