[X-ray-star:841] V4641 Sgr

[maxiweb at maxi.riken.jp]

New outburst from the black hole candidate V4641 Sgr (M. Nakajima, H.
Negoro)

=====================
MAXI transient alert
2021-10-12 14:49:08 UT
=====================

[Ground Trigger ID]
ID          :  9499476245

[Count Weighted Position]
RA,Dec: (274.380, -24.896)
Galac.: (  7.037,  -4.191)
Eclip.: (273.974,  -1.517)

[Triggered Criteria]
S  :  4d

[Highest Significance]
DPTC  : 1318085334
UT    : 2021/10/12 14:49:08
on    : 4d (S-band)
sigma : 3.2

[Observed flux]
S :     45 +-    14 mCrab
L :     30 +-    17 mCrab
M :     85 +-    25 mCrab
H :     -4 +-    77 mCrab

nearby(r<5deg) object
=====================
dist  flux  (RA, Dec)        name
[deg][mCrab]  [deg]
=====================
0.25  unknown (274.34, -25.14)  IGR J18173-2509
0.41      3.9 (274.60, -24.54)  XTE J1818-245
0.66     26.0 (274.84, -25.41)  V4641 Sgr,SAX J1819.3-2525
1.58      9.6 (276.12, -24.85)  AX J1824.5-2451
1.59      9.6 (276.14, -24.87)  M 28,IGR J18245-2452
1.73  unknown (273.22, -23.53)  PSR J1809-2332,0FGL J1809.5-2331
1.98      4.2 (272.69, -26.15)  SAX J1810.8-2609,V4722 Sgr
2.44      7.8 (271.71, -24.58)  2S 1803-245,SAXWFC J1806.9-2434.7
2.44  unknown (272.59, -23.09)  V5588 Sgr
2.60     -0.3 (277.24, -25.03)  MAXI J1828-249
2.81      0.7 (273.12, -22.33)  MAXI J1810-222
2.94    153.7 (277.37, -23.80)  GS 1826-238,V4634 Sgr
3.05  unknown (271.96, -22.80)  MAXI J1807-228
3.66  unknown (271.62, -22.25)  SAX J1806.5-2215
3.72    916.9 (270.28, -25.08)  GX 5-1,1RXS J180108.7-250444
3.78     21.2 (270.30, -25.74)  GRS 1758-258,1RXS J180112.6-254435
4.25  unknown (270.25, -22.95)  SGR 1801-23,SGR1801-23
4.66      4.2 (269.24, -25.11)  Swift J1756.9-2508
4.69  unknown (271.86, -29.01)  V5585 Sgr
4.93  unknown (272.16, -20.41)  SGR 1806-20
4.99      4.2 (269.94, -22.02)  XTE J1759-220,KRL2007b 297

[Sun/Moon (RA, Dec)]
Sun :  (197.717, -7.519)
Moon:  (283.789, -26.191)
age: 6.29 day

[Latitude/Longitude]
(4.44N, 54.89E)


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For more information:
 http://maxi.riken.jp/alert/novae/9499476245/9499476245.htm

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