Pith Number

pith:XGIRRAWC

pith:2013:XGIRRAWCM6SGOPDMIDLI5ZFSL2

not attested not anchored not stored refs pending

IDV Observations & Study of the Quasar 0917+624

Hugh D. Aller, Margo F. Aller, Quanwei Li, Thomas P. Krichbaum, Xiang Liu

arxiv:1304.1953 v1 · 2013-04-07 · astro-ph.HE · 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{XGIRRAWCM6SGOPDMIDLI5ZFSL2}

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	2026-05-18T03:26:31.826088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9911882c267a4673c6c40d68ee4b25ea13c8b85327f0020daacb3e3bd8cecf5

Aliases

arxiv: 1304.1953 · arxiv_version: 1304.1953v1 · doi: 10.48550/arxiv.1304.1953 · pith_short_12: XGIRRAWCM6SG · pith_short_16: XGIRRAWCM6SGOPDM · pith_short_8: XGIRRAWC

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/XGIRRAWCM6SGOPDMIDLI5ZFSL2 \
  | 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: b9911882c267a4673c6c40d68ee4b25ea13c8b85327f0020daacb3e3bd8cecf5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9efedd01fc1e94c29e30b178c495e0c7d46f325f3906956e6380c96d64e383e8",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-07T02:14:53Z",
    "title_canon_sha256": "5179a6ccce814e230811c89d981a8687688ac9a607bd1fbbe107285dcd91f70f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1953",
    "kind": "arxiv",
    "version": 1
  }
}