Pith Number

pith:7P4XZQ2C

pith:2013:7P4XZQ2CDPMDGNPIKAMAJQCAIM

not attested not anchored not stored refs pending

X-ray source variability study of the M 31 central field using Chandra HRC-I

D. Hatzidimitriou, D. H. Hartmann, F. Haberl, F. Hofmann, M. Della Valle, M. Henze, R. Sturm, W. Pietsch

arxiv:1304.2643 v1 · 2013-04-09 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7P4XZQ2CDPMDGNPIKAMAJQCAIM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:50:41.044510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbf97cc3421bd83335e8501804c040433ec1d1b085eb78fa92aa29c691f4d0e9

Aliases

arxiv: 1304.2643 · arxiv_version: 1304.2643v1 · doi: 10.48550/arxiv.1304.2643 · pith_short_12: 7P4XZQ2CDPMD · pith_short_16: 7P4XZQ2CDPMDGNPI · pith_short_8: 7P4XZQ2C

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/7P4XZQ2CDPMDGNPIKAMAJQCAIM \
  | 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: fbf97cc3421bd83335e8501804c040433ec1d1b085eb78fa92aa29c691f4d0e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ad0b036faea25624a02cb4550051e622a9eb1f7e204af5f3d7ba48c725ebcec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-09T16:11:25Z",
    "title_canon_sha256": "3f544dc0a2f96d8be9411820cb38bda7fab6f64d714b7e1b1a5045480292e150"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2643",
    "kind": "arxiv",
    "version": 1
  }
}