Pith Number

pith:LF4A3724

pith:2003:LF4A37242AQP3AWHPCYW6MOHJE

not attested not anchored not stored refs pending

Chandra Observation of 3C 212: a New Look at the X-ray and UV Absorbers

A. Siemiginowska, F. Nicastro, M. Elvis, S. Mathur, S. S. Murray, T. L. Aldcroft

arxiv:astro-ph/0307397 v1 · 2003-07-22 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LF4A37242AQP3AWHPCYW6MOHJE}

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	2026-07-04T16:51:20.400671Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

59780dff5cd020fd82c778b16f31c7492caac573d24b2443146ad0a4bcd73d27

Aliases

arxiv: astro-ph/0307397 · arxiv_version: astro-ph/0307397v1 · doi: 10.48550/arxiv.astro-ph/0307397 · pith_short_12: LF4A37242AQP · pith_short_16: LF4A37242AQP3AWH · pith_short_8: LF4A3724

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/LF4A37242AQP3AWHPCYW6MOHJE \
  | 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: 59780dff5cd020fd82c778b16f31c7492caac573d24b2443146ad0a4bcd73d27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bbe608359f82302524f020ce0383c346a6b00b599b4ed54b3fcdaf274304355",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-07-22T21:17:31Z",
    "title_canon_sha256": "a395f04ea8c954f8c4c6ee39530312fef705c24262c6aa4967b76b472bba46f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0307397",
    "kind": "arxiv",
    "version": 1
  }
}