Pith Number

pith:GZ2NNGRZ

pith:2015:GZ2NNGRZVJNIPK5Q35R5Z2VRS2

not attested not anchored not stored refs pending

The expanding light echoes from supernova 2014J in M82

Alejandro Clocchiatti, Dietrich Baade, Ferdinando Patat, Jason Spyromilio, J. Craig Wheeler, Justyn R. Maund, Lifan Wang, Misty Cracraft, Peter Brown, Peter Hoflich, William B Sparks, Xiaofeng Wang, Yi Yang

arxiv:1511.02495 v2 · 2015-11-08 · 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{GZ2NNGRZVJNIPK5Q35R5Z2VRS2}

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	2026-05-18T01:02:56.762434Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3674d69a39aa5a87abb0df63dceab1968da55006e67e872ab6e8abcc5a4776c7

Aliases

arxiv: 1511.02495 · arxiv_version: 1511.02495v2 · doi: 10.48550/arxiv.1511.02495 · pith_short_12: GZ2NNGRZVJNI · pith_short_16: GZ2NNGRZVJNIPK5Q · pith_short_8: GZ2NNGRZ

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/GZ2NNGRZVJNIPK5Q35R5Z2VRS2 \
  | 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: 3674d69a39aa5a87abb0df63dceab1968da55006e67e872ab6e8abcc5a4776c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73a9d0a2b2e31583e5c6ee6724446d0d58ac91583f990cc2b6927d22c2bb6f25",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-11-08T15:20:27Z",
    "title_canon_sha256": "b558d1608a6d2868e217d8a2b96ad9c981db8cab69fc569f3de249efa721b40f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.02495",
    "kind": "arxiv",
    "version": 2
  }
}