Pith Number

pith:UTJOF455

pith:2013:UTJOF455OPI2DK2BGBDFIQW5W3

not attested not anchored not stored refs pending

The extragalactic background light from the measurements of the attenuation of high-energy gamma-ray spectrum

Asantha Cooray, Yan Gong

arxiv:1305.5249 v2 · 2013-05-22 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UTJOF455OPI2DK2BGBDFIQW5W3}

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	2026-05-18T01:49:47.617796Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4d2e2f3bd73d1a1ab4130465442ddb6c871f1090b174f16db38dbdc30433f0b

Aliases

arxiv: 1305.5249 · arxiv_version: 1305.5249v2 · doi: 10.48550/arxiv.1305.5249 · pith_short_12: UTJOF455OPI2 · pith_short_16: UTJOF455OPI2DK2B · pith_short_8: UTJOF455

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/UTJOF455OPI2DK2BGBDFIQW5W3 \
  | 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: a4d2e2f3bd73d1a1ab4130465442ddb6c871f1090b174f16db38dbdc30433f0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e7475846a2779e279d5aaa23034fb7cd6157a866492a5be27b8f91f5b3cbba3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-22T20:00:00Z",
    "title_canon_sha256": "a1bf241199115554733b9d07e37ba4c3d5a7a2f08a2f2aad088362b12ddc6bd8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5249",
    "kind": "arxiv",
    "version": 2
  }
}