Pith Number

pith:E3Z42YLF

pith:2021:E3Z42YLFTI74JMSLNFSJGD4MYW

not attested not anchored not stored refs pending

X-ray spectral features and classification of selected QSOs

Anatolii Tugay, Lidiia Zadorozhna, Nadiia Pulatova, Oleh Maluy

arxiv:2110.07373 v1 · 2021-10-14 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E3Z42YLFTI74JMSLNFSJGD4MYW}

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	2026-07-05T03:22:41.312479Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

26f3cd61659a3fc4b24b6964930f8cc59a3d844d027280a05488212f5c22e6bb

Aliases

arxiv: 2110.07373 · arxiv_version: 2110.07373v1 · doi: 10.48550/arxiv.2110.07373 · pith_short_12: E3Z42YLFTI74 · pith_short_16: E3Z42YLFTI74JMSL · pith_short_8: E3Z42YLF

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/E3Z42YLFTI74JMSLNFSJGD4MYW \
  | 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: 26f3cd61659a3fc4b24b6964930f8cc59a3d844d027280a05488212f5c22e6bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cbea063a1b50f338f3ce61d6039f3d9e93aae80258673a91bd7810b42682ee03",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-10-14T14:05:03Z",
    "title_canon_sha256": "66b218cb16fa8f88ee4f22499b38928566436fba11bb0536142df5bb691b2e3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.07373",
    "kind": "arxiv",
    "version": 1
  }
}