Pith Number

pith:ZXW5YVQ2

pith:2013:ZXW5YVQ2GBT4AO25JZLP66GRVG

not attested not anchored not stored refs pending

Hydrogen and helium in the spectra of Type Ia supernovae

Bruno Leibundgut, Cecilia Kozma, Claes Fransson, E. Baron, Jason Spyromilio, Jesper Sollerman, Nick L. J. Cox, Peter Lundqvist, Seppo Mattila

arxiv:1307.4099 v1 · 2013-07-15 · astro-ph.HE · 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{ZXW5YVQ2GBT4AO25JZLP66GRVG}

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	2026-05-18T01:48:49.905077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdeddc561a3067c03b5d4e56ff78d1a9aea178c133210d6a6d21b27ed90bc8b4

Aliases

arxiv: 1307.4099 · arxiv_version: 1307.4099v1 · doi: 10.48550/arxiv.1307.4099 · pith_short_12: ZXW5YVQ2GBT4 · pith_short_16: ZXW5YVQ2GBT4AO25 · pith_short_8: ZXW5YVQ2

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/ZXW5YVQ2GBT4AO25JZLP66GRVG \
  | 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: cdeddc561a3067c03b5d4e56ff78d1a9aea178c133210d6a6d21b27ed90bc8b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "328251240b08714b0edc0c933cb200270c7b4481b3315b61b54918ae6e7e12e9",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-07-15T20:42:54Z",
    "title_canon_sha256": "cdf2899ca77ab43ce868798cb2c9ede1718f7d284fc8ff8c6727223a297a4a63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.4099",
    "kind": "arxiv",
    "version": 1
  }
}