Pith Number

pith:XMK4EJ4O

pith:2021:XMK4EJ4OCWPE5BI7W4UX6SFVNJ

not attested not anchored not stored refs pending

Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy

Akio K. Inoue, Kimihiko Nakajima, Masami Ouchi, Seiji Fujiimoto, Shinobu Ozaki, Takashi Kojima, Yoshiaki Ono, Yuki Isobe, Yuri Kashiwagi

arxiv:2110.05030 v1 · 2021-10-11 · 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{XMK4EJ4OCWPE5BI7W4UX6SFVNJ}

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	2026-07-05T03:32:22.923517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb15c2278e159e4e851fb7297f48b56a5dc3d8b7fe02b95b0ab701e57db51347

Aliases

arxiv: 2110.05030 · arxiv_version: 2110.05030v1 · doi: 10.48550/arxiv.2110.05030 · pith_short_12: XMK4EJ4OCWPE · pith_short_16: XMK4EJ4OCWPE5BI7 · pith_short_8: XMK4EJ4O

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/XMK4EJ4OCWPE5BI7W4UX6SFVNJ \
  | 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: bb15c2278e159e4e851fb7297f48b56a5dc3d8b7fe02b95b0ab701e57db51347

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9b36bd50c4147956419ae7244128a80bcfbc90ce399ac344c3ca6139fbe0d69",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-10-11T06:53:04Z",
    "title_canon_sha256": "b22dc7de8906b0d9b71c8fbd19d83363d2ab1669a83f08a5fbcab92f56eb9b62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.05030",
    "kind": "arxiv",
    "version": 1
  }
}