Pith Number

pith:KFCWKYNQ

pith:2026:KFCWKYNQWONCYC36XSNNSBW4DW

not attested not anchored not stored refs pending

A Planetary Nebula from a 5.7 $M_{\odot}$ Progenitor in a 90 Myr M31 Star Cluster

Bingqiu Chen, Haibo Yuan, Pinjian Chen, Shu Wang, Xiaodian Chen

arxiv:2606.04368 v1 · 2026-06-03 · astro-ph.SR · 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{KFCWKYNQWONCYC36XSNNSBW4DW}

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	2026-06-04T01:09:05.523623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6

Aliases

arxiv: 2606.04368 · arxiv_version: 2606.04368v1 · doi: 10.48550/arxiv.2606.04368 · pith_short_12: KFCWKYNQWONC · pith_short_16: KFCWKYNQWONCYC36 · pith_short_8: KFCWKYNQ

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/KFCWKYNQWONCYC36XSNNSBW4DW \
  | 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: 51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b095b979e79a9cc006b2a6c233c535d6647478b307fb901b4a06b1a68fab984",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-06-03T02:33:05Z",
    "title_canon_sha256": "b968c5c9113a28ddebedca2a3987cfaa900d347371d21e4ccb784b873e078842"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.04368",
    "kind": "arxiv",
    "version": 1
  }
}