Pith Number

pith:7G5I7G7J

pith:2010:7G5I7G7JEM34K4VSRRRBNKD6KD

not attested not anchored not stored refs pending

Revealing the First Stellar and Supermassive Black Holes to EXIST

A. Soderberg, G. Ghisellini, G. Tagliaferri, H. Moseley, J. Bloom, J. Grindlay, J. Hong, P. Coppi, P. Ubertini, R. Della Ceca, S. Barthelmy

arxiv:1002.4823 v2 · 2010-02-25 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7G5I7G7JEM34K4VSRRRBNKD6KD}

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	2026-05-18T02:08:56.751097Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9ba8f9be92337c572b28c6216a87e50c1d24d879718c0072ff68dabefb4b862

Aliases

arxiv: 1002.4823 · arxiv_version: 1002.4823v2 · doi: 10.48550/arxiv.1002.4823 · pith_short_12: 7G5I7G7JEM34 · pith_short_16: 7G5I7G7JEM34K4VS · pith_short_8: 7G5I7G7J

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/7G5I7G7JEM34K4VSRRRBNKD6KD \
  | 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: f9ba8f9be92337c572b28c6216a87e50c1d24d879718c0072ff68dabefb4b862

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3773a78e30e4b8e192309cabf935943e35bdb515bf0452c5524817a8fd1ec6f9",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-02-25T16:37:56Z",
    "title_canon_sha256": "0cec9bf0cacba1b292d6722149dba9fc25218ebe1afeba85b57f1c63f7737969"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.4823",
    "kind": "arxiv",
    "version": 2
  }
}