Pith Number

pith:Y2AAEBRL

pith:2011:Y2AAEBRLQTI6XSSHVWP47PQX3V

not attested not anchored not stored refs pending

The cluster population of the irregular galaxy NGC 4449 as seen by the Hubble Advanced Camera for Surveys

Alessandra Aloisi (STScI), Francesca Annibali (INAF-OABo), Monica Tosi (INAF-OABo), Roeland P. van der Marel (STScI)

arxiv:1108.0694 v2 · 2011-08-02 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y2AAEBRLQTI6XSSHVWP47PQX3V}

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	2026-05-18T02:01:03.921778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c68002062b84d1ebca47ad9fcfbe17dd6e38f370ae142dc44b96d0a6f4594eb5

Aliases

arxiv: 1108.0694 · arxiv_version: 1108.0694v2 · doi: 10.48550/arxiv.1108.0694 · pith_short_12: Y2AAEBRLQTI6 · pith_short_16: Y2AAEBRLQTI6XSSH · pith_short_8: Y2AAEBRL

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/Y2AAEBRLQTI6XSSHVWP47PQX3V \
  | 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: c68002062b84d1ebca47ad9fcfbe17dd6e38f370ae142dc44b96d0a6f4594eb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d134eb85d18fd6af0e7c40617172e76ac6f05e6a6a512dc76ac6bfb294b88236",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-08-02T21:27:54Z",
    "title_canon_sha256": "877e71c3916cb50a654d700d89f32cc9b9cb9af8a3f859384085e3bb48204b7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.0694",
    "kind": "arxiv",
    "version": 2
  }
}