Pith Number

pith:D4GCL7R7

pith:2022:D4GCL7R7I3XU2SCBDI36HYA7MT

not attested not anchored not stored refs pending

Near-infrared evolution of the equatorial ring of SN 1987A

A. Ahola, B. Leibundgut, C. Fransson, J. Larsson, P. Lundqvist, S. Mattila, T. Kangas

arxiv:2301.00172 v2 · 2022-12-31 · astro-ph.SR · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D4GCL7R7I3XU2SCBDI36HYA7MT}

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	2026-07-05T06:32:24.366202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f0c25fe3f46ef4d48411a37e3e01f64fe58eebb79372e66321c87aadcd90930

Aliases

arxiv: 2301.00172 · arxiv_version: 2301.00172v2 · doi: 10.48550/arxiv.2301.00172 · pith_short_12: D4GCL7R7I3XU · pith_short_16: D4GCL7R7I3XU2SCB · pith_short_8: D4GCL7R7

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/D4GCL7R7I3XU2SCBDI36HYA7MT \
  | 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: 1f0c25fe3f46ef4d48411a37e3e01f64fe58eebb79372e66321c87aadcd90930

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e1b33029d8675f1f67ec500868b06f1db73ee016384da1190e3240391a6cf40",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2022-12-31T10:29:31Z",
    "title_canon_sha256": "a05e6f07b4ff39bc3c013bc89f4d581b3a6de231aa1e2d85ac89e4c8340dc3a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2301.00172",
    "kind": "arxiv",
    "version": 2
  }
}