Pith Number

pith:54QODXPO

pith:2007:54QODXPOGP2THEN5SKQS3GDDN4

not attested not anchored not stored refs pending

Gamma-ray probe of the QSO's obscured evolution

A. Iyudin (SINP, Garching, G. Di Cocco (IASF/IANF-Bologna, Germany), Italy), J. Greiner (MPE, Moscow, Moscow State University, Russia), S. Larsson (Stockholm University, Stockholm, Sweden)

arxiv:0704.2541 v1 · 2007-04-19 · astro-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{54QODXPOGP2THEN5SKQS3GDDN4}

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	2026-05-18T02:16:31.653292Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017

Aliases

arxiv: 0704.2541 · arxiv_version: 0704.2541v1 · doi: 10.48550/arxiv.0704.2541 · pith_short_12: 54QODXPOGP2T · pith_short_16: 54QODXPOGP2THEN5 · pith_short_8: 54QODXPO

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/54QODXPOGP2THEN5SKQS3GDDN4 \
  | 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: ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e6e7ae0e67be1793b4e063132e1b7c9236446059b8bd4f7c017af49b777fce01",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-04-19T14:21:14Z",
    "title_canon_sha256": "7b3ea1a318cd234ee7fd8036444683a0fc23904dfe2c64b5f62df1975966f9fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.2541",
    "kind": "arxiv",
    "version": 1
  }
}