Pith Number

pith:C75IRSJK

pith:2009:C75IRSJKDQFB2BGMQMX4L2YLDS

not attested not anchored not stored refs pending

Different types of ultraluminous X-ray sources in NGC 4631

Kajal Ghosh (NASA-MSFC), Roberto Soria (MSSL-UCL)

arxiv:0901.4302 v1 · 2009-01-27 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C75IRSJKDQFB2BGMQMX4L2YLDS}

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	2026-05-18T04:29:17.115918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17fa88c92a1c0a1d04cc832fc5eb0b1c98183767aaae38292971c0218ec5aad5

Aliases

arxiv: 0901.4302 · arxiv_version: 0901.4302v1 · doi: 10.48550/arxiv.0901.4302 · pith_short_12: C75IRSJKDQFB · pith_short_16: C75IRSJKDQFB2BGM · pith_short_8: C75IRSJK

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/C75IRSJKDQFB2BGMQMX4L2YLDS \
  | 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: 17fa88c92a1c0a1d04cc832fc5eb0b1c98183767aaae38292971c0218ec5aad5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3935b88519b2106a9403e114f83d2aa2631aea96b347a0dd10131d387a6a58e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-01-27T17:57:31Z",
    "title_canon_sha256": "e558d1bab8d3f1779359d3a9dcf413ffd146a4fb7a38be19a65a79b05a6ad1cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4302",
    "kind": "arxiv",
    "version": 1
  }
}