Pith Number

pith:4RRNTPNN

pith:2018:4RRNTPNNXGWWPDX4Q6NRYOYFO3

not attested not anchored not stored refs pending

Investigating the Unusual Spectroscopic Time-Evolution in SN 2012fr

A. L. Piro, C. Ashall, C. Burns, C. Cain, C. Contreras, E. Baron, E. Y. Hsiao, K. Krisciunas, M. D. Stritzinger, M. M. Phillips, N. B. Suntzeff, P. Hoeflich

arxiv:1810.01149 v2 · 2018-10-02 · astro-ph.SR · 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{4RRNTPNNXGWWPDX4Q6NRYOYFO3}

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	2026-05-17T23:57:39.799407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e462d9bdadb9ad678efc879b1c3b0576ec11d6facd4d03818ec3e78b6c14fb6f

Aliases

arxiv: 1810.01149 · arxiv_version: 1810.01149v2 · doi: 10.48550/arxiv.1810.01149 · pith_short_12: 4RRNTPNNXGWW · pith_short_16: 4RRNTPNNXGWWPDX4 · pith_short_8: 4RRNTPNN

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/4RRNTPNNXGWWPDX4Q6NRYOYFO3 \
  | 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: e462d9bdadb9ad678efc879b1c3b0576ec11d6facd4d03818ec3e78b6c14fb6f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b1cbcfc17a63b09e4d3df4e5fa5ac5a3301667e1f1aeedb3750145254f4bd03",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-10-02T10:02:22Z",
    "title_canon_sha256": "65c4a2102f11f90a492a349dd3d3d41fc2e805e2f85842192744181ad6b06f86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.01149",
    "kind": "arxiv",
    "version": 2
  }
}