- GCN/BACODINE POSITION NOTICE
TITLE: GCN/MAXI NOTICE
NOTICE_DATE: Sun 15 Dec 13 10:48:41 UT
NOTICE_TYPE: MAXI Unknown Source Position
EVENT_ID_NUM: 641314228
EVENT_RA: 259.03d {+17h 16m 07s} (J2000),
259.20d {+17h 16m 47s} (current),
258.42d {+17h 13m 42s} (1950)
EVENT_DEC: +7.59d {+07d 35' 28"} (J2000),
+7.58d {+07d 34' 35"} (current),
+7.65d {+07d 38' 44"} (1950)
EVENT_ERROR: 1.0 [deg radius, stat+sys, 90% containment]
EVENT_FLUX: 468.0 +- 0.0 [mCrab]
EVENT_DATE: 16641 TJD; 349 DOY; 13/12/15
EVENT_TIME: 32912.00 SOD {09:08:32.00} UT
EVENT_TSCALE: 10s
EVENT_EBAND: Medium, 4-10 keV
SUN_POSTN: 263.06d {+17h 32m 13s} -23.28d {-23d 17' 00"}
SUN_DIST: 31.09 [deg]
MOON_POSTN: 60.44d {+04h 01m 45s} +18.39d {+18d 23' 36"}
MOON_DIST: 148.11 [deg]
MOON_ILLUM: 97 [%]
GAL_COORDS: 28.83, 24.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 257.35, 30.55 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: MAXI Unknown Source Position. GRB or unknown X-ray Transient.
- GCN Circular #15597
K. Fukushima, H. Negoro (Nihon U.),
S. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA),
T. Mihara, M. Sugizaki, M. Morii, M. Serino, J. Sugimoto, T. Takagi, A. Yoshikawa, M. Matsuoka (RIKEN),
N. Kawai, R. Usui, T. Yoshii, Y. Tachibana (Tokyo Tech),
A. Yoshida, T. Sakamoto, Y. Nakano, Y. Kawakubo, H. Ohtsuki (AGU),
H. Tsunemi, M. Sasaki (Osaka U.),
M. Nakajima, H. Sakakibara, T. Onodera, K. Suzuki (Nihon U.),
Y. Ueda, M. Shidatsu, T. Kawamuro, T. Hori (Kyoto U.),
Y. Tsuboi, M. Higa (Chuo U.),
M. Yamauchi, K. Yoshidome, Y. Ogawa, H. Yamada (Miyazaki U.),
K. Yamaoka (Nagoya U.)
report on behalf of the MAXI team:
The MAXI/GSC Nova alert system triggered a bright uncatalogued X-ray transient source at
UT 2013-12-15T09:08:20.
Assuming that the source flux was constant over the transit,
we obtain the source position at
(R.A., Dec) = (258.654 deg, 7.862 deg) = (17 14 36, +07 51 43) (J2000)
with a statistical 90% C.L. elliptical error region
with long and short radii of 0.25 deg and 0.21 deg, respectively.
The roll angle of the long axis from the north direction is 90.0 deg counterclockwise.
There is an additional systematic uncertainty of 0.1 deg (90% containment radius).
The X-ray flux averaged over the scan was 350 +- 55 mCrab (4-10keV, 1 sigma error).
Without the assumption about the source constancy, we obtain a rectangular error
box for the transient source with the following corners:
(R.A., Dec) = (258.538 deg, 7.338 deg) = (17 14 09, +07 20 16) (J2000)
(R.A., Dec) = (258.123 deg, 7.633 deg) = (17 12 29, +07 37 59) (J2000)
(R.A., Dec) = (258.913 deg, 8.557 deg) = (17 15 39, +08 33 24) (J2000)
(R.A., Dec) = (259.333 deg, 8.266 deg) = (17 17 19, +08 15 57) (J2000)
There was no significant excess flux in the previous transit at 07:35 UT
and in the next transit at 10:50 UT with an upper limit of 20 mCrab for each.
- GCN Circular #15754
S. Golenetskii, R.Aptekar, V. Pal'shin, D. Frederiks, P. Oleynik, M.
Ulanov, D. Svinkin, A. Tsvetkova and T. Cline on behalf of the
Konus-Wind team report:
The long GRB 131215A (MAXI/GSC detection and localization:
K. Fukushima et al., GCN 15597) was detected by Konus-Wind
in the waiting mode at about T0(MAXI)= 32900 s UT (09:08:20).
The burst began with a pulse with a duration of about 60 s, followed by
a less intense emission lasting ~240 s. The total burst duration was
about 300 s.
As observed by Konus-Wind, the burst had a fluence
of (1.4 +/- 0.3)x10^-5 erg/cm2 (in the 20 - 1200 keV energy range).
Modelling the K-W 3-channel time-integrated spectrum
(from T0(KW) to T0(KW)+300 s)
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields
alpha = -1.28 (-0.27, +0.31), and
Ep = 263 (-87, +234) keV
All the quoted errors are estimated at the 1 sigma confidence level.
The K-W light curve of this burst is available at
http://www.ioffe.rssi.ru/LEA/GRBs/GRB131215A/
Previous IAU Circulars 