Pith Number

pith:PLEN5G2U

pith:2026:PLEN5G2UHV4Q6LWACAKHRFAAAK

not attested not anchored not stored refs pending

Detectability of Polarized Gamma-ray Emission from Blazar Flares with COSI

Alberto Sciaccaluga, Andreas Zoglauer, Carolyn A. Kierans, Christopher M. Karwin, Daniel Kocevski, Dieter H. Hartmann, Garrett A. Latiolais, Haocheng Zhang, Ioannis Liodakis, Israel Martinez-Castellanos, John A. Tomsick, Jorge Otero-Santos, Lea Marcotulli, Marco Ajello, Michela Negro, Mohammad Ali Boroumand, Sara Capecchiacci, Savitri Gallego, Srinadh R. Bhavanam, Steven E. Boggs, Tiffany R. Lewis

COSI can detect MeV polarization from up to six blazar flares in two years.

arxiv:2605.01139 v2 · 2026-05-01 · astro-ph.HE

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\pithnumber{PLEN5G2UHV4Q6LWACAKHRFAAAK}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Under baseline background levels (1 counts/s), and assuming that blazar flare statistics in the MeV band are comparable to those observed at GeV energies, we find that COSI can realistically detect polarization in up to ~6 flares with MDP99<50% over its two-year prime mission depending on different spectral and flare identification assumptions, with only a few most powerful ones reaching MDP99<20%.

C2weakest assumption

assuming that blazar flare statistics in the MeV band are comparable to those observed at GeV energies

C3one line summary

COSI is projected to detect MeV polarization from up to about 6 blazar flares over its two-year mission, mostly flat-spectrum radio quasars, assuming GeV-like flare rates and baseline backgrounds.

Receipt and verification

First computed	2026-05-25T02:02:16.090530Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ac8de9b543d790f2ec01014789400028d6eda41b6743dd1fd924b3fd2455e0e

Aliases

arxiv: 2605.01139 · arxiv_version: 2605.01139v2 · doi: 10.48550/arxiv.2605.01139 · pith_short_12: PLEN5G2UHV4Q · pith_short_16: PLEN5G2UHV4Q6LWA · pith_short_8: PLEN5G2U

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PLEN5G2UHV4Q6LWACAKHRFAAAK \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7ac8de9b543d790f2ec01014789400028d6eda41b6743dd1fd924b3fd2455e0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd6cfa0eb89506430a05fc1f12032b868c1f40e44cc27ab687a330d2fe8b50e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-05-01T22:31:25Z",
    "title_canon_sha256": "35d3f10aa41437af4f91d1ffc716b27d2d16540289cc874f43c93596f9a58a70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.01139",
    "kind": "arxiv",
    "version": 2
  }
}