Pith Number

pith:PCKNW7XE

pith:2018:PCKNW7XEHTXXPO4VIQWTZUASSK

not attested not anchored not stored refs pending

A Deficit of Dark Matter from Jeans Modeling of the Ultra-diffuse Galaxy NGC 1052-DF2

Aaron J. Romanowsky, Asher Wasserman, Charlie Conroy, Jean Brodie, Pieter van Dokkum, Roberto Abraham, Shany Danieli, Yotam Cohen

arxiv:1807.07069 v2 · 2018-07-18 · 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{PCKNW7XEHTXXPO4VIQWTZUASSK}

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	2026-05-18T00:07:33.747950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7894db7ee43cef77bb95442d3cd0129292025d1fcffc1775a603a1a383f4ec23

Aliases

arxiv: 1807.07069 · arxiv_version: 1807.07069v2 · doi: 10.48550/arxiv.1807.07069 · pith_short_12: PCKNW7XEHTXX · pith_short_16: PCKNW7XEHTXXPO4V · pith_short_8: PCKNW7XE

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/PCKNW7XEHTXXPO4VIQWTZUASSK \
  | 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: 7894db7ee43cef77bb95442d3cd0129292025d1fcffc1775a603a1a383f4ec23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbef2d4c5023b7366d6ba8c6353c0761d07f08acc793b0bfac5e5d8b1bc2e4be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-18T18:00:00Z",
    "title_canon_sha256": "f57c43dec3b087997d4e17d3c964e73ec39f3fddf227b394f3f0f0efff4bd0f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07069",
    "kind": "arxiv",
    "version": 2
  }
}