Pith Number

pith:NEZ22QHE

pith:2002:NEZ22QHESVHQ7D43HLCCUEJVFF

not attested not anchored not stored refs pending

Chandra and ASCA Observations of the X-ray-brightest T-Tauri Stars in the Rho Ophiuchi Cloud

Katsuji Koyama, Kensuke Imanishi, Masahiro Tsujimoto

arxiv:astro-ph/0202287 v1 · 2002-02-15 · 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{NEZ22QHESVHQ7D43HLCCUEJVFF}

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	2026-07-04T16:29:24.661046Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6933ad40e4954f0f8f9b3ac42a1135296d70c71aa8aa93423d3f2545c5a12e54

Aliases

arxiv: astro-ph/0202287 · arxiv_version: astro-ph/0202287v1 · doi: 10.48550/arxiv.astro-ph/0202287 · pith_short_12: NEZ22QHESVHQ · pith_short_16: NEZ22QHESVHQ7D43 · pith_short_8: NEZ22QHE

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/NEZ22QHESVHQ7D43HLCCUEJVFF \
  | 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: 6933ad40e4954f0f8f9b3ac42a1135296d70c71aa8aa93423d3f2545c5a12e54

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d09da0e83b3ff77fe8ece0baef5c3f0cd65c3fa88c8c2612d8a15f7b09971b00",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-02-15T01:21:38Z",
    "title_canon_sha256": "5dbde24e35c23cceb50eea7064070d20db0b5f7e451b44359994a91f6480fa69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0202287",
    "kind": "arxiv",
    "version": 1
  }
}