Pith Number

pith:HYXYIIU2

pith:2021:HYXYIIU2ENECYL6WBZXFWG2T4F

not attested not anchored not stored refs pending

Tidal Distortions in NGC1052-DF2 and NGC1052-DF4: Independent Evidence for a Lack of Dark Matter

Allison Merritt, Ava Polzin, Colleen Gilhuly, Deborah Lokhorst, Imad Pasha, Jiaxuan Li, Michael A. Keim, Pieter van Dokkum, Qing Liu, Roberto Abraham, Seery Chen, Shany Danieli, Tim B. Miller, Zili Shen

arxiv:2109.09778 v3 · 2021-09-20 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HYXYIIU2ENECYL6WBZXFWG2T4F}

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	2026-07-05T04:52:26.246900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e2f84229a23482c2fd60e6e5b1b53e14ab348271aca4ebfe5dcfd6235058b5b

Aliases

arxiv: 2109.09778 · arxiv_version: 2109.09778v3 · doi: 10.48550/arxiv.2109.09778 · pith_short_12: HYXYIIU2ENEC · pith_short_16: HYXYIIU2ENECYL6W · pith_short_8: HYXYIIU2

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/HYXYIIU2ENECYL6WBZXFWG2T4F \
  | 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: 3e2f84229a23482c2fd60e6e5b1b53e14ab348271aca4ebfe5dcfd6235058b5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "751f34bbf96751b812b98510d6481b651b095650cf9b93b21a09d854130ccd5b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-09-20T18:14:23Z",
    "title_canon_sha256": "2406d3670a6414569c70fd68c8911048ff6f0ffa2eee472995dc6e6cda04cad4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.09778",
    "kind": "arxiv",
    "version": 3
  }
}