Pith Number

pith:2HX5USZU

pith:2012:2HX5USZUE7O73EN5KAAOEOGUIJ

not attested not anchored not stored refs pending

Are 3C249.1 and 3C334 restarted quasars?

Andrzej Marecki

arxiv:1209.1284 v2 · 2012-09-06 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2HX5USZUE7O73EN5KAAOEOGUIJ}

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	2026-05-18T03:45:20.786381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1efda4b3427ddfd91bd5000e238d4425b78141b0059a6c2468f7889e9b9a9b6

Aliases

arxiv: 1209.1284 · arxiv_version: 1209.1284v2 · doi: 10.48550/arxiv.1209.1284 · pith_short_12: 2HX5USZUE7O7 · pith_short_16: 2HX5USZUE7O73EN5 · pith_short_8: 2HX5USZU

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/2HX5USZUE7O73EN5KAAOEOGUIJ \
  | 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: d1efda4b3427ddfd91bd5000e238d4425b78141b0059a6c2468f7889e9b9a9b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf5e06e8c1378e726fd7042fb8a269e8f0a64671417eef6582a59a741852f38e",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-06T14:09:55Z",
    "title_canon_sha256": "da7ff7d1b97cbe68963238d5706e33742cb9646ece083c51762ec253deb5a58c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.1284",
    "kind": "arxiv",
    "version": 2
  }
}