Pith Number

pith:HAHAKS7K

pith:2009:HAHAKS7KCHDH3Y4IHVZA5QSAP6

not attested not anchored not stored refs pending

A Neutron Star with a Carbon Atmosphere in the Cassiopeia A Supernova Remnant

Craig O. Heinke (U Alberta), Wynn C.G. Ho (U Southampton)

arxiv:0911.0672 v1 · 2009-11-04 · astro-ph.HE · 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{HAHAKS7KCHDH3Y4IHVZA5QSAP6}

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.

Cited by

1 paper in Pith

Pulse profile modelling of the 2024 outburst of the accreting millisecond pulsar SRGA J144459.2-604207

Receipt and verification

First computed	2026-05-18T04:26:54.175009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

380e054bea11c67de3883d720ec2407fafb301602321036a6b2b22ad2678c4ab

Aliases

arxiv: 0911.0672 · arxiv_version: 0911.0672v1 · doi: 10.48550/arxiv.0911.0672 · pith_short_12: HAHAKS7KCHDH · pith_short_16: HAHAKS7KCHDH3Y4I · pith_short_8: HAHAKS7K

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/HAHAKS7KCHDH3Y4IHVZA5QSAP6 \
  | 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: 380e054bea11c67de3883d720ec2407fafb301602321036a6b2b22ad2678c4ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8eccd92615a83b7532482dc9b2fc06da5e8172ae16ab0d65e69330cfbf9831a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-11-04T09:25:07Z",
    "title_canon_sha256": "4db6cdd069be158d71717bfd964d8e1fbb8fc78133ca7e0a8a0c7d59789b27a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.0672",
    "kind": "arxiv",
    "version": 1
  }
}