Pith Number

pith:ZIS3QM4S

pith:2007:ZIS3QM4SOOI2KGST2LXTG3BTQL

not attested not anchored not stored refs pending

The Origin of the soft excess in AGN

Chris Done, Malgosia Sobolewska, Marek Gierlinski, Nick Schurch

arxiv:astro-ph/0703449 v1 · 2007-03-16 · 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{ZIS3QM4SOOI2KGST2LXTG3BTQL}

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.

Cited by

1 paper in Pith

An X-ray and optical spectral study of the changing-look narrow-line Seyfert 1 2MASX J0413-0050

Receipt and verification

First computed	2026-07-04T15:00:13.119779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca25b833927391a51a53d2ef336c3382e971ccb2231efeb0dd0b1ab175d13eb8

Aliases

arxiv: astro-ph/0703449 · arxiv_version: astro-ph/0703449v1 · doi: 10.48550/arxiv.astro-ph/0703449 · pith_short_12: ZIS3QM4SOOI2 · pith_short_16: ZIS3QM4SOOI2KGST · pith_short_8: ZIS3QM4S

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/ZIS3QM4SOOI2KGST2LXTG3BTQL \
  | 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: ca25b833927391a51a53d2ef336c3382e971ccb2231efeb0dd0b1ab175d13eb8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a341e946b7ce44a53edac4272c3c270c9ef4ba8b1eccb6284666bcfdbb1fadba",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-03-16T17:16:52Z",
    "title_canon_sha256": "9cd0647007cf5dbca255a06e3fdd00a1363b7d589373f45661bb8b70960934ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0703449",
    "kind": "arxiv",
    "version": 1
  }
}