From maxiweb at maxi.riken.jp  Fri Sep  5 02:46:16 2025
From: maxiweb at maxi.riken.jp (maxiweb at maxi.riken.jp)
Date: Fri, 05 Sep 2025 02:46:16 +0900
Subject: [X-ray-star:978] X-ray flare from Algol
Message-ID: <20250904174616.94300646DAED@maxi.riken.jp>

Possible X-ray flare from Algol (W.Iwakiri).

=====================
MAXI transient alert
2025-09-04 16:29:55 UT
=====================

[Ground Trigger ID]
ID          :  0922530697

[Count Weighted Position]
RA,Dec: ( 46.196,  41.553)
Galac.: (148.102, -14.704)
Eclip.: ( 55.701,  23.188)

[Triggered Criteria]
S  :  10s, 30s, 1scan
M  :  10s, 30s, 1scan

[Highest Significance]
DPTC  : 1441038520
UT    : 2025/09/04 16:29:55
on    : 30s (S-band)
sigma : 6.6

[Observed flux]
S :     86 +-    13 mCrab
L :     55 +-    14 mCrab
M :    127 +-    23 mCrab
H :    -32 +-    85 mCrab

nearby(r<5deg) object
=====================
dist  flux  (RA, Dec)        name
[deg][mCrab]  [deg]
=====================
0.87     -0.9 ( 47.04,  40.96)  Algol,Beta Per
1.92  unknown ( 43.63,  41.59)  AWM 7,4U 0253+41
2.81     35.2 ( 49.95,  41.51)  Perseus Cluster,NGC 1275
3.00  unknown ( 45.19,  44.46)  CIZA J0300.7+4427

[Sun/Moon (RA, Dec)]
Sun :  (163.437, 7.047)
Moon:  (306.098, -23.156)
age: 11.89 day

[Latitude/Longitude]
(23.12N, 61.28E)


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For more information:
 http://maxi.riken.jp/alert/novae/0922530697/0922530697.htm

About MAXI data:
 http://maxi.riken.jp/