Pith Number

pith:M3Z4UJV2

pith:2020:M3Z4UJV27VEPOVATOV73W345IX

not attested not anchored not stored refs pending

Observations of Galactic and Extragalactic Novae

Luca Izzo, Massimo Della Valle

arxiv:2004.06540 v2 · 2020-04-14 · 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{M3Z4UJV27VEPOVATOV73W345IX}

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	2026-07-05T01:19:01.270609Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66f3ca26bafd48f75413757fbb6f9d45cefc1febde9a6a23ef5a392f6c690927

Aliases

arxiv: 2004.06540 · arxiv_version: 2004.06540v2 · doi: 10.48550/arxiv.2004.06540 · pith_short_12: M3Z4UJV27VEP · pith_short_16: M3Z4UJV27VEPOVAT · pith_short_8: M3Z4UJV2

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/M3Z4UJV27VEPOVATOV73W345IX \
  | 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: 66f3ca26bafd48f75413757fbb6f9d45cefc1febde9a6a23ef5a392f6c690927

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b1d281837edb9de3600cc65a935aa98e8a5f0ecb6c64a5353272bce6253b71d8",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-04-14T14:18:58Z",
    "title_canon_sha256": "0bc467e16ea80453936b9553c36bd38dab9c7dfff64ddaaaf16f4f30ccd86526"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.06540",
    "kind": "arxiv",
    "version": 2
  }
}