Pith Number

pith:T4QKHO5I

pith:2002:T4QKHO5IGZST5ZNSGQASI6BR5I

not attested not anchored not stored refs pending

Chandra Observations and Optical Identification of Hard X-ray Sources Discovered with ASCA

2), (2) University of Tokyo, (3) Subaru Telescope NAOJ, (4) Kyoto University, (5) GSFC NASA, (6) NAOJ), Kouji Ohta (4), Masayuki Akiyama (3), Richard Mushotzky (5), Shin Watanabe (1, Tadayuki Takahashi (1, Toru Yamada (6) ((1) ISAS, Yoshihiro Ueda (1)

arxiv:astro-ph/0208232 v1 · 2002-08-12 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4QKHO5IGZST5ZNSGQASI6BR5I}

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	2026-05-18T01:40:42.363122Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f20a3bba836653ee5b23401247831ea12b881febb3870c45b727883f7f2305a

Aliases

arxiv: astro-ph/0208232 · arxiv_version: astro-ph/0208232v1 · doi: 10.48550/arxiv.astro-ph/0208232 · pith_short_12: T4QKHO5IGZST · pith_short_16: T4QKHO5IGZST5ZNS · pith_short_8: T4QKHO5I

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/T4QKHO5IGZST5ZNSGQASI6BR5I \
  | 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: 9f20a3bba836653ee5b23401247831ea12b881febb3870c45b727883f7f2305a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53761c1599d8bca92e7e216ebf0a77cf175d669b975d4f100d4ffcbee08afc6b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-08-12T13:28:46Z",
    "title_canon_sha256": "1c5df49da1d75de24b15f8047a1fe317f6c5b323ea9b49493d2bfa79229ff773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0208232",
    "kind": "arxiv",
    "version": 1
  }
}