- GCN/BACODINE POSITION NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 07 Nov 15 17:26:06 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 662757, Seg_Num: 0
GRB_RA: 217.139d {+14h 28m 33s} (J2000),
217.434d {+14h 29m 44s} (current),
216.215d {+14h 24m 52s} (1950)
GRB_DEC: -59.680d {-59d 40' 46"} (J2000),
-59.750d {-59d 44' 59"} (current),
-59.456d {-59d 27' 22"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=4000 [image_cnts]
TRIGGER_DUR: 360.000 [sec] (=6.0 [min])
TRIGGER_INDEX: 20000 E_range: 15-50 keV
BKG_INTEN: 0 [cnts]
BKG_TIME: 0.00 SOD {00:00:00.00} UT
BKG_DUR: 0 [sec]
GRB_DATE: 17333 TJD; 311 DOY; 15/11/07
GRB_TIME: 62376.61 SOD {17:19:36.61} UT
GRB_PHI: -51.05 [deg]
GRB_THETA: 9.53 [deg]
SOLN_STATUS: 0x13
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 7.65 [sigma]
MERIT_PARAMS: +1 +0 +0 +7 +1 -2 -100 +1 -72 +0
SUN_POSTN: 222.51d {+14h 50m 03s} -16.33d {-16d 19' 40"}
SUN_DIST: 43.58 [deg] Sun_angle= 0.3 [hr] (West of Sun)
MOON_POSTN: 181.04d {+12h 04m 11s} -0.45d {-00d 26' 42"}
MOON_DIST: 65.65 [deg]
MOON_ILLUM: 14 [%]
GAL_COORDS: 314.91, 0.91 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 237.14,-42.12 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This is an image trigger. (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 234.73,-20.37 [deg].
- red DSS finding chart
ps-file
- GCN NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 07 Nov 15 17:28:48 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 662757, Seg_Num: 0
GRB_RA: 217.139d {+14h 28m 33s} (J2000),
217.434d {+14h 29m 44s} (current),
216.215d {+14h 24m 52s} (1950)
GRB_DEC: -59.680d {-59d 40' 46"} (J2000),
-59.750d {-59d 44' 59"} (current),
-59.456d {-59d 27' 22"} (1950)
GRB_DATE: 17333 TJD; 311 DOY; 15/11/07
GRB_TIME: 62376.61 SOD {17:19:36.61} UT
TRIGGER_INDEX: 20000
GRB_PHI: -51.05 [deg]
GRB_THETA: 9.53 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 360.000 [sec] (=6.0 [min])
SOLN_STATUS: 0x13
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 7.65 [sigma]
LC_URL: sw00662757000msb.lc
SUN_POSTN: 222.52d {+14h 50m 04s} -16.33d {-16d 19' 42"}
SUN_DIST: 43.58 [deg] Sun_angle= 0.3 [hr] (West of Sun)
MOON_POSTN: 181.07d {+12h 04m 16s} -0.45d {-00d 27' 07"}
MOON_DIST: 65.64 [deg]
MOON_ILLUM: 14 [%]
GAL_COORDS: 314.91, 0.91 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 237.14,-42.12 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Lightcurve.
COMMENTS:
COMMENTS: The next comments were copied from the BAT_POS Notice:
COMMENTS: This is an image trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 234.73,-20.37 [deg].
- GCN Circular #18564
A. Y. Lien (GSFC/UMBC), S. B. Cenko (GSFC), N. Gehrels (NASA/GSFC) and
K. L. Page (U Leicester) report on behalf of the Swift Team:
At 17:19:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 151107A (trigger=662757). Swift could not
slew to the burst due to an observing constraint.
The BAT on-board calculated location is
RA, Dec 217.139, -59.680 which is
RA(J2000) = 14h 28m 33s
Dec(J2000) = -59d 40' 46"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). As is usual for an image trigger,
the immediately-available BAT lightcurve shows no obvious activity.
Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 15:26 UT on 2015 December 12. There will thus be no XRT
or UVOT data for this trigger before this time.
We note that this location is within a degree of the Galactic plane,
so this may be a Galactic transient. Further determination of the
nature of the source will require the full downlinked dataset.
Burst Advocate for this burst is A. Y. Lien (amy.y.lien AT nasa.gov).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
- GCN Circular #18565
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
E. Gorbovskoy, V. Lipunov, N.Tyurina, V.Kornilov, P.Balanutsa, A.Kuznetsov,
D.Kuvshinov, D. Vlasenko, E.Popova
Lomonosov Moscow State University, Sternberg Astronomical Institute
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
V.Krushinski, I.Zalozhnih
Ural Federal University, Kourovka
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER-SAAO robotic telescope (MASTER-Net: http://observ.pereplet.ru),
located in SAAO, received Swift GRB 151107A at the sunset, when the Sun
altitude was -3.4 degrees, GRB altitude was 18.4 degrees.
MASTER-SAAO was pointed to the GRB151107A 1750 sec after notice time
and 2141 sec after trigger time at 2015-11-07 17:55:20 UT (Sun Altitude:
-10.34, Alert altitude: 14.75). On our images (180s exposure) we haven`t
found optical transient within SWIFT error-box (ra=14 28 33 dec=-59 40 46
r=0.05). The 5-sigma upper limit has been about 17.2mag. There is a
bright star near the BAT coordinates. GRB is setting.
The best single image was started at 2015-11-07 18:49:45 (exp 180)
m_lim = 18.3 mag.
The message may be cited.
- GCN Circular #18568
S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),
D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU),
T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 151107A (trigger #662757)
( Lien et al., GCN Circ. 18564). The BAT ground-calculated position is
RA, Dec = 217.139, -59.680 deg which is
RA(J2000) = 14h 28m 33.4s
Dec(J2000) = -59d -40' -46.9"
with an uncertainty of 2.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
The mask-weighted light curve shows no obvious structure. The event starts
before the beginning of captured data at T-239 sec and extends out past the
end of collected event data at T+910 sec when the source location left the FoV
when the spacecraft slewed to a new target.
This burst occurred during the period of recovering the thermal control system
(Barthelmy et al., GCN Circ. 18562). The CZT bias voltage has been reduced
to -150v (instead of the normal -200v) and as such the energy scale is not fully
calibrated. Therefore, an accurate spectral analysis is unavailable.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/662757/BA/
- GCN Circular #18571
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), A. Y. Lien (GSFC/UMBC),
C. B. Markwardt (GSFC), and D. M. Palmer (LANL) report on behalf of
the Swift-BAT team:
We perform further investigation regarding the uncertainty of the source nature
of GRB151107A (Lien et al., GCN Circ. 18564) due to its proximity to the
Galactic plane (within 1 deg) and the featureless light curve.
Using analysis from the BAT transient monitor (Krimm et al., 2013), there is
no significant emission in the 15-50 keV band at ~ 4000 s before and ~ 6000 s
after the event data (signal-to-noise ratio < 1.8 sigma). The source was out of
the field of view for the immediate time outside the event data range due to
pre-planned telescope slews. A search in the daily mosaic images at the burst
location shows a 4-sigma detection on Nov. 7 (12.5 mCrab) and 1.6 sigma on
Nov. 8 (which corresponds to a 1-sigma upper limit of ~ 5 mCrab).
This flux level and time profile are consistent with a GRB, and appear dimmer
and shorter than a usual accreting binary source during outburst. However,
we cannot rule out other possible Galactic transients, such as thermonuclear
bursts or flaring stars.
In addition, we note that within 20.3 arcsec of the revised BAT position is the
bright M2/M3 type star designated HD 126577. It is possible that the BAT
detections correspond to a flaring episode from HD 126577, although this
star is not known for such episodes.
Previous IAU Circulars 