Gamma-ray Burst 220218A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 18 Feb 22 22:30:15 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1093860,   Seg_Num: 0
GRB_RA:          133.830d {+08h 55m 19s} (J2000),
                 134.169d {+08h 56m 41s} (current),
                 133.063d {+08h 52m 15s} (1950)
GRB_DEC:         +31.984d {+31d 59' 02"} (J2000),
                 +31.898d {+31d 53' 54"} (current),
                 +32.175d {+32d 10' 31"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1598 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
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:        19628 TJD;    49 DOY;   22/02/18
GRB_TIME:        80939.35 SOD {22:28:59.35} UT
GRB_PHI:          19.00 [deg]
GRB_THETA:        13.20 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.61 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0 +89  +0 
SUN_POSTN:       332.33d {+22h 09m 19s}  -11.38d {-11d 22' 53"}
SUN_DIST:        153.52 [deg]   Sun_angle= -10.8 [hr] (East of Sun)
MOON_POSTN:      179.01d {+11h 56m 03s}   +5.19d {+05d 11' 19"}
MOON_DIST:        49.66 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      192.40, 39.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      127.26, 14.04 [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 = 53.66,18.36 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 18 Feb 22 22:32:50 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1093860,   Seg_Num: 0
GRB_RA:          133.830d {+08h 55m 19s} (J2000),
                 134.169d {+08h 56m 41s} (current),
                 133.063d {+08h 52m 15s} (1950)
GRB_DEC:         +31.984d {+31d 59' 02"} (J2000),
                 +31.898d {+31d 53' 54"} (current),
                 +32.175d {+32d 10' 31"} (1950)
GRB_DATE:        19628 TJD;    49 DOY;   22/02/18
GRB_TIME:        80939.35 SOD {22:28:59.35} UT
TRIGGER_INDEX:   20000
GRB_PHI:          19.00 [deg]
GRB_THETA:        13.20 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.61 [sigma]
LC_URL:          sw01093860000msb.lc
SUN_POSTN:       332.33d {+22h 09m 20s}  -11.38d {-11d 22' 50"}
SUN_DIST:        153.52 [deg]   Sun_angle= -10.8 [hr] (East of Sun)
MOON_POSTN:      179.04d {+11h 56m 08s}   +5.18d {+05d 10' 42"}
MOON_DIST:        49.69 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      192.40, 39.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      127.26, 14.04 [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 = 53.66,18.36 [deg].

GCN Circular #31607
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gres, N.M. Budnev (Irkutsk State University, API),
B.L. Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH)
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB220218.94 (trigger No 1093860,08h 55m 19.20s , +31d 59m 02.4s, R=0.05) errorbox 8 sec after notice time and 93 sec after trigger time at 2022-02-18 22:30:33 UT, with upper limit up to 16.8 mag. The observations began at zenith distance = 65 deg. The sun altitude is -46.2 deg.
MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB220218.94 errorbox 32 sec after notice time and 117 sec after trigger time at 2022-02-18 22:30:56 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 29 deg. The sun altitude is -55.4 deg.
The galactic latitude b = 40 deg., longitude l = 193 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1887825
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     104 |         MASTER-SAAO | P\  |    20 | 16.5 |        
     127 |   MASTER-Kislovodsk |  P- |    20 | 15.1 |        
     141 |         MASTER-SAAO | P\  |    30 | 16.8 |        
     172 |   MASTER-Kislovodsk |  P- |    30 | 15.1 |        
     182 |         MASTER-SAAO | P\  |    30 | 16.8 |        
     227 |   MASTER-Kislovodsk |  P- |    40 | 15.9 |        
     230 |         MASTER-SAAO | P\  |    40 | 16.8 |        
```
The observation and reduction will continue. The message may be cited.
GCN Circular #31608
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 Circular #31613
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.

Back to JG's homepage

Jochen Greiner, last update: 19-Feb-2022 [Disclaimer]