Pith Number

pith:B2TKCUWF

pith:2020:B2TKCUWF2U2NGNMEP7UW3VOYB7

not attested not anchored not stored refs pending

SN 2013aa and SN 2017cbv: Two Sibling Type Ia Supernovae in the spiral galaxy NGC 5643

Abdo Campillay, Anthony L Piro, Carlos Contreras, C\'esar Rojas-Bravo, Charles D Kilpatrick, Chris Ashall, Christopher R Burns, Consuelo Gonz\'alez, David Sand, Eric Y Hsiao, Jaime Vargas-Gonz\'alez, Jorge Anais Vilchez, Joshua D Simon, Kevin Krisciunas, Llu\'is Galbany, Maximilian Stritzinger, M M Phillips, Nahir Mu\~noz-Elgueta, Natalie Ulloa, Nicholas B Suntzeff, Nidia Morrell, Peter Brown, Peter Hoeflich, Ricardo Flores, Robert P Kirshner, Ryan J Foley, S Holmbo, Syed Uddin, Wendy L Freedman

arxiv:2004.13069 v1 · 2020-04-27 · 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{B2TKCUWF2U2NGNMEP7UW3VOYB7}

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	2026-07-05T01:08:53.194320Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ea6a152c5d534d335847fe96dd5d80fe51480e1938c7f93f04ec7bfe6cebe99

Aliases

arxiv: 2004.13069 · arxiv_version: 2004.13069v1 · doi: 10.48550/arxiv.2004.13069 · pith_short_12: B2TKCUWF2U2N · pith_short_16: B2TKCUWF2U2NGNME · pith_short_8: B2TKCUWF

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/B2TKCUWF2U2NGNMEP7UW3VOYB7 \
  | 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: 0ea6a152c5d534d335847fe96dd5d80fe51480e1938c7f93f04ec7bfe6cebe99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc4ca07ce78723ead234b7da787f5d068da76759f2487b9f4e8da9fbe66ea2a9",
    "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": "2020-04-27T18:06:22Z",
    "title_canon_sha256": "733f4d0bdabba3d9d7f14797a9ffe78ead4d6e513520fc709852bbbfa60d07e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.13069",
    "kind": "arxiv",
    "version": 1
  }
}