- GCN/BACODINE POSITION NOTICE
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Tue 14 May 13 13:26:39 UT
NOTICE_TYPE: INTEGRAL Wakeup
TRIGGER_NUM: 6843, Sub_Num: 0
GRB_RA: 147.6074d {+09h 50m 26s} (J2000),
147.7649d {+09h 51m 04s} (current),
147.0182d {+09h 48m 04s} (1950)
GRB_DEC: -18.9743d {-18d 58' 26"} (J2000),
-19.0372d {-19d 02' 13"} (current),
-18.7400d {-18d 44' 23"} (1950)
GRB_ERROR: 2.73 [arcmin, radius, statistical only]
GRB_INTEN: 15.19 [sigma]
GRB_TIME: 48394.63 SOD {13:26:34.63} UT
GRB_DATE: 16426 TJD; 134 DOY; 13/05/14
SC_RA: 146.12 [deg] (J2000)
SC_DEC: -13.23 [deg] (J2000)
SUN_POSTN: 51.53d {+03h 26m 08s} +18.75d {+18d 44' 56"}
SUN_DIST: 101.65 [deg] Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN: 104.17d {+06h 56m 41s} +18.31d {+18d 18' 46"}
MOON_DIST: 56.81 [deg]
GAL_COORDS: 254.37, 26.37 [deg] galactic lon,lat of the burst
ECL_COORDS: 157.21,-29.99 [deg] ecliptic lon,lat of the burst
COMMENTS: INTEGRAL GRB Coordinates.
COMMENTS: Time_Scale=0.1599 and Time_Error=2.0000.
COMMENTS: Possibly real GRB event
- red DSS finding chart
ps-file
- GCN NOTICE
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Tue 14 May 13 13:29:38 UT
NOTICE_TYPE: INTEGRAL Refined
TRIGGER_NUM: 6843, Sub_Num: 1
GRB_RA: 147.6027d {+09h 50m 25s} (J2000),
147.7602d {+09h 51m 02s} (current),
147.0135d {+09h 48m 03s} (1950)
GRB_DEC: -18.9741d {-18d 58' 26"} (J2000),
-19.0370d {-19d 02' 12"} (current),
-18.7398d {-18d 44' 22"} (1950)
GRB_ERROR: 2.57 [arcmin, radius, statistical only]
GRB_INTEN: 29.59 [sigma]
GRB_TIME: 48400.52 SOD {13:26:40.52} UT
GRB_DATE: 16426 TJD; 134 DOY; 13/05/14
SC_RA: 146.12 [deg] (J2000)
SC_DEC: -13.23 [deg] (J2000)
SUN_POSTN: 51.54d {+03h 26m 09s} +18.75d {+18d 44' 58"}
SUN_DIST: 101.65 [deg] Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN: 104.20d {+06h 56m 47s} +18.31d {+18d 18' 33"}
MOON_DIST: 56.78 [deg]
GAL_COORDS: 254.37, 26.37 [deg] galactic lon,lat of the burst
ECL_COORDS: 157.21,-29.99 [deg] ecliptic lon,lat of the burst
COMMENTS: INTEGRAL GRB Coordinates.
COMMENTS: Time_Scale=0.3199 and Time_Error=8.0000.
COMMENTS: Possibly real GRB event
COMMENTS:
COMMENTS: NOTE: This INTEGRAL event is temporally(8.0<100sec) coincident with the FERMI_GBM event (trignum=390230795).
- GCN NOTICE
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Tue 14 May 13 15:36:49 UT
NOTICE_TYPE: INTEGRAL Offline
TRIGGER_NUM: 6843, Sub_Num: 2
GRB_RA: 147.6040d {+09h 50m 25s} (J2000),
147.7615d {+09h 51m 03s} (current),
147.0148d {+09h 48m 04s} (1950)
GRB_DEC: -18.9689d {-18d 58' 07"} (J2000),
-19.0318d {-19d 01' 53"} (current),
-18.7346d {-18d 44' 04"} (1950)
GRB_ERROR: 3.00 [arcmin, radius, statistical only]
GRB_INTEN: 15.19 [sigma]
GRB_TIME: 48394.63 SOD {13:26:34.63} UT
GRB_DATE: 16426 TJD; 134 DOY; 13/05/14
SC_RA: 146.12 [deg] (J2000)
SC_DEC: -13.23 [deg] (J2000)
SUN_POSTN: 51.62d {+03h 26m 30s} +18.77d {+18d 46' 14"}
SUN_DIST: 101.57 [deg] Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN: 105.28d {+07h 01m 08s} +18.15d {+18d 09' 07"}
MOON_DIST: 55.88 [deg]
GAL_COORDS: 254.36, 26.38 [deg] galactic lon,lat of the burst
ECL_COORDS: 157.21,-29.99 [deg] ecliptic lon,lat of the burst
COMMENTS: INTEGRAL GRB Coordinates.
COMMENTS: Time_Scale=0.1599 and Time_Error=2.0000.
COMMENTS: refined_coordinates__after_offline_analysis
COMMENTS:
COMMENTS: NOTE: This INTEGRAL event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=390230795).
- GCN Circular #14638
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo,
E.Filippova (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of
the IBAS Localization Team report:
a gamma ray burst lasting about 10 s has been detected by IBAS in the
IBIS/ISGRI data at 13:26:32 UT of May 14.
A preliminary analysis gives the coordinates (J2000)
R.A.= 147.604 deg
DEC.= -18.969 deg
with an uncertainty of 3 arcmin (90% c.l.).
The burst had a peak flux of about 1 counts/cm2/s (20-200 keV, 1-s
integration time). Due to telemetry saturation we can only set a lower
limit of 6x10^-7 erg/cmq on the fluence in the same energy range.
A plot of the light curve has been posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
- GCN Circular #14644
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina,
N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov,
D.Denisenko, A.Sankovich
Sternberg Astronomical Institute, Moscow State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnih, A. Popov
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 II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka was pointed to the GRB130514B 90 sec after GRB time
but out first image were overlight by evening sky.
The first good image made 3812 sec after GRB time at 2013-05-14 14:30:06.562 UT.
On our first (180s exposure) good set we haven`t found optical transient
within INTEGRAL error-box (S.Mereghetti et. al GCN 14638).
The 5-sigma upper limit has been about 16.5 mag
The observations mae on large zenith distance z=83 deg.
The message may be cited.
- GCN Circular #14651
B.-B. Zhang (PSU), Dirk Grupe (PSU) and D. Malesani (DARK/NBI) report on
behalf of the Swift-XRT team:
We have analyzed 2.0 ks of XRT data for the INTEGRAL-detected burst:
GRB 130514B, from 5.0 ks to 10.8 ks after the INTEGRAL trigger. The
data are entirely in Photon Counting (PC) mode. An X-ray source is
detected within the INTEGRAL error circle. Using 1475 s of PC mode data
and 2 UVOT images, we find an enhanced XRT position (using the XRT-UVOT
alignment and matching UVOT field sources to the USNO-B1 catalogue):
RA, Dec = 147.60859, -18.96517 which is equivalent to:
RA (J2000): 09h 50m 26.06s
Dec(J2000): -18d 57' 54.6"
with an uncertainty of 1.8 arc sec (radius, 90% confidence). This
position is 37 arcsec from the INTEGRAL position.
The X-ray source was detect with a peak count rate of 0.31 count/s
at ~ T0+5359s, where T0= 2013 May 14 at 13:26:29.510 UT, then faded
to a count rate of 0.11 count/s at T0+11 ks.
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 2.17 (+0.31, -0.30). The
best-fitting absorption column is 3.6 (+1.2, -1.1) x 10^21 cm^-2, in
excess of the Galactic value of 3.6 x 10^20 cm^-2 (Kalberla et al.
2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion
factor deduced from this spectrum is 3.9 x 10^-11 (7.2 x 10^-11) erg
cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 3.6 (+1.2, -1.1) x 10^21 cm^-2
Galactic foreground: 3.6 x 10^20 cm^-2
Excess significance: 5.0 sigma
Photon index: 2.17 (+0.31, -0.30)
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00020275.
This circular is an official product of the Swift-XRT team.
- GCN Circular #14657
S. Schmidl, D. A. Kann (both TLS Tautenburg) and J. Greiner (MPE Garching)
report on behalf of the GROND team:
We observed the field GRB 130514B (INTEGRAL trigger 6843; Mereghetti et
al., GCN 14638) simultaneously in g'r'i'z'JHKs with GROND (Greiner et al.
2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla
Observatory (Chile).
Observations started in late twilight at 23:11:33.7 UT on May 14th, 9.75
hours after the IBAS trigger. They were performed at an average seeing of
1".6 and at an average airmass of 1.0.
Inside the 1".8 refined XRT error circle (Zhang et al., GCN 14561), we do
not detect any sources. Based on an observation with 1500 s integration
time in g'r'i'z' and 1200 s integration time in JHK, centered at 0.42572
days after the trigger, we estimate preliminary 3-sigma upper limits (all
in AB system) of
g' > 24.7,
r' > 24.4,
J > 21.0,
H > 20.7 and
K > 20.0.
Optically, this GRB is again very faint, similar to GRB 130513A (Schmidl
et al., GCN 14639). Galactic extinction is negligible. The XRT spectrum
shows strong absorption (Zhang et al., GCN 14561), and this is probably
dark GRB.
Given magnitudes are calibrated against GROND zero points (g'r'i'z') as
well as 2MASS field stars (JHK) and are not corrected for the expected
Galactic foreground extinction corresponding to a reddening of
E_(B-V)=0.03 mag in the direction of the burst (Schlegel et al. 1998).
- GCN Circular #14659
J. R. Cummings (UMBC/CRESST/GSFC) and H. A. Krimm (USRA/CRESST/NASA)
report on behalf of the Swift-BAT team:
At the time of the INTEGRAL GRB 130514B (Mereghetti et al. GCN Circ# 14638),
Swift was in a preplanned slew maneuver. BAT photon event data was
collected during this slew. BAT saves such "slew survey" data when possible
within telemetry constraints. The source was detected in a mosaic image.
As seen in BAT, the burst was a single FRED peak about 7 +/- 1 seconds long.
The source had about 10% mask coding in the BAT detector plane.
The BAT spectrum is well-fit by a power-law function with a photon index
of 1.72 +/- 0.21. The fluence from 15-150 keV in 8 seconds was
(8.8 +/- 0.6) x 10^-7 ergs/cm^2/sec. Errors are 68% confidence.
- GCN Circular #14665
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC),
William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori
Fox (UCB) J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino
Cucchiara (UCSC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM),
Jes=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels=
(GSFC),
and Harvey Moseley (GSFC) report:
We observed the field of GRB 130514B (Mereghetti, et al., GCN 14638)
with the Reionization and Transients Infrared Camera (RATIR;
www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio
Astron=F3mico Nacional on Sierra San Pedro M=E1rtir from 2013/05 15.15 to
2013/05 15.16 UTC (14.12 to 14.55 hours after the BAT trigger),
obtaining a total of 0.20 hours exposure in the r' and i' bands and 0.08
hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Zhang et al., GCN
Circular 14651), in comparison with USNO-B1 and 2MASS, we obtain the
following upper limits (3-sigma):
r' > 22.49
i' > 21.95
Z > 20.53
Y > 20.54
J > 19.66
H > 19.72
These magnitudes are in the AB system and not corrected for Galactic
extinction in the direction of the GRB.
Our non-detection is consistent with the deeper upper limits of Schmidl
et al. (GCN Circular, 14657) obtained a few hours earlier.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedr=
o
M=E1rtir.
- GCN Circular #14695
B.-B. Zhang (PSU), Dirk Grupe (PSU). D. Malesani (DARK/NBI) and J. Kennea (PSU)
report on behalf of the Swift-XRT team:
We have analyzed 6.8 ks of XRT data for the INTEGRAL-detected burst:
GRB 130514B, from 314.3 ks to 321.1 ks after the INTERGRAL trigger.
The data are entirely in Photon Counting (PC) mode. We confirm that
the X-ray source reported in Zhang et al. GCN 144651 has been faded with
current count rate of around 3e-3 count/s. The light curve can be modeled with
a power-law decay with a decay index of alpha=0.98 (+0.27, -0.15).
We therefore conclude that the X-ray source reported in Zhang et al. GCN 144651
is the X-ray afterglow of GRB 130514B.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_curves/00020275/
This circular is an official product of the Swift-XRT team.
Previous IAU Circulars 