Pith Number

pith:QGAGCYN2

pith:2012:QGAGCYN2DZY4F4LKBLJKWQKXFL

not attested not anchored not stored refs pending

Measuring the extragalactic background light from very high energy gamma-ray observations of blazars

Hai-Liang Huang (IHEP, Hong-Hao Zhang (SYSU), Qiang Yuan (IHEP), SYSU), Xiao-Jun Bi (IHEP)

arxiv:1212.5866 v1 · 2012-12-24 · astro-ph.HE · astro-ph.CO · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QGAGCYN2DZY4F4LKBLJKWQKXFL}

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	2026-05-18T03:37:51.152251Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81806161ba1e71c2f16a0ad2ab41572af89ba9a49df030f54f6091509ed6b49d

Aliases

arxiv: 1212.5866 · arxiv_version: 1212.5866v1 · doi: 10.48550/arxiv.1212.5866 · pith_short_12: QGAGCYN2DZY4 · pith_short_16: QGAGCYN2DZY4F4LK · pith_short_8: QGAGCYN2

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/QGAGCYN2DZY4F4LKBLJKWQKXFL \
  | 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: 81806161ba1e71c2f16a0ad2ab41572af89ba9a49df030f54f6091509ed6b49d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3c9a5caa5e0d6b054678734299b8e51a783548a418c006b2ab8586d465247c5",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-12-24T06:30:14Z",
    "title_canon_sha256": "5e661ae166dba8397d6f1a78b96edcf59e621dd6c136f15011abc88269bff032"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5866",
    "kind": "arxiv",
    "version": 1
  }
}