Pith Number

pith:SWJCC6YV

pith:2002:SWJCC6YVXEQRHXO2ZPCOIEW73F

not attested not anchored not stored refs pending

X-rays from the First Massive Black Holes

C. Vignali, D.M. Alexander, D.P. Schneider, F.E. Bauer, G.P. Garmire, G.T. Richards, S.F. Anderson, S. Kaspi, W.N. Brandt, X. Fan

arxiv:astro-ph/0212082 v2 · 2002-12-03 · 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{SWJCC6YVXEQRHXO2ZPCOIEW73F}

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	2026-07-04T14:12:29.049948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9592217b15b92113dddacbc4e412dfd9774a4d2bc38caa75c821f44fc755774d

Aliases

arxiv: astro-ph/0212082 · arxiv_version: astro-ph/0212082v2 · doi: 10.48550/arxiv.astro-ph/0212082 · pith_short_12: SWJCC6YVXEQR · pith_short_16: SWJCC6YVXEQRHXO2 · pith_short_8: SWJCC6YV

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/SWJCC6YVXEQRHXO2ZPCOIEW73F \
  | 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: 9592217b15b92113dddacbc4e412dfd9774a4d2bc38caa75c821f44fc755774d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b6ca95c9d59c7ebc49b75f57ac851c3eb5c76ee53064e7118b28393afb30a6f2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-12-03T21:05:37Z",
    "title_canon_sha256": "49ad093ce20136f0f786460a6af8d49d9089825ec2de186c0c2830aa70c229c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0212082",
    "kind": "arxiv",
    "version": 2
  }
}