Pith Number

pith:TD2LLLSU

pith:2012:TD2LLLSUIW22X7ITFKQRKDPRVW

not attested not anchored not stored refs pending

X-ray absorption variability in NGC 4507

Andrea Marinucci, Emanuele Nardini, Giorgio Matt, Guido Risaliti, Junfeng Wang, Martin Elvis, Stefano Bianchi, Valentina Braito

arxiv:1212.4151 v1 · 2012-12-17 · 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{TD2LLLSUIW22X7ITFKQRKDPRVW}

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	2026-05-18T01:52:31.330107Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

98f4b5ae5445b5abfd132aa1150df1ad818bb326f6891df66e3ed8dae5794c1a

Aliases

arxiv: 1212.4151 · arxiv_version: 1212.4151v1 · doi: 10.48550/arxiv.1212.4151 · pith_short_12: TD2LLLSUIW22 · pith_short_16: TD2LLLSUIW22X7IT · pith_short_8: TD2LLLSU

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/TD2LLLSUIW22X7ITFKQRKDPRVW \
  | 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: 98f4b5ae5445b5abfd132aa1150df1ad818bb326f6891df66e3ed8dae5794c1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42337b2910d7bcf34d8e33d8b9f898fc2ecedaca58df5c543473a137e28ac1e9",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-12-17T21:00:02Z",
    "title_canon_sha256": "31c8dc0afa23ab74a30cf3512f438e444f0ca1cb52d04209eedea08acbc0b144"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.4151",
    "kind": "arxiv",
    "version": 1
  }
}