Pith Number

pith:NX4Q7NG5

pith:2014:NX4Q7NG536RZ5CHN65VM44KJXF

not attested not anchored not stored refs pending

A remarkable recurrent nova in M31 - The X-ray observations

A.W. Shafter, I. Hachisu, J.-U. Ness, M.F. Bode, M. Henze, M.J. Darnley, M. Kato, S.C. Williams

arxiv:1401.2904 v2 · 2014-01-13 · 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{NX4Q7NG536RZ5CHN65VM44KJXF}

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	2026-05-18T01:45:26.113077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6df90fb4dddfa39e88edf76ace7149b96b0ff1475ddfb6f116427eabb31abca4

Aliases

arxiv: 1401.2904 · arxiv_version: 1401.2904v2 · doi: 10.48550/arxiv.1401.2904 · pith_short_12: NX4Q7NG536RZ · pith_short_16: NX4Q7NG536RZ5CHN · pith_short_8: NX4Q7NG5

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/NX4Q7NG536RZ5CHN65VM44KJXF \
  | 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: 6df90fb4dddfa39e88edf76ace7149b96b0ff1475ddfb6f116427eabb31abca4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7151b721fa3ecac990d8f6803799b49cafa33ca73e64bbf7e6a6b330699fe9b",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-01-13T16:29:36Z",
    "title_canon_sha256": "951984f8aee656b2c1d3aaec429e8a3e1f78a7d1726ce7be8a724ce08cec4387"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.2904",
    "kind": "arxiv",
    "version": 2
  }
}