Pith Number

pith:D4BURP53

pith:2007:D4BURP53NJSGE6QSVIQ7UQ2HUV

not attested not anchored not stored refs pending

A Time-Variable X-Ray Echo: Indications of a Past Flare of the Galactic-Center Black Hole

Hironori Matsumoto, Katsuji Koyama, Takeshi Go Tsuru (Kyoto University), Tatsuya Inui

arxiv:0711.2853 v1 · 2007-11-19 · 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{D4BURP53NJSGE6QSVIQ7UQ2HUV}

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	2026-05-18T00:52:42.520484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f0348bfbb6a64627a12aa21fa4347a56f546cdce81d346eef7670299db3efbf

Aliases

arxiv: 0711.2853 · arxiv_version: 0711.2853v1 · doi: 10.48550/arxiv.0711.2853 · pith_short_12: D4BURP53NJSG · pith_short_16: D4BURP53NJSGE6QS · pith_short_8: D4BURP53

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/D4BURP53NJSGE6QSVIQ7UQ2HUV \
  | 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: 1f0348bfbb6a64627a12aa21fa4347a56f546cdce81d346eef7670299db3efbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "544ea9b75bc348bce4934e4a33c921b8e51361f3fbf1bdd49c4d6419c5edac14",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-11-19T07:29:25Z",
    "title_canon_sha256": "01afb581f355d7b1e7ded09b8ca8a765d766c9b9d0b7118bf144af5cdefeda98"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0711.2853",
    "kind": "arxiv",
    "version": 1
  }
}