| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
13:28:38 UTC |
Swift |
| ra |
7.4960° |
Swift |
| decl |
44.2900° |
Swift |
| pos_error |
2.33e-02° |
Swift |
| fluence |
1.25e-07 erg/cm² |
Swift |
| GBM_located |
False |
|
| mjd |
57172.56155092592 |
Swift |
| IPN table |
|---|
| GRB_name |
GRB150530B |
| ra |
7.4958° |
| decl |
44.2833° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB150530B |
| t_trigger |
13:28:38 UTC |
| ra |
7.4960° |
| decl |
44.2900° |
| pos_error |
2.33e-02° |
| fluence |
1.25e-07 erg/cm² |
| GCN 17895 table |
|---|
| GRB_name |
GRB150530B |
| GCN_number |
17895 |
| Detection_method |
Swift-BAT Det |
| ra |
7.4960° |
| decl |
44.2900° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17895
SUBJECT: GRB 150530B detected in ground analysis of BAT data
DATE: 15/06/02 03:16:46 GMT
FROM: Jay R. Cummings at NASA/GSFC/Swift
J. R. Cummings (CPI) and D. M. Palmer (LANL)
report on behalf of the Swift science team:
At 13:28:38 during a preplanned Swift slew, GRB 150530B caused a rate
increase in Swift-BAT. Photon event data were collected during the slew.
In ground analysis, we detect a significant source in a mosaic image.
The source was at RA, Dec 7.496, +44.290 which is:
RA (J2000) 00h 29m 59.0s
Dec (J2000) +44d 17' 25"
with an estimated 90% containment radius of 3 arcmin.
In BAT, the burst lasted 2.0 +- 0.4 seconds. The spectrum was soft, with
no detected excess above 100 keV.
The best fit to the spectrum from 15-150 keV is a simple power law with
a photon index of 1.7 +- 0.2. The fluence in 2 seconds was
(1.25 +- 0.2) x 10^-7 ergs/cm^2. The uncertainties quoted are estimated
90% confidence.
|
| GCN 17896 table |
|---|
| GRB_name |
GRB150530B |
| GCN_number |
17896 |
| Detection_method |
Swift Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17896
SUBJECT: GRB 150530B: Swift ToO observations
DATE: 15/06/02 07:11:16 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 Swift/BAT GRB 150530B.
Automated analysis of the XRT data will be presented online at
http://www.swift.ac.uk/ToO_GRBs/00020522
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 Swift/BAT 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 17899 table |
|---|
| GRB_name |
GRB150530B |
| GCN_number |
17899 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17899
SUBJECT: GRB 150530B: Swift-XRT observations
DATE: 15/06/02 14:46:01 GMT
FROM: Phil Evans at U of Leicester
P. D'Avanzo (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows
(PSU), J.A. Kennea (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U.
Leicester), V. D'Elia (ASDC), A. D'a (INAF-IASFPA) and P.A. Evans (U.
Leicester) report on behalf of the Swift-XRT team:
Swift-XRT has performed follow-up observations of the
Swift/BAT-detected burst GRB 150530B (Cummings et al. GCN Circ. 17895),
collecting 4.8 ks of Photon Counting (PC) mode data between T0+239.2 ks
and T0+247.3 ks.
No X-ray sources have been detected inside or close to the Swift/BAT
error region. The 3-sigma upper limit in the field ranges from ~0.003
to ~0.004 ct s^-1, corresponding to a 0.3-10 keV observed flux of
1.0e-13 to 1.5e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).
Four uncatalogued sources were detected too far from the GRB position
to be likely afterglow candidates.
The results of the XRT-team automatic analysis of the XRT observations,
including a position-specific upper limit calculator, are available at
http://www.swift.ac.uk/ToO_GRBs/00020522.
This circular is an official product of the Swift-XRT team.
|