| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB150219522 |
|
| T0 |
12:31:12.259 UTC |
Fermi_GBM |
| ra |
271.2667° |
IPN |
| decl |
-41.6000° |
IPN |
| pos_error |
5.50e-02° |
IPN |
| T90 |
36.097 s |
Fermi_GBM |
| T90_error |
3.114 s |
Fermi_GBM |
| T90_start |
12:31:13.795 UTC |
Fermi_GBM |
| fluence |
7.72e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
3.80e-08 erg/cm² |
Fermi_GBM |
| T100 |
37.633 s |
|
| GBM_located |
False |
|
| mjd |
57072.521669664355 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB150219522 |
| trigger_name |
bn150219522 |
| ra |
271.2658° |
| decl |
-41.5850° |
| pos_error |
3.62e+00° |
| datum |
2015-02-19 |
| t_trigger |
12:31:12.259 UTC |
| T90 |
36.097 s |
| T90_error |
3.114 s |
| T90_start |
12:31:13.795 UTC |
| fluence |
7.72e-06 erg/cm² |
| fluence_error |
3.80e-08 erg/cm² |
| flux_1024 |
4.18e+00 erg/cm²/s |
| flux_1024_error |
3.04e-01 erg/cm²/s |
| flux_1024_time |
9.66e+00 erg/cm²/s |
| flux_64 |
6.12e+00 erg/cm²/s |
| flux_64_error |
1.50e+00 erg/cm²/s |
| IPN table |
|---|
| GRB_name |
GRB150219A |
| ra |
271.2667° |
| decl |
-41.6000° |
| pos_error |
5.50e-02° |
| GCN 17476 table |
|---|
| GRB_name |
GRB150219A |
| GCN_number |
17476 |
| Detection_method |
INTEGRAL |
| t_trigger |
12:31:14 UTC |
| ra |
271.2664° |
| decl |
-41.5849° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17476
SUBJECT: GRB 150219A: A long GRB detected by INTEGRAL
DATE: 15/02/19 13:30:46 GMT
FROM: Sandro Mereghetti at IASF/CNR
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo
(ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS
Localization Team report:
a gamma ray burst lasting about 60 s has been detected by IBAS in the
IBIS/ISGRI data at 12:31:14 UT of February 19
The refined coordinates (J2000) are:
R.A.= 271.2664 deg
DEC.= -41.5849 deg
with an uncertainty of 2 arcmin (90% c.l.).
The burst had a peak flux of 1.4 counts/cm2/s (20-200 keV, 1-s integration
time) and a fluence in the same energy range of about 4e-6 erg/cmq.
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
|
| GCN 17477 table |
|---|
| GRB_name |
GRB150219A |
| GCN_number |
17477 |
| Detection_method |
Swift Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17477
SUBJECT: GRB 150219A: Swift ToO observations
DATE: 15/02/19 15:04:27 GMT
FROM: Phil Evans at U of Leicester
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a ToO observation of the INTEGRAL GRB 150219A.
Automated analysis of the XRT data will be presented online at
http://www.swift.ac.uk/ToO_GRBs/00020483
Any uncatalogued X-ray sources detected in this analysis will be
reported on this website and via GCN COUNTERPART notices. These are
not necessarily related to the INTEGRAL event. Any X-ray source
considered to be a probable afterglow candidate will be reported via a
GCN Circular after manual consideration.
Details of the XRT automated analysis methods are detailed in Evans et
al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8).
This circular is an official product of the Swift-XRT team.
|
| GCN 17480 table |
|---|
| GRB_name |
GRB150219A |
| GCN_number |
17480 |
| Detection_method |
Swift-XRT Other |
| ra |
271.2507° |
| decl |
-41.5942° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17480
SUBJECT: GRB 150219A: Swift-XRT afterglow detection
DATE: 15/02/19 23:34:23 GMT
FROM: Valerio D'Elia at ASDC
K.L. Page (U. Leicester), C. Pagani (U. Leicester), A. Melandri
(INAF-OAB), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), J.A. Kennea
(PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), A.P. Beardmore
(U. Leicester) and P.A. Evans (U. Leicester) report on behalf of the
Swift-XRT team:
Swift-XRT has performed follow-up observations of the INTEGRAL-detected
burst GRB 150219A (Mereghetti et al. GCN Circ. 17476), collecting 2.6
ks of Photon Counting (PC) mode data between T0+10.5 ks and T0+23.4 ks.
An uncatalogued X-ray source is detected inside the INTEGRAL error
region and is fading with 3-sigma significance, and is therefore likely
the GRB afterglow. The position of this source is RA, Dec=271.2507,
-41.5942 which is equivalent to:
RA (J2000): 18:05:0.18
Dec(J2000): -41:35:39.0
with an uncertainty of 3.7 arcsec (radius, 90% confidence). This
position is 53 arcsec from the INTEGRAL position.
The light curve can be modelled with a power-law decay with a decay
index of alpha=2.8 (+0.9, -0.7).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 1.8 (+/-0.4). The
best-fitting absorption column is 1.6 (+0.6, -0.5) x 10^22 cm^-2, in
excess of the Galactic value of 1.4 x 10^21 cm^-2 (Willingale et al.
2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion
factor deduced from this spectrum is 6.3 x 10^-11 (1.1 x 10^-10) erg
cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 1.6 (+0.6, -0.5) x 10^22 cm^-2
Galactic foreground: 1.4 x 10^21 cm^-2
Excess significance: 4.6 sigma
Photon index: 1.8 (+/-0.4)
If the light curve continues to decay with a power-law decay index of
2.8, the count rate at T+24 hours will be 5.8 x 10^-4 count s^-1,
corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.6 x
10^-14 (6.2 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis of the likely afterglow
are at http://www.swift.ac.uk/ToO_GRBs/00020483/index_1.php.
The results of the full analysis of the XRT observations are available
at http://www.swift.ac.uk/ToO_GRBs/00020483.
This circular is an official product of the Swift-XRT team.
|
| GCN 17481 table |
|---|
| GRB_name |
GRB150219A |
| GCN_number |
17481 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
12:31:12.260 UTC |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17481
SUBJECT: GRB 150219A: Fermi GBM observation
DATE: 15/02/20 10:02:13 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 12:31:12.26 UT on 19 February 2015, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 150219A (trigger 446041875 / 150219522), which
was also detected by INTEGRAL/IBIS (Mereghetti et al. 2015, GCN 17476).
The GBM on-ground location is consistent with the INTEGRAL position.
The angle from the Fermi LAT boresight is 105 degrees.
The GBM light curve shows a structured pulse
with a duration (T90) of about 36 s (50-300 keV).
The time-averaged spectrum from T0-2.304 s to T0+38.657 s is
best fit by a power law function with an exponential
high-energy cutoff. The power law index is -0.92 (+0.08/-0.07) and
the cutoff energy, parameterized as Epeak, is 202.7(+23.2/-19.1) keV.
The event fluence (10-1000 keV) in this time interval is
(1.00 +/- 0.05)E-05 erg/cm^2. The 1.024-sec peak photon flux measured
starting from T0+9.664 s in the 10-1000 keV band
is 4.2 +/- 0.3 ph/s/cm^2.
A Band function fits the spectrum equally well with Epeak=
166.7(+24.3/-17.3) keV,
alpha = -0.82 +/- 0.10 and beta = -2.17 (+0.13/-0.24).
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|