| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
22:28:59 UTC |
GCN_circulars,Swift Det |
| ra |
133.8300° |
Swift |
| decl |
31.9840° |
Swift |
| pos_error |
2.33e-02° |
Swift |
| GBM_located |
False |
|
| mjd |
59628.936793981484 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB220218A |
| ra |
133.8292° |
| decl |
31.9833° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB220218A |
| t_trigger |
22:28:59 UTC |
| ra |
133.8300° |
| decl |
31.9840° |
| pos_error |
2.33e-02° |
| GCN 31608 table |
|---|
| GRB_name |
GRB220218A |
| GCN_number |
31608 |
| Detection_method |
Swift Det |
| t_trigger |
22:28:59 UTC |
| ra |
133.8300° |
| decl |
31.9840° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 31608
SUBJECT: GRB 220218A: Swift detection of a burst
DATE: 22/02/18 22:49:12 GMT
FROM: David Palmer at LANL
V. D'Elia (SSDC & INAF-OAR), S. Dichiara (PSU), J.D. Gropp (PSU),
N. J. Klingler (GSFC/UMBC/CRESSTII), A. Y. Lien (U Tampa),
F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL),
T. M. Parsotan (GSFC/UMBC/CRESSTII), M. H. Siegel (PSU) and
A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift
Observatory Team:
At 22:28:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220218A (trigger=1093860). Swift did not slew to the
burst location.
The BAT on-board calculated location is
RA, Dec 133.830, +31.984 which is
RA(J2000) = 08h 55m 19s
Dec(J2000) = +31d 59' 02"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve for this image trigger
shows some variation on a multi-minute timescale following the
trigger, but further analysis with the downlinked data is required
to determine whether it is due to the GRB source.
Swift is currently restarting after a reaction wheel failure, so
automatic slews to GRBs are turned off. Therefore there will be
no XRT or UVOT observations at this time.
Burst Advocate for this burst is V. D'Elia (valerio.delia AT ssdc.asi.it).
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/)
|
| GCN 31613 table |
|---|
| GRB_name |
GRB220218A |
| GCN_number |
31613 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 31613
SUBJECT: GRB 220218A: BOOTES-5/JGT optical upper limit
DATE: 22/02/19 20:09:42 GMT
FROM: Youdong HU at IAA-CSIC
Y.-D. Hu, T.-R. Sun, E. Fernandez-Garcia, A. J. Castro-Tirado, M.D. Caballero-Garcia and R. Sanchez-Ramirez (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM), C. J. Perez del Pulgar and I. Carrasco (UMA), I. H. Park (SKKU) on behalf of a larger collaboration, report:
Following the detection of GRB 220218A by Swift (D'Elia et al. GCNC 31608), the BOOTES-2/TELMA 0.6m telescope automatically started to observe the GRB localization within 2 min after trigger at the BOOTES-2 station at IHSM La Mayora (Algarrobo Costa, Spain). But due to bad weather, no useful early images were obtained. Later on, the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) responded to this burst starting on Feb 19 at 02:53 UT (~4.4 hours after trigger) right after the twilight. In the co-added image (23 x 60 s exposures in the clear filter), no optical afterglow is detected within the Swift/BAT error region (D'Elia et al. GCNC 31608) down to 20.5 mag. This non-detection is consistent with the MASTER observation (Lipunov et al. GCNC 31607).
We thank the staff at La Mayora and Observatorio Astronomico Nacional in San Pedro Martir for their excellent support.
|