Gamma-ray Burst 090529

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:29:16 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.474d {+14h 09m 54s} (J2000),
                 212.582d {+14h 10m 20s} (current),
                 211.901d {+14h 07m 36s} (1950)
GRB_DEC:         +24.437d {+24d 26' 13"} (J2000),
                 +24.393d {+24d 23' 34"} (current),
                 +24.673d {+24d 40' 21"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1732 [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:        14980 TJD;   149 DOY;   09/05/29
GRB_TIME:        51155.21 SOD {14:12:35.21} UT
GRB_PHI:          27.54 [deg]
GRB_THETA:        22.77 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    8.87 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -1  +0  +0 +54  +0
SUN_POSTN:        66.61d {+04h 26m 25s}  +21.70d {+21d 41' 47"}
SUN_DIST:        123.28 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.43d {+09h 21m 42s}  +14.02d {+14d 01' 11"}
MOON_DIST:        68.23 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.65, 72.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      200.29, 35.03 [deg] ecliptic lon,lat of the burst (or transien
t)
COMMENTS:        SWIFT-BAT GRB Coordinates.
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;
COMMENTS:        probably due to it occurring during a Malindi downlink session.
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 = 15.26,11.44 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:30:02 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.4677d {+14h 09m 52.24s} (J2000),
                 212.5754d {+14h 10m 18.10s} (current),
                 211.8950d {+14h 07m 34.80s} (1950)
GRB_DEC:         +24.4620d {+24d 27' 43.1"} (J2000),
                 +24.4178d {+24d 25' 04.2"} (current),
                 +24.6976d {+24d 41' 51.4"} (1950)
GRB_ERROR:       5.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.48e-09 [erg/cm2/sec]
GRB_SIGNIF:      7.81 [sigma]
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51352.30 SOD {14:15:52.30} UT,   197.1 [sec] since BAT Trigger Time
TAM[0-3]:        327.63 237.22 261.37 243.26
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        66.61d {+04h 26m 25s}  +21.70d {+21d 41' 47"}
SUN_DIST:        123.25 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.43d {+09h 21m 44s}  +14.02d {+14d 01' 00"}
MOON_DIST:        68.22 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.73, 72.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      200.27, 35.05 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.
COMMENTS:        The XRT position is 1.54 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:31:09 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.467d {+14h 09m 52s} (J2000)
POINT_DEC:       +24.440d {+24d 26' 25"} (J2000)
POINT_ROLL:      321.503d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51360.76 SOD {14:16:00.76} UT,   205.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.101
N_STARS:         12
X_OFFSET:        448 [pixels]
Y_OFFSET:        608 [pixels]
X_MAX:           1407 [pixels]
Y_MAX:           1567 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00353540000msufc0205.fits
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 48"}
SUN_DIST:        123.27 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.44d {+09h 21m 46s}  +14.01d {+14d 00' 45"}
MOON_DIST:        68.21 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.66, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:31:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.467d {+14h 09m 52s} (J2000)
POINT_DEC:       +24.440d {+24d 26' 25"} (J2000)
POINT_ROLL:      321.503d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51360.76 SOD {14:16:00.76} UT,   205.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.101
N_STARS:         12
X_OFFSET:        448 [pixels]
Y_OFFSET:        608 [pixels]
X_MAX:           1407 [pixels]
Y_MAX:           1567 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00353540000msufc0205.fits
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 48"}
SUN_DIST:        123.27 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.45d {+09h 21m 47s}  +14.01d {+14d 00' 39"}
MOON_DIST:        68.21 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.66, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:38:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.464d {+14h 09m 51s} (J2000)
POINT_DEC:       +24.439d {+24d 26' 21"} (J2000)
ROLL:            321.501d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  52037.69 SOD {14:27:17.69} UT,   882.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     265300042
X_OFFSET:        952 [pixels]
Y_OFFSET:        924 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1112
Y_GRB_POS:       1084
BINNING_INDEX:   1
IM_URL:          sw00353540000msuni0887.fits
SUN_POSTN:        66.61d {+04h 26m 27s}  +21.70d {+21d 41' 50"}
SUN_DIST:        123.26 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.51d {+09h 22m 03s}  +13.98d {+13d 59' 05"}
MOON_DIST:        68.16 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.65, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:31:09 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.467d {+14h 09m 52s} (J2000)
POINT_DEC:       +24.440d {+24d 26' 25"} (J2000)
POINT_ROLL:      321.503d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51360.76 SOD {14:16:00.76} UT,   205.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.101
N_STARS:         12
X_OFFSET:        448 [pixels]
Y_OFFSET:        608 [pixels]
X_MAX:           1407 [pixels]
Y_MAX:           1567 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00353540000msufc0205.fits
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 48"}
SUN_DIST:        123.27 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.44d {+09h 21m 46s}  +14.01d {+14d 00' 45"}
MOON_DIST:        68.21 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.66, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:30:34 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.474d {+14h 09m 54s} (J2000),
                 212.582d {+14h 10m 20s} (current),
                 211.901d {+14h 07m 36s} (1950)
GRB_DEC:         +24.437d {+24d 26' 13"} (J2000),
                 +24.393d {+24d 23' 34"} (current),
                 +24.673d {+24d 40' 21"} (1950)
GRB_DATE:        14980 TJD;   149 DOY;   09/05/29
GRB_TIME:        51155.21 SOD {14:12:35.21} UT
TRIGGER_INDEX:   20000
GRB_PHI:          27.54 [deg]
GRB_THETA:        22.77 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    8.87 [sigma]
LC_URL:          sw00353540000msb.lc
SUN_POSTN:        66.61d {+04h 26m 25s}  +21.70d {+21d 41' 47"}
SUN_DIST:        123.28 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.44d {+09h 21m 45s}  +14.01d {+14d 00' 53"}
MOON_DIST:        68.22 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.65, 72.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      200.29, 35.03 [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 = 15.26,11.44 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:33:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.467d {+14h 09m 52s} (J2000)
POINT_DEC:       +24.440d {+24d 26' 25"} (J2000)
ROLL:            321.503d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51360.76 SOD {14:16:00.76} UT,   205.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     265299365
X_OFFSET:        953 [pixels]
Y_OFFSET:        925 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1113
Y_GRB_POS:       1085
BINNING_INDEX:   1
IM_URL:          sw00353540000msuni0210.fits
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 49"}
SUN_DIST:        123.27 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.47d {+09h 21m 52s}  +14.00d {+14d 00' 10"}
MOON_DIST:        68.20 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.66, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:34:21 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.4682d {+14h 09m 52.36s} (J2000),
                 212.5759d {+14h 10m 18.22s} (current),
                 211.8955d {+14h 07m 34.91s} (1950)
GRB_DEC:         +24.4585d {+24d 27' 30.6"} (J2000),
                 +24.4143d {+24d 24' 51.6"} (current),
                 +24.6941d {+24d 41' 38.8"} (1950)
GRB_ERROR:       5.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51511.00 SOD {14:18:31.00} UT,   355.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 49"}
SUN_DIST:        123.25 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.47d {+09h 21m 54s}  +14.00d {+14d 00' 01"}
MOON_DIST:        68.19 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.72, 72.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      200.27, 35.05 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:33:14 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.467d {+14h 09m 52s} (J2000)
POINT_DEC:       +24.440d {+24d 26' 25"} (J2000)
ROLL:            321.503d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51360.76 SOD {14:16:00.76} UT,   205.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     265299365
X_OFFSET:        953 [pixels]
Y_OFFSET:        925 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1113
Y_GRB_POS:       1085
BINNING_INDEX:   1
IM_URL:          sw00353540000msuni0210.fits
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 49"}
SUN_DIST:        123.27 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.46d {+09h 21m 51s}  +14.00d {+14d 00' 16"}
MOON_DIST:        68.20 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.66, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:30:12 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.4677d {+14h 09m 52.2s} (J2000),
                 212.5754d {+14h 10m 18.1s} (current),
                 211.8950d {+14h 07m 34.8s} (1950)
GRB_DEC:         +24.4620d {+24d 27' 43.1"} (J2000),
                 +24.4178d {+24d 25' 04.2"} (current),
                 +24.6976d {+24d 41' 51.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       61 [cnts]
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51352.30 SOD {14:15:52.30} UT,   197.1 [sec] since BAT Trigger Time
CENTROID_X:      277.03,  raw= 277  [pixels]
CENTROID_Y:      275.34,  raw= 275  [pixels]
ROLL:            321.50 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -53.41
GRB_POS_XRT_Z:   -59.55
IMAGE_URL:       sw00353540000msxps_rw.img
SUN_POSTN:        66.61d {+04h 26m 25s}  +21.70d {+21d 41' 47"}
SUN_DIST:        123.25 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.43d {+09h 21m 44s}  +14.02d {+14d 00' 58"}
MOON_DIST:        68.22 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.73, 72.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      200.27, 35.05 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:30:20 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.4677d {+14h 09m 52.2s} (J2000),
                 212.5754d {+14h 10m 18.1s} (current),
                 211.8950d {+14h 07m 34.8s} (1950)
GRB_DEC:         +24.4620d {+24d 27' 43.1"} (J2000),
                 +24.4178d {+24d 25' 04.2"} (current),
                 +24.6976d {+24d 41' 51.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       61 [cnts]
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51352.30 SOD {14:15:52.30} UT,   197.1 [sec] since BAT Trigger Time
CENTROID_X:      277.03,  raw= 277  [pixels]
CENTROID_Y:      275.34,  raw= 275  [pixels]
ROLL:            321.50 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -53.41
GRB_POS_XRT_Z:   -59.55
IMAGE_URL:       sw00353540000msxps_rw.img
SUN_POSTN:        66.61d {+04h 26m 25s}  +21.70d {+21d 41' 47"}
SUN_DIST:        123.25 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.44d {+09h 21m 45s}  +14.02d {+14d 00' 56"}
MOON_DIST:        68.22 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.73, 72.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      200.27, 35.05 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:38:05 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     353540,   Seg_Num: 0
POINT_RA:        212.464d {+14h 09m 51s} (J2000)
POINT_DEC:       +24.439d {+24d 26' 21"} (J2000)
ROLL:            321.501d
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  52037.69 SOD {14:27:17.69} UT,   882.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     265300042
X_OFFSET:        952 [pixels]
Y_OFFSET:        924 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1112
Y_GRB_POS:       1084
BINNING_INDEX:   1
IM_URL:          sw00353540000msuni0887.fits
SUN_POSTN:        66.61d {+04h 26m 27s}  +21.70d {+21d 41' 50"}
SUN_DIST:        123.26 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.51d {+09h 22m 02s}  +13.99d {+13d 59' 09"}
MOON_DIST:        68.16 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.65, 72.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      200.28, 35.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 09 14:34:21 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     353540,   Seg_Num: 0
GRB_RA:          212.4682d {+14h 09m 52.36s} (J2000),
                 212.5759d {+14h 10m 18.22s} (current),
                 211.8955d {+14h 07m 34.91s} (1950)
GRB_DEC:         +24.4585d {+24d 27' 30.6"} (J2000),
                 +24.4143d {+24d 24' 51.6"} (current),
                 +24.6941d {+24d 41' 38.8"} (1950)
GRB_ERROR:       5.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14980 TJD;   149 DOY;   09/05/29
IMG_START_TIME:  51511.00 SOD {14:18:31.00} UT,   355.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        66.61d {+04h 26m 26s}  +21.70d {+21d 41' 49"}
SUN_DIST:        123.25 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      140.47d {+09h 21m 54s}  +14.00d {+14d 00' 01"}
MOON_DIST:        68.19 [deg]
MOON_ILLUM:      33 [%]
GAL_COORDS:       28.72, 72.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      200.27, 35.05 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.

GCN Circular #9430
T. Sakamoto (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), O. Godet (U Leicester), C. Gronwall (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB), R. Margutti (Univ Bicocca&OAB), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-IASFPA), M. H. Siegel (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 14:12:35 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 090529 (trigger=353540). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 212.474, +24.437 which is
```
   RA(J2000)  = 14h 09m 54s
   Dec(J2000) = +24d 26' 13"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve does not show anything but this is typical for an image trigger.
The XRT began observing the field at 14:15:52.3 UT, 197.1 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 212.46882, 24.45889 which is equivalent to:
```
   RA(J2000)  = 14h 09m 52.52s
   Dec(J2000) = +24d 27' 32.0"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 80 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.61e+20 cm^-2, Kalberla et al. 2005), with an excess column of 2.9 (+1.72/-1.51) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 1.48e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 205 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is T. Sakamoto (Taka.Sakamoto AT nasa.gov). 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/too.html.)
GCN Circular #9431
L.P. Xin, W.K. Zheng, Y. Urata, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng and J.Y. Hu on behalf of EAFON report:
We have observed GRB 090529 (Sakamoto et al. GCN 9430) with Xinglong TNT telescope from May 29, 14:36:54 (UT), 24.3 min after the burst. After combined 20*20s white band images and preliminary analysis, An new source was found in our combined image within the XRT errorbox. The brightness is estimated to be about R~19.4 mag derived from USNO-B1.0 R2 magnitude, at the mean time of 28 min since the trigger.
The observation is still going.
This message may be cited.
For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/
GCN Circular #9432
S. T. Holland (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC), P. Schady (MSSL-UCL), and T. Sakamoto (NASA/UMBC) report on the behalf of the Swift UVOT team:
The Swift/UVOT took a 150 s exposure of the field of GRB 090529 with its white filter starting 204 s after the BAT trigger (Sakamoto, et al., 2009, GCN Circ. 9430). The preliminary 3-sigma upper limit at the XRT position is white > 20.3. This upper limit has not been corrected for the expected Galactic extinction along the line of sight corresponding to a reddening of E_{B-V} = 0.02 mag (Schlegel, et al., 1998, ApJS, 500, 525). The photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
The non-detection in the white filter at 204 s, combined with the observation at 28 minutes of R ~ 19.4 (Xin, et al., 2009, GCN Circ. 9431) implies either that this afterglow is unusually red, or that it has brightened during the first half hour after the BAT trigger. Such a long brightening would be highly unusual (Oates, et al., 2009, MNRAS, 395, 450).
GCN Circular #9433
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 2467 s of XRT Photon Counting mode data and 3 UVOT images for GRB 090529, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 212.46850, +24.45919 which is equivalent to:
```
RA (J2000): 14h 09m 52.44s
Dec (J2000): +24d 27' 33.1"
```
with an uncertainty of 1.8 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, arXiv:0812.3662).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #9434
C. B. Markwardt (GSFC/UMD), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 090529 (trigger #353540) (Sakamoto, et al., GCN Circ. 9430). The BAT ground-calculated position is RA, Dec = 212.446, 24.450 deg which is
```
    RA(J2000)  =  14h 09m 47.1s
    Dec(J2000) = +24d 26' 58.5"
```
with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 83%.
The mask-weighted light curve shows that the burst was in progress when it came into the BAT field of view at ~T-50 sec, following a pre-planned slew. The detectable part of the light curve shows an exponentially falling rate, which some possible superimposed peaks at ~T-45, ~T-25 and ~T-15 sec. The count rate is down to background by T+50 seconds. Given that we did not observe the start of the burst, we can only provide a lower limit to T90: T90 (15-350 keV) is > 100 sec.
The time-averaged spectrum from T-49.0 to T+39.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.00 +- 0.3. The fluence in the 15-150 keV band is 6.8 +- 1.7 x 10-7 erg/cm2. The 1-sec peak photon flux measured from T-50.0 sec in the 15-150 keV band is 0.4 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/353540/BA/
GCN Circular #9435
P. Schady (MSSL-UCL), T. Sakamoto (NASA/UMBC), S. T. Holland (CRESST/GSFC/USRA) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift UVOT team:
The Swift/UVOT began settled observations of the field of GRB 090529 206s after the BAT trigger (Sakamoto et al., GCN Circ. 9430) and no new source was detected within the XRT position in the first white finding chart (fc) (Sakamoto et al., GCN Circ. 9430; Holland et al., GCN Circ. 9432). However, a new source is detected within the refined XRT error circle (Osborne et al., GCN Circ. 9433) in a second white finding chart, taken at 883s after the BAT trigger, as well as in a co-added b-band exposure at
```
RA (J2000)  14:09:52.56   =  212.46892 (deg)
Dec (J2000) +24:27:32.2   =  +24.45892 (deg)
```
with an estimated uncertainty of 0.7 arcsec (radius, 90% confidence, statistical + systematic). This source detection is consistent with the white band detection reported by Xin et al. (GCN Circ. 9431). We note that there is weak evidence that the source could be extended.
The magnitudes and 3-sigma upper limits for the observations currently available are as follows:
```
Filter      T_start(s)  T_stop(s)  Exp(s)   Mag/3-sigma UL

white_fc1     206        355        147        > 21.09
white_fc2     883        1032       147        20.81 +/- 0.22
white         1185       2587       175        21.55 +/- 0.31
v             363        2637       253        > 20.24
b             461        2564       233        20.97 +/- 0.36
b             2716	 2824       107        > 20.70
u             436        2691       253        > 20.87
uvw1          412        2667       156        > 20.60
uvm2          387        2661       253        > 20.20
uvw2          510        2594       253        > 20.65
```
The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998). The photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #9436
D. A. Kann, U. Laux and B. Stecklum (TLS Tautenburg) report:
We observed the optical afterglow (Xin et al., GCN 9431) of the Swift GRB 090529 (Sakamoto et al., GCN 9430) with the 1.34m Schmidt telescope of the Thueringer Landessternwarte Tautenburg, Germany. Observations began at twilight, which, together with the setting moon, caused an elevated sky background. Airmass was low and conditions were excellent until clouds came in during the last Rc image. We obtained 6 x 300 sec dithered images in the Ic band and 3 x 600 sec images in the Rc band. The afterglow is very faintly visible on several Ic frames, clearly visible on the first two Rc frames and hardly visible on the last Rc frame.
Using the USNOB1.0 catalog as a reference, we derive the following position (J2000) for the afterglow:
```
RA = 14:09:52.53
Dec. = +24:27:32.77
```
with an error of 0".5. This position lies 0".7 from the UVOT position (Schady et al., GCN 9435), in full agreement with it.
We find several sources of roughly similar magnitude within 10" of the afterglow. These may slightly affect the photometry.
To calibrate, we use the isolated star with USNO catalog # 1144-0210566 at position
```
RA = 14:09:47.50
Dec. = +24:27:44.5
```
which has R2 = 18.32 mag and I = 17.54 mag. (Note that it is 0.54 mag brighter in R1.)
We derive the following magnitudes 0.3 days after the GRB:
```
time (d)	Mag	dMag	Exposure	Filter

0.287871	20.98	0.13	6 x 300		Ic
0.304668	21.39	0.12	1 x 600		Rc
0.312191	21.40	0.12	1 x 600		Rc
0.319703	21.47	0.35	1 x 600		Rc
```
Compared to the magnitude found by Xin et al., GCN 9431, this indicates the afterglow has faded by two magnitudes. The normal Rc - Ic color as well as the confirmation by Swift UVOT of a rising afterglow (Schady et al., GCN 9435) implies that it is not overly reddened, an alternate explanation by Holland et al., GCN 9432.
No further observations are planned.
This message may be cited.
GCN Circular #9437
M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:
We observed the optical afterglow (Xin et al. GCN 9431) of the Swift GRB 090529 (Sakamoto et al. GCN 9430) with the Z-600 telescope of Mt.Terskol observatory in R-filter between (UT) May 29 19:40 -- 20:20. In a combined image (20x120 s) we clearly detect the afterglow at the position (J2000) RA=14 09 52.55 Dec=+24 27 31.2 which is comparable with the afterglow position (Schady et al. GCN 9435, Kann et al. GCN 9436). The combined image finding chart can be found at http://grb.rssi.ru/GRB090529/GRB090529_Z600.JPG The photometry of the afterglow is undergoing.
GCN Circular #9448
J. Gorosabel (IAA-CSIC), A. de Ugarte Postigo (ESO, Santiago), F.J. Aceituno (OSN, IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), report on behalf of a larger collaboration:
"We carried out R-band observations of the GRB 090529 XRT error circle (Sakamoto et al. GCN 9430; Osborne et al. GCN 9433) with the 1.5m OSN telescope. On May 29.87-29.93 UT (0.27-0.33 days afer the GRB) we detected the optical afterglow (Xin et al. GCN 9431) at R=21.44+/-0.06, against the same reference star used by Kann et al. (GCN 9436)."
This message can be quoted.
GCN Circular #9449
Sbarufatti B., Mangano V. (INAF-IASFPA) and T. Sakamoto (NASA/UMBC) report on behalf of the Swift Team:
We have analyzed the first eleven orbits of Swift-XRT data of GRB 090529 (trigger 353540; Sakamoto, et al., GCN Circ. 9430), comprising 148 s taken in Windowed Timing (WT) mode, from T+203 s to T+352 s, and 8.2 ks in Photon Counting (PC) mode from T+353 s to T+46.7 ks.
The best position for the X-ray afterglow is the XRT UVOT-enhanced position:RA, Dec = 212.46850, +24.45919 which is equivalent to:
```
RA (J2000): 14h 09m 52.44s
Dec (J2000): +24d 27' 33.1"
```
with an uncertainty of 1.8 arcsec (radius, 90% confidence), as given by Osborne, et al., GCN Circ 9433.
The 0.3-10 keV X-ray light curve is best fitted by a broken power-law wit early decay index -3.5+/-0.1, late decay index -0.7+/-0.2 and the break at (1100+180-140) s after the trigger. Faint flaring activity is detected along the decay. If decaying at the present rate, the predicted rate for T+ 48h is 2.8e-3 counts/s. However, we remark that a second break followed by a steepening of the light-curve is expected. The issue will be clarified when new data from the Swift observations (resumed today at 14:35 UT) will be available.
The average spectrum of the steep decay part of the afterglow (WT + PC from T+203s to T+1.1 ks) is best fit by a power-law with indices 2.5+/-0.12 for the WT data and 2.2+/-0.15 for the PC data. The absorbing column is NH = (2.3-1.5+1.7)E20 cm^-2 slightly in excess with respect to the Galactic value of 1.61E20 cm^-2 (Kalberla et al. 2005). The average observed (unabsorbed) fluxes are 4.5(5.1)E-10 ergs cm^-2 s^-1 for the WT data and 1.5(1.6)E-11 for the PC data. The average spectrum of the flat decay part of the afterglow, consisting of 7.5 ks of PC data, observed from T+1.1 ks to T+46.7 ks (containing 120 photons) was fitted using Cash statistics with an absorbed power-law model. The absorbing column NH is (9 -7 +9)E20 cm^-2, consistent with the Galactic value, the photon index is 2.3+/-0.5. The observed (unabsorbed) flux is 5.3(7.2)E-13 ergs cm^-2 s^-1. The C-statistic is 66.4 with 101 bins. The count-rate to flux conversion factor is 4.7E-11. All quoted errors are at 90% confidence level.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00353540.
This circular is an official product of the Swift-XRT team.
GCN Circular #9453
G. Leloudas, D. Malesani, D. Xu, J.P.U. Fynbo (DARK/NBI), P. Jakobsson (Univ. Iceland), M. E. Brown (Caltech), E.L. Schaller (Univ. Hawaii) and T. Liimets (NOT & Tartu Obs.) report on behalf of a larger collaboration:
We observed the field of GRB 090529 (Sakamoto et al., GCN 9430) with the Nordic Optical Telescope equipped with MOSCA. 3x600s R-band frames were obtained starting on May 30, 21:22 UT, 1.29 days after the GRB.
The optical afterglow (Xin et al., GCN 9431; Schady et al., GCN 9435) is well detected in our images. Using the same reference star as in Kann et al. (GCN 9436), we obtain R=22.5 for the afterglow.
Comparison with the measurement by Kann et al., taken 0.3 days after the GRB, provides a decay index alpha = 0.72, assuming a power-law F (t) propto t^-alpha.
GCN Circular #9457
D. Malesani, J. P. U. Fynbo, (DARK/NBI), V. D'Elia (INAF/OAR), A. de Ugarte Postigo (ESO), P. Jakobsson (U. Iceland), C. C. Thoene (INAF/OAB), report on behalf of a larger collaboration:
Using FORS2 on the ESO Very Large Telescope, we have obtained low-resolution spectra (2 x 30 min) of the optical afterglow of GRB 090529 (Sakamoto et al., GCN 9430; Xin et al., GCN 9431) with the grism 300V, covering the wavelength range 3500-9200 AA. In the acquisition image the afterglow has a magnitude of R ~ 22.60 +-0.05. The first spectrum was taken starting on May 31.0778 UT (1.48 days after the GRB).
In a preliminary analysis we detect strong absorption around 4416 AA which we interpret as Lyman-alpha at a redshift of z = 2.63. This value is supported by the detection of several metal absorption features, e.g., SiII 1526, CII 1335, SiII 1402 and CIV 1549, all at the common z=2.625, which we interpret as the redshift of the GRB.
We thank the Paranal staff for excellent support, in particular Thomas Szeifert, Alain Smette, and Karla Aubel. We are also grateful to Lipin Xin for providing us with a finding chart.
GCN Circular #9467
M. Yoshida, D. Kuroda, K. Yanagisawa, Y. Shimizu, S. Nagayama, H. Toda (OAO, NAOJ) and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 090529 (Sakamoto et al. GCN 9430) with optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2009-05-29 14:51:47 UT. We found a faint source at the UVOT position reported by Schady et al. (GCN 9435) in g' band.
Photometric results are listed below. We used USNO B1 catalog for flux calibration.
```
#PDAY      MID-UT   T-EXP     g'   g'_err     Rc      Ic
----------------------------------------------------------
0.03564  15:03:55  1200sec   20.3   0.4     >19.7   >18.9
----------------------------------------------------------
```
GCN Circular #9482
D. Xu, G. Leloudas, D. Malesani, J. P. U. Fynbo, J. Maund (DARK/NBI), P. Jakobsson (Univ. Iceland), and T. Liimets (NOT & Tartu Obs.) report on behalf of a larger collaboration:
We continued to observe the field of GRB 090529 (Sakamoto et al., GCN 9430) with the Nordic Optical Telescope equipped with ALFOSC. We obtained 3x600 s R-band frames staring on June 01, 21:26:31 UT and ending on June 01, 22:00:52 UT. The mid-exposure time is 3.31 days after the burst.
The optical afterglow (Xin et al., GCN 9431; Schady et al., GCN 9435) is still detected in the stacked frame. Using the same reference star as in Kann et al. (GCN 9436) and in Leloudas et al. (GCN 9453), we obtain R=22.8+/-0.1 for the afterglow.
Measurements by Kann et al. (0.3 day after the burst) and Leloudas et al. (1.29 days after the burst) indicate an optical power-law decay index of alpha1=0.72. Our new observation indicates that the optical decay became even slower, with an index of alpha2=0.3 between our two obs epochs. In contrast, during the whole period of 0.3 - 3.31 days the X-ray afterglow decays with the index of ~1.0 (ref, Evans et al. 2009). The slow optical decay may be also due to the presence of a fairly bright host galaxy.
Further optical observations are encouraged. LI> GCN Circular #9485
S. Balman (METU), M. Parmaksizoglu (TUG) Z. Eker (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.) I. Bikmaev, N. Sakhibullin (KSU/AST) R. Burenin, M. Pavlinsky, R. Sunyaev (IKI),
report:
We observed the field of GRB090529 (trigger=353540, Sakamato et al. 2009 GCN Circ. 9430, also GCN Circ. 9431-9436,9448,9449,9457) with the Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey) on 30 May starting at 00:09:01.86 UT about 9.94 hours (0.414 d) after the burst using the TFOSC CCD (burst detected at 14:12:35 UT with Swift Burst Alert Telescope (BAT)).
We obtained one 900 sec exposure using the R band filter (Bessell filter). We found the afterglow candidate at the location designated by the Swift XRT position given by Osborne et al. 2009 GCN Circ. 9433. We performed PSF photometry using DAOPHOT within MIDAS software on the 13.3 by 13.3 arcmin field around the afterglow candidate. We calibrated the R band magnitude using the same USNO-B1 reference star noted by Kann et al. 2009 GCN Circ. 9436. The GRB090529 afterglow candidate is detected at R = 21.2+/-0.2 mag.
This message can be cited.
GCN Circular #9610
M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:
We report a photometry of the optical afterglow (Xin et al. GCN 9431) of the Swift GRB 090529 (Sakamoto et al. GCN 9430) observed with the Z-600 telescope of Mt.Terskol observatory in R-filter (Andreev et al, GCN 9437). The photometry is based on reference star USNO-B1.0 1144-0210607 (J2000) 14 09 58.32 +24 27 35.6), assuming R=16.46:
```
T0+     Filter, Exposure, mag.,
(d)             (s)

0.2420 R 20x120  21.13 +/- 0.2
```
GCN Circular #9611
A. Volnova (SAI MSU), K. Naumov, V. Kouprianov, A. Devyatkin (Pulkovo Observatory), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 090529 (Sakamoto et al. GCN 9430) with MTM-500 (0.5m) telescope of Kislovodsk solar station (43d 44.77' N, 42d 31.42' W) of the Pulkovo observatory in two series in R-filter starting May 29 (UT) 19:58. We do not detect optical afterglow (Xin et al. GCN 9431). The upper limits of combined images based on USNO-B1.0 are following:
```
T0+     Filter, Exposure, mag.,
(d)             (s)

0.2817   R       60x60     > 19.3
0.3324   R       55x60     > 19.4
```
GCN Circular #9612
D. Shakhovkoy, V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 090529 (Sakamoto et al. GCN 9430) with AZT-11 telescope of CrAO between (UT) May 29 18:41 -- 19:42 under poor weather conditions. We do not detect optical afterglow (Xin et al. GCN 9431). Upper limit of a stacked image based on USNO-B1.0 star (RA=14 09 47.65 Dec=+24 27 44.30) assuming I=17.54 is following:
```
T0+      Filter, Exposure, mag.
(d)              (s)

0.2075   I       20x180    > 20.3 
```
GCN Report 225.1
GCN_Report 225.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_225_1.pdf by T. Sakamoto at GSFC/UMBC titled: "Final Results on Swift GRB 090529A"
1202.0347 from 3 Feb 12
L.P. Xin et al.: The shallow-decay phase in both optical and x-ray afterglows of Swift GRB 090529A: Energy injection into a wind-type medium?
The energy injection model is usually proposed to interpret the shallow-decay phase in Swift GRB X-ray afterglows. However, very few GRBs have simultaneous signatures of energy injection in their optical and X-ray afterglows. Here, we report optical observations of GRB 090529A from 2000 sec to $\sim10^6$ sec after the burst, in which an achromatic decay is seen at both wavelengths. The optical light curve shows a decay from 0.37 to 0.99 with a break at $\sim10^5$ sec. In the same time interval, the decay indices of the X-ray light curve changed from 0.04 to 1.2. Comparing these values with the closure relations, the segment after 3$\times10^{4}$ sec is consistent with the prediction of the forward shock in an ISM medium without any energy injection. The shallow-decay phase between 2000 to 3$\times10^{4}$ sec could be due to the external shock in a wind-type-like medium with an energy injection under the condition of $\nu_o < \nu_c < \nu_x$. However, the constraint of the spectral region is not well consistent with the multi-band observations. For this shallow-decay phase, other models are also possible, such as energy injection with evolving microphysical parameters, or a jet viewed off-axis,etc.

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Jochen Greiner, last update: 03-Feb-2012 [Disclaimer]