Pith Number

pith:VGYZUJX3

pith:2001:VGYZUJX3BUIYWMTAOM6PER5CMU

not attested not anchored not stored refs pending

Observations of Galaxies with Chandra

G. Fabbiano

arxiv:astro-ph/0109391 v1 · 2001-09-21 · 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{VGYZUJX3BUIYWMTAOM6PER5CMU}

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	2026-05-18T01:07:45.512486Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9b19a26fb0d118b3260733cf247a2650789f3902d374d0aabaca7e93dcc6877

Aliases

arxiv: astro-ph/0109391 · arxiv_version: astro-ph/0109391v1 · doi: 10.48550/arxiv.astro-ph/0109391 · pith_short_12: VGYZUJX3BUIY · pith_short_16: VGYZUJX3BUIYWMTA · pith_short_8: VGYZUJX3

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/VGYZUJX3BUIYWMTAOM6PER5CMU \
  | 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: a9b19a26fb0d118b3260733cf247a2650789f3902d374d0aabaca7e93dcc6877

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3d91603ff0f5d75bc0ca74cc78aae2997114a347d7c250fe3fb0a43a8c0a011",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-21T19:41:29Z",
    "title_canon_sha256": "082275fe0c3e163e4de143bc2d7689f81adf0864e024ae23d52b351158d28d82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109391",
    "kind": "arxiv",
    "version": 1
  }
}