Pith Number

pith:HLJ3FJBJ

pith:2013:HLJ3FJBJHTVLQJLO4DLBP7C7TD

not attested not anchored not stored refs pending

An X-ray view of quasars

K. P. Singh

arxiv:1310.0270 v3 · 2013-10-01 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HLJ3FJBJHTVLQJLO4DLBP7C7TD}

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

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	2026-05-18T03:11:23.645588Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ad3b2a4293ceab8256ee0d617fc5f98ce88cdc7b1865e43a886b7bb7543083e

Aliases

arxiv: 1310.0270 · arxiv_version: 1310.0270v3 · doi: 10.48550/arxiv.1310.0270 · pith_short_12: HLJ3FJBJHTVL · pith_short_16: HLJ3FJBJHTVLQJLO · pith_short_8: HLJ3FJBJ

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/HLJ3FJBJHTVLQJLO4DLBP7C7TD \
  | 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: 3ad3b2a4293ceab8256ee0d617fc5f98ce88cdc7b1865e43a886b7bb7543083e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6be57647874f5b8bcbbd1e9ce4d3b56748d5d21286b843a2621eefa23ee86557",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-10-01T12:41:27Z",
    "title_canon_sha256": "ef879925fb1db10a133b56b421a885a6073e8c88cb2998f6bda5fc61660dae6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.0270",
    "kind": "arxiv",
    "version": 3
  }
}