Pith Number

pith:QQNMRDDH

pith:2019:QQNMRDDHRMDKRCEKLH2OP3EMSW

not attested not anchored not stored refs pending

Extreme high-energy peaked BL Lac objects and their TeV gamma-ray emission: are they a homogeneous population?

A. Franceschini, E. Prandini, L. Foffano, S. Paiano

arxiv:1907.13076 v1 · 2019-07-30 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQNMRDDHRMDKRCEKLH2OP3EMSW}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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.

Receipt and verification

First computed	2026-07-04T23:50:27.931805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

841ac88c678b06a8888a59f4e7ec8c9586ceff07568db673338b90d44a078de3

Aliases

arxiv: 1907.13076 · arxiv_version: 1907.13076v1 · doi: 10.48550/arxiv.1907.13076 · pith_short_12: QQNMRDDHRMDK · pith_short_16: QQNMRDDHRMDKRCEK · pith_short_8: QQNMRDDH

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QQNMRDDHRMDKRCEKLH2OP3EMSW \
  | 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: 841ac88c678b06a8888a59f4e7ec8c9586ceff07568db673338b90d44a078de3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11b31aa1f5d1d86009b7a1b873a833015676047ad2e68d929f94feb1fe61fbf9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-07-30T17:00:56Z",
    "title_canon_sha256": "938d1f5185fc74899d8ea5c9f45818558bee6ebfd4c5e87b74130d0c2050daad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.13076",
    "kind": "arxiv",
    "version": 1
  }
}