Pith Number

pith:H7JHDW4C

pith:2011:H7JHDW4C6BKMMKOAQRXKVMGV5K

not attested not anchored not stored refs pending

The Star Formation History of M32

2), (2) Department of Astronomy, (3) NOAO - National Optical Astronomy Observatory, (4) IAC - Instituto de Astrof\'isica de Canarias, (5) OCIW - Observatories of the Carnegie Institution of Washington, (6) Spitzer Science Center), Alan Dressler (5), Antonela Monachesi (1, Carl Grillmair (6), Kenneth J. Mighell (3) ((1) Kapteyn Astronomical Institute, Scott C. Trager (1), Sebasti\'an L. Hidalgo (4), Tod R. Lauer (3), University of Groningen, University of Michigan, Wendy Freedman (5)

arxiv:1111.3977 v1 · 2011-11-16 · astro-ph.CO · 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{H7JHDW4C6BKMMKOAQRXKVMGV5K}

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	2026-05-18T01:59:31.962219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3fd271db82f054c629c0846eaab0d5eabc67afdd9c166f2dd41756fce75c0e83

Aliases

arxiv: 1111.3977 · arxiv_version: 1111.3977v1 · doi: 10.48550/arxiv.1111.3977 · pith_short_12: H7JHDW4C6BKM · pith_short_16: H7JHDW4C6BKMMKOA · pith_short_8: H7JHDW4C

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/H7JHDW4C6BKMMKOAQRXKVMGV5K \
  | 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: 3fd271db82f054c629c0846eaab0d5eabc67afdd9c166f2dd41756fce75c0e83

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2980c8c56b4daea34d26614405e778b276e10669214edb1d2658140844b86ba",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-11-16T21:45:03Z",
    "title_canon_sha256": "7be12ea1d0e76ca2a434907f37cd0dfe21fe96b0776e9b2f744bae098345dc94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.3977",
    "kind": "arxiv",
    "version": 1
  }
}