Pith Number

pith:4IVTE43G

pith:2009:4IVTE43GKAPICVHJ2HSU3BKC2C

not attested not anchored not stored refs pending

4C02.27: a quasar with episodic activity?

(2) NCRA, 3), (3) ATNF, (4) IUCAA, Australia, C. Konar (4) ((1) Jagiellonian University, CSIRO, D.J. Saikia (2, India, India), Krakow, Marsfield, M. Jamrozy (1), Poland, Pune, TIFR

arxiv:0908.1508 v1 · 2009-08-11 · 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{4IVTE43GKAPICVHJ2HSU3BKC2C}

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	2026-05-18T02:12:35.614597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e22b327366501e8154e9d1e54d8542d0a1a3cbab6dad9fc3c468dcf961997559

Aliases

arxiv: 0908.1508 · arxiv_version: 0908.1508v1 · doi: 10.48550/arxiv.0908.1508 · pith_short_12: 4IVTE43GKAPI · pith_short_16: 4IVTE43GKAPICVHJ · pith_short_8: 4IVTE43G

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/4IVTE43GKAPICVHJ2HSU3BKC2C \
  | 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: e22b327366501e8154e9d1e54d8542d0a1a3cbab6dad9fc3c468dcf961997559

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d193c9516437b7eb23237e72695ddd2fd85d38362b4fe890c679a2089a15177a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-11T13:00:42Z",
    "title_canon_sha256": "d30891d3f7ca7334c3afd16ae74e8a7f93e4e01f58931d43d644a0bf7f135bb4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1508",
    "kind": "arxiv",
    "version": 1
  }
}