Pith Number

pith:NDWNIGP5

pith:2013:NDWNIGP56DF5N6XWZCZ4HBWI3R

not attested not anchored not stored refs pending

On the progenitor of the Type Ic SN 2013dk in the Antennae Galaxies

(2) INAF - Padova, (3) Queen's University Belfast, 4), (4) Royal Society Research Fellow, (5) Andres Bello University, (6) Texas Tech University, (7) LCOGT, 8) ((1) ICE (IEEC-CSIC), (8) University of California, Andrea Pastorello (2), David Sand (6), Giuliano Pignata (5), Justyn R. Maund (3, Katalin Tak\'ats (5), Morgan Fraser (3), Nancy Elias-Rosa (1), Santa Barbara), Stefano Benetti (2), Stefano Valenti (7, Stephen J. Smartt (3)

arxiv:1307.7755 v2 · 2013-07-29 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDWNIGP56DF5N6XWZCZ4HBWI3R}

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	2026-05-18T01:48:33.138230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68ecd419fdf0cbd6faf6c8b3c386c8dc4a99f8f9d1a8377162cbb518237869be

Aliases

arxiv: 1307.7755 · arxiv_version: 1307.7755v2 · doi: 10.48550/arxiv.1307.7755 · pith_short_12: NDWNIGP56DF5 · pith_short_16: NDWNIGP56DF5N6XW · pith_short_8: NDWNIGP5

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/NDWNIGP56DF5N6XWZCZ4HBWI3R \
  | 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: 68ecd419fdf0cbd6faf6c8b3c386c8dc4a99f8f9d1a8377162cbb518237869be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6da8edbe4464a76a64df0dc537c5e419fbfd3c65e2cd319d90aae77f4cdb6665",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-07-29T22:07:24Z",
    "title_canon_sha256": "9643d3b6bd4434d2f8a3c8697e8b146231c0e2f5751023032a9b8979a5ee8104"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.7755",
    "kind": "arxiv",
    "version": 2
  }
}