Pith Number

pith:ZRSAIDYW

pith:2009:ZRSAIDYWIFFHGVTQ37MSCPNTUT

not attested not anchored not stored refs pending

Resolving the Stellar Outskirts of M81: Evidence for a Faint, Extended Structural Component

A. M. N. Ferguson (Inst. for Astr., Cambridge), Edinburgh), M. Irwin (Inst. of Astr., M. K. Barker, N. Arimoto (Nat. Astr. Obs. of Japan), P. Jablonka (Geneva Obs.)

arxiv:0909.1430 v1 · 2009-09-08 · astro-ph.GA · 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{ZRSAIDYWIFFHGVTQ37MSCPNTUT}

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	2026-05-18T02:11:58.608853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc64040f16414a735670dfd9213db3a4d34c61256e787eee4378d05792726104

Aliases

arxiv: 0909.1430 · arxiv_version: 0909.1430v1 · doi: 10.48550/arxiv.0909.1430 · pith_short_12: ZRSAIDYWIFFH · pith_short_16: ZRSAIDYWIFFHGVTQ · pith_short_8: ZRSAIDYW

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/ZRSAIDYWIFFHGVTQ37MSCPNTUT \
  | 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: cc64040f16414a735670dfd9213db3a4d34c61256e787eee4378d05792726104

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81eedd14039e3514f80ae1dc6b8a00c2683048d7dc9852f5339529fac6304181",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-09-08T09:01:01Z",
    "title_canon_sha256": "57109ef0afed9529fe430a9dda5a5a25e0e3ebaa832227411cad97d97ba0ad55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1430",
    "kind": "arxiv",
    "version": 1
  }
}