Pith Number

pith:ORC5OIQ4

pith:2013:ORC5OIQ4N7WNXI4K5SVK7R3C5V

not attested not anchored not stored refs pending

The not-so-massive black hole in the microquasar GRS1915+105

D.Steeghs, J.E.McClintock, M.J.Reid, S.G.Parsons, S.Littlefair, V.S.Dhillon

arxiv:1304.1808 v1 · 2013-04-05 · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ORC5OIQ4N7WNXI4K5SVK7R3C5V}

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	2026-05-18T01:50:42.278852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7445d7221c6fecdba38aecaaafc762ed4132b94bb23a51c8e353080351db0ce2

Aliases

arxiv: 1304.1808 · arxiv_version: 1304.1808v1 · doi: 10.48550/arxiv.1304.1808 · pith_short_12: ORC5OIQ4N7WN · pith_short_16: ORC5OIQ4N7WNXI4K · pith_short_8: ORC5OIQ4

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/ORC5OIQ4N7WNXI4K5SVK7R3C5V \
  | 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: 7445d7221c6fecdba38aecaaafc762ed4132b94bb23a51c8e353080351db0ce2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "061620d1bbbbc1c8576ed46795c049a20283564f24a1766e03a4cf41dbd6ce80",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-05T20:00:05Z",
    "title_canon_sha256": "2c8a2a3a6f5fa4603e92d5bec31d78b0e103e94a6178ebd930298d926916cc97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1808",
    "kind": "arxiv",
    "version": 1
  }
}