Pith Number

pith:AA3A55SP

pith:2021:AA3A55SP6E5ORYSB5WGF2DZLBV

not attested not anchored not stored refs pending

Andromeda XXI -- a dwarf galaxy in a low density dark matter halo

Daniel R. Weisz, Erik J. Tollerud, Jorge Pe\~narrubia, Justin I. Read, Michelle L. M. Collins, Nicolas F. Martin, R. Michael Rich, Rodrigo A. Ibata, Scott C. Chapman

arxiv:2102.11890 v2 · 2021-02-23 · 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{AA3A55SP6E5ORYSB5WGF2DZLBV}

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	2026-07-05T02:57:15.914686Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

00360ef64ff13ae8e241ed8c5d0f2b0d4119987d4f35b2096eb8039aa794f26c

Aliases

arxiv: 2102.11890 · arxiv_version: 2102.11890v2 · doi: 10.48550/arxiv.2102.11890 · pith_short_12: AA3A55SP6E5O · pith_short_16: AA3A55SP6E5ORYSB · pith_short_8: AA3A55SP

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/AA3A55SP6E5ORYSB5WGF2DZLBV \
  | 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: 00360ef64ff13ae8e241ed8c5d0f2b0d4119987d4f35b2096eb8039aa794f26c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb302648e5af5b29d1f442f36b092960051e177b11bb1e169c406a106d7e9c73",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-02-23T19:03:23Z",
    "title_canon_sha256": "fc97d883ac8a8a7cc99faabc24208b2bc7f7a292494f69229e145a8f457084fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.11890",
    "kind": "arxiv",
    "version": 2
  }
}