Pith Number

pith:XXVKW7QQ

pith:2011:XXVKW7QQMD3CU4UASBWQ3VSWXY

not attested not anchored not stored refs pending

The origin of variability of the intermediate-mass black-hole ULX system HLX-1 in ESO 243-49

D. Barret, G. Dubus, J.-P. Lasota, N. A. Webb, N. Gehrels, O. Godet, S. A. Farrell, T. Alexander

arxiv:1102.4336 v3 · 2011-02-21 · astro-ph.HE · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XXVKW7QQMD3CU4UASBWQ3VSWXY}

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	2026-05-18T02:03:06.833687Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bdeaab7e1060f62a7280906d0dd656be0d6b86d75ebee25f3dfd3ed989afb257

Aliases

arxiv: 1102.4336 · arxiv_version: 1102.4336v3 · doi: 10.48550/arxiv.1102.4336 · pith_short_12: XXVKW7QQMD3C · pith_short_16: XXVKW7QQMD3CU4UA · pith_short_8: XXVKW7QQ

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/XXVKW7QQMD3CU4UASBWQ3VSWXY \
  | 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: bdeaab7e1060f62a7280906d0dd656be0d6b86d75ebee25f3dfd3ed989afb257

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e66a3cd84b4de6bb2cbdd720a5accc04f5eb74a3073cb1c4694378db5f9d4f2",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2011-02-21T21:00:04Z",
    "title_canon_sha256": "b9250241b53defab59d1b049b4b854e2dfbcbc02e3048b1c548fa8fa0176507b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.4336",
    "kind": "arxiv",
    "version": 3
  }
}