Photon-Count Statistics of Crab X-ray Pulses: Skellam Behavior and Excess Variance in the Main Pulse

Fuente: arXiv

Salvato in:

Dettagli Bibliografici
Autori principali:	Worchel, Max, Ferris, Margaret M., Levina, Sasha, Horn, Iris, Tygh, Mac, Lommen, Andrea N., Wood, Kent S., Ray, Paul S., Deneva, Julia S., Lewandowska, Natalia, Kerr, Matthew, Hazboun, Jeffrey S., Howe, David A., Arzoumanian, Zaven, Bogdanov, Slavko, Markwardt, Craig B., Enoto, Teruaki, Gendreau, Keith C.
Natura:	Preprint
Pubblicazione:	2026
Soggetti:	High Energy Astrophysical Phenomena
Accesso online:	Acceder al recurso
Tags:	Aggiungi Tag Nessun Tag, puoi essere il primo ad aggiungerne!!

Documenti analoghi

Eclipsing Stellar Flare on the Demon Star Algol Binary System Observed during the MAXI-NICER Follow-up Campaign in 2018
di: Nakayama, Kazuya, et al.
Pubblicazione: (2025)

The STROBE-X Low Energy Modular Array (LEMA) Instrument
di: Gendreau, Keith C., et al.
Pubblicazione: (2024)

The Magnificent Seven X-ray Isolated Neutron Stars Revisited. I. Improved Timing Solutions and Pulse Profile Analysis
di: Bogdanov, Slavko, et al.
Pubblicazione: (2024)

High-velocity blue-shifted Fe XXV He$α$ line during a superflare of the RS CVn-type star IM Peg
di: Inoue, Shun, et al.
Pubblicazione: (2024)

A Statistical Analysis of Crab Pulsar Giant Pulse Rates
di: Doskoch, Graham M., et al.
Pubblicazione: (2024)

A NICER View of PSR J1231$-$1411: A Complex Case
di: Salmi, Tuomo, et al.
Pubblicazione: (2024)

Origin of the stellar Fe Kα line clarified with FUV and X-ray observations of a superflare on the RS Canum Venaticorum-type Star UX Arietis
di: Inoue, Shun, et al.
Pubblicazione: (2025)

New and updated timing models for seven young energetic X-ray pulsars, including the Big Glitcher PSR J0537-6910
di: Ho, Wynn C. G., et al.
Pubblicazione: (2025)

A More Precise Measurement of the Radius of PSR J0740+6620 Using Updated NICER Data
di: Dittmann, Alexander J., et al.
Pubblicazione: (2024)

Impact of Accretion Assumptions on Pulse Profile Modelling of Superburst Oscillations in 4U 1636-536
di: Kini, Yves, et al.
Pubblicazione: (2025)

Systematic NICER study of the low-ionized Fe K$α$ line on RS Canum Venaticorum type stars
di: Inoue, Shun, et al.
Pubblicazione: (2025)

Observational Clues to the Magnetic Evolution of Magnetars
di: Makishima, Kazuo, et al.
Pubblicazione: (2024)

Evidence for 1.01 s Pulsations of the Central Compact Object in the Supernova Remnant RCW 103 with ASCA, XMM-Newton, and NuSTAR
di: Makishima, Kazuo, et al.
Pubblicazione: (2026)

Discovery of the Free Precession in the Magnetar SGR 1806$-$20 with the ASCA GIS
di: Makishima, Kazuo, et al.
Pubblicazione: (2024)

Rapid spin changes around a magnetar fast radio burst
di: Hu, Chin-Ping, et al.
Pubblicazione: (2024)

Exploring Waveform Variations among Neutron Star Ray-tracing Codes for Complex Emission Geometries
di: Choudhury, Devarshi, et al.
Pubblicazione: (2024)

Constraining the Properties of the Thermonuclear Burst Oscillation Source XTE J1814-338 Through Pulse Profile Modelling
di: Kini, Yves, et al.
Pubblicazione: (2024)

Radiative Backpropagation with Non-Static Geometry
di: Worchel, Markus, et al.
Pubblicazione: (2025)

Adjunctive Pulsed Dye Laser Therapy for Paronychia Induced by Anticancer Agents
di: Thunyaporn Pruangmethangkul, et al.
Pubblicazione: (2025)

Skellam Random Fields and Their Fractional Variants
di: Vishwakarma, Pradeep
Pubblicazione: (2025)

Point processes of the Poisson-Skellam family
di: Cinque, Fabrizio, et al.
Pubblicazione: (2025)

Fractional Skellam Process of Order $k$
di: Kataria, K. K., et al.
Pubblicazione: (2021)

Pulse
Pubblicazione: (2022)

Pulse
Pubblicazione: (2023)

Impact of Excess AIMD Lead Winding Near the Implantable Pulse Generator on MRI RF ‐Induced Heating
di: Ziyu Zuo, et al.
Pubblicazione: (2025)

Quasi-periodic variation during a fast X-ray outburst of a high-mass X-ray binary MAXI J0709-159 / LY CMa observed by NICER
di: Sugizaki, Mutsumi, et al.
Pubblicazione: (2025)

NICER Magnetar Burst Catalog
di: Chu, Che-Yen, et al.
Pubblicazione: (2025)

Modular Automatic Complexity Analysis of Recursive Integer Programs
di: Lommen, Nils, et al.
Pubblicazione: (2025)

Targeting Completeness: Using Closed Forms for Size Bounds of Integer Programs
di: Lommen, Nils, et al.
Pubblicazione: (2023)

The Radius of the High-mass Pulsar PSR J0740+6620 with 3.6 yr of NICER Data
di: Salmi, Tuomo, et al.
Pubblicazione: (2024)

Pulse Profile Variability of PSR J1022+1001 in NANOGrav Data
di: Fiore, William, et al.
Pubblicazione: (2024)

Investigation of non-equilibrium ionization plasma during a giant flare of UX Arietis triggered with MAXI and observed with NICER
di: Kurihara, Miki, et al.
Pubblicazione: (2024)

Non-Homogeneous Generalized Fractional Skellam Process
di: Tathe, Kartik, et al.
Pubblicazione: (2024)

Skellam Processes via Multiparameter Poisson Process
di: Vishwakarma, Pradeep
Pubblicazione: (2025)

Generalized Space Time Fractional Skellam Process
di: Tathe, Kartik, et al.
Pubblicazione: (2025)

Time-changed generalized fractional Skellam process
di: Khandakar, Mostafizar, et al.
Pubblicazione: (2025)

Pulsed Laser Template Engineering- PLATEN
di: Biswas, Dhiman, et al.
Pubblicazione: (2026)

Feedback Pulses
di: Kaushik, Vishesh, et al.
Pubblicazione: (2024)

On the Origin of Spectral Features Observed during Thermonuclear X-ray Bursts and in the Aftermath Emission of a Long Burst from 4U 1820-30
di: Jaisawal, Gaurava K., et al.
Pubblicazione: (2025)

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
VUFIND_SESSION	"df2d858ae13d18420aaa35382b8b8c4b"
language	"it"
ui	"standard"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1790990245.3348 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "df2d858ae13d18420aaa35382b8b8c4b" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#938}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1433}
SessionHelper	Laminas\Stdlib\ArrayObject {#1759}

Server/Request Data

Key	Value
REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"info.umar.mx"
REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"VUFIND_SESSION=df2d858ae13d18420aaa35382b8b8c4b; language=it; ui=standard"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.66 (Ubuntu)"
SERVER_NAME	"info.umar.mx"
SERVER_ADDR	"200.23.222.19"
SERVER_PORT	"443"
REMOTE_ADDR	"216.73.217.142"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"16128"
REDIRECT_URL	""" /Record/\n arxiv_https___arxiv_org_abs_2604_05050/Similar """
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/%0Aarxiv_https___arxiv_org_abs_2604_05050/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1790990245.3291
REQUEST_TIME	1790990245

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler