Gamma-ray Burst 130609A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:05:28 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     557782,   Seg_Num: 0
GRB_RA:          152.676d {+10h 10m 42s} (J2000),
                 152.863d {+10h 11m 27s} (current),
                 151.977d {+10h 07m 55s} (1950)
GRB_DEC:         +24.101d {+24d 06' 05"} (J2000),
                 +24.035d {+24d 02' 05"} (current),
                 +24.348d {+24d 20' 52"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2066 [cnts]    Image_Peak=158 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   121     E_range: 15-50 keV
BKG_INTEN:       22258 [cnts]
BKG_TIME:        11093.34 SOD {03:04:53.34} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16452 TJD;   160 DOY;   13/06/09
GRB_TIME:        11108.64 SOD {03:05:08.64} UT
GRB_PHI:         -127.34 [deg]
GRB_THETA:        18.74 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     16.43 [sigma]
IMAGE_SIGNIF:    9.68 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +1  +0  +0  +0 -37  +0 
SUN_POSTN:        77.46d {+05h 09m 49s}  +22.94d {+22d 56' 09"}
SUN_DIST:         68.25 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.02d {+05h 32m 05s}  +20.14d {+20d 08' 41"}
MOON_DIST:        64.17 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.52, 53.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      146.01, 12.00 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate 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 = 228.28,-19.60 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=392439913).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:05:56 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     392439913
GRB_RA:          150.240d {+10h 00m 58s} (J2000),
                 150.432d {+10h 01m 44s} (current),
                 149.524d {+09h 58m 06s} (1950)
GRB_DEC:         +28.190d {+28d 11' 24"} (J2000),
                 +28.125d {+28d 07' 30"} (current),
                 +28.431d {+28d 25' 51"} (1950)
GRB_ERROR:       10.34 [deg radius, statistical only]
DATA_SIGNIF:     6.90 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16452 TJD;   160 DOY;   13/06/09
GRB_TIME:        11110.69 SOD {03:05:10.69} UT
GRB_PHI:         178.00 [deg]
GRB_THETA:        15.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:        77.46d {+05h 09m 49s}  +22.94d {+22d 56' 09"}
SUN_DIST:         65.07 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       83.03d {+05h 32m 06s}  +20.14d {+20d 08' 40"}
MOON_DIST:        61.29 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      201.13, 52.43 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      142.40, 15.03 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=557782).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:05:35 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      44
TRIGGER_NUM:     392439913
GRB_RA:          146.383d {+09h 45m 32s} (J2000),
                 146.567d {+09h 46m 16s} (current),
                 145.700d {+09h 42m 48s} (1950)
GRB_DEC:         +15.217d {+15d 13' 00"} (J2000),
                 +15.154d {+15d 09' 16"} (current),
                 +15.448d {+15d 26' 51"} (1950)
GRB_ERROR:       16.00 [deg radius, statistical plus systematic]
GRB_INTEN:       90 [cnts/sec]
DATA_SIGNIF:     6.10 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        16452 TJD;   160 DOY;   13/06/09
GRB_TIME:        11110.69 SOD {03:05:10.69} UT
GRB_PHI:         135.00 [deg]
GRB_THETA:        20.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      1.82
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      75%  GRB
2nd_MOST_LIKELY:  12%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:        77.46d {+05h 09m 49s}  +22.94d {+22d 56' 09"}
SUN_DIST:         65.24 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:       83.02d {+05h 32m 06s}  +20.14d {+20d 08' 40"}
MOON_DIST:        60.41 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      218.60, 45.32 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      143.50,  1.62 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 170.72,-15.58 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=557782).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:06:22 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.692d {+10h 10m 46s} (J2000)
POINT_DEC:       +24.102d {+24d 06' 06"} (J2000)
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11175.47 SOD {03:06:15.47} UT,   66.8 [sec] since BAT Trigger Time
COUNTS:          14    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:08:40 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     557782,   Seg_Num: 0
GRB_RA:          152.676d {+10h 10m 42s} (J2000),
                 152.863d {+10h 11m 27s} (current),
                 151.977d {+10h 07m 55s} (1950)
GRB_DEC:         +24.101d {+24d 06' 05"} (J2000),
                 +24.035d {+24d 02' 05"} (current),
                 +24.348d {+24d 20' 52"} (1950)
GRB_DATE:        16452 TJD;   160 DOY;   13/06/09
GRB_TIME:        11108.64 SOD {03:05:08.64} UT
TRIGGER_INDEX:   121
GRB_PHI:         -127.34 [deg]
GRB_THETA:        18.74 [deg]
DELTA_TIME:      71.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.43 [sigma]
IMAGE_SIGNIF:    9.68 [sigma]
LC_URL:          sw00557782000msb.lc
SUN_POSTN:        77.46d {+05h 09m 50s}  +22.94d {+22d 56' 10"}
SUN_DIST:         68.24 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.05d {+05h 32m 12s}  +20.14d {+20d 08' 38"}
MOON_DIST:        64.14 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.52, 53.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      146.01, 12.00 [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 a rate 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 = 228.28,-19.60 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:09:22 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.691d {+10h 10m 46s} (J2000)
POINT_DEC:       +24.102d {+24d 06' 06"} (J2000)
POINT_ROLL:      286.278d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11178.69 SOD {03:06:18.69} UT,   70.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.982
N_STARS:         12
X_OFFSET:        555 [pixels]
Y_OFFSET:        458 [pixels]
X_MAX:           1514 [pixels]
Y_MAX:           1417 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00557782000msufc0070.fits
SUN_POSTN:        77.46d {+05h 09m 50s}  +22.94d {+22d 56' 10"}
SUN_DIST:         68.26 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.06d {+05h 32m 14s}  +20.14d {+20d 08' 38"}
MOON_DIST:        64.15 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.53, 53.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:09:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.691d {+10h 10m 46s} (J2000)
POINT_DEC:       +24.102d {+24d 06' 06"} (J2000)
POINT_ROLL:      286.278d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11178.69 SOD {03:06:18.69} UT,   70.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.982
N_STARS:         12
X_OFFSET:        555 [pixels]
Y_OFFSET:        458 [pixels]
X_MAX:           1514 [pixels]
Y_MAX:           1417 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00557782000msufc0070.fits
SUN_POSTN:        77.46d {+05h 09m 50s}  +22.94d {+22d 56' 10"}
SUN_DIST:         68.26 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.06d {+05h 32m 14s}  +20.14d {+20d 08' 38"}
MOON_DIST:        64.15 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.53, 53.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [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:     Sun 09 Jun 13 03:10:51 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.691d {+10h 10m 46s} (J2000)
POINT_DEC:       +24.102d {+24d 06' 06"} (J2000)
ROLL:            286.278d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11178.69 SOD {03:06:18.69} UT,   70.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     392439989
X_OFFSET:        874 [pixels]
Y_OFFSET:        777 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1034
Y_GRB_POS:       937
BINNING_INDEX:   1
IM_URL:          sw00557782000msuni0081.fits
SUN_POSTN:        77.46d {+05h 09m 50s}  +22.94d {+22d 56' 10"}
SUN_DIST:         68.26 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.07d {+05h 32m 17s}  +20.14d {+20d 08' 37"}
MOON_DIST:        64.14 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.53, 53.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [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:     Sun 09 Jun 13 03:10:59 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     557782,   Seg_Num: 0
GRB_RA:          152.6715d {+10h 10m 41.16s} (J2000),
                 152.8590d {+10h 11m 26.15s} (current),
                 151.9727d {+10h 07m 53.44s} (1950)
GRB_DEC:         +24.1335d {+24d 08' 00.6"} (J2000),
                 +24.0670d {+24d 04' 01.1"} (current),
                 +24.3800d {+24d 22' 48.1"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11190.00 SOD {03:06:30.00} UT,   81.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        77.46d {+05h 09m 50s}  +22.94d {+22d 56' 10"}
SUN_DIST:         68.23 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.07d {+05h 32m 17s}  +20.14d {+20d 08' 37"}
MOON_DIST:        64.11 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.47, 53.79 [deg] galactic lon,lat of the burst
ECL_COORDS:      145.99, 12.03 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
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.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:11:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.691d {+10h 10m 46s} (J2000)
POINT_DEC:       +24.102d {+24d 06' 06"} (J2000)
ROLL:            286.278d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11178.69 SOD {03:06:18.69} UT,   70.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     392439989
X_OFFSET:        874 [pixels]
Y_OFFSET:        777 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1034
Y_GRB_POS:       937
BINNING_INDEX:   1
IM_URL:          sw00557782000msuni0081.fits
SUN_POSTN:        77.46d {+05h 09m 50s}  +22.94d {+22d 56' 11"}
SUN_DIST:         68.26 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.07d {+05h 32m 17s}  +20.14d {+20d 08' 37"}
MOON_DIST:        64.14 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.53, 53.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [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:        All 4 attachments are included.

GCN Circular #14828
J. R. Cummings (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC), N. Gehrels (NASA/GSFC), H. A. Krimm (CRESST/GSFC/USRA), D. Malesani (DARK/NBI), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), D. M. Palmer (LANL), M. H. Siegel (PSU) and C. A. Swenson (PSU) report on behalf of the Swift Team:
At 03:05:08 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130609A (trigger=557782). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 152.676, +24.101 which is
```
   RA(J2000) = 10h 10m 42s
   Dec(J2000) = +24d 06' 05"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 10 sec. The peak count rate was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 03:06:15.4 UT, 66.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 152.67159, 24.13359 which is equivalent to:
```
   RA(J2000)  = 10h 10m 41.18s
   Dec(J2000) = +24d 08' 00.9"
```
with an uncertainty of 3.9 arcseconds (radius, 90% containment). This location is 118 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. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (2.67 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.4 (+2.79/-2.37) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 70 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 none of the XRT error circle. 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 0.03.
Burst Advocate for this burst is J. R. Cummings (jayc AT milkyway.gsfc.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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:16:52 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.695d {+10h 10m 47s} (J2000)
POINT_DEC:       +24.103d {+24d 06' 11"} (J2000)
POINT_ROLL:      286.282d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11390.90 SOD {03:09:50.90} UT,   282.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.154
N_STARS:         13
X_OFFSET:        315 [pixels]
Y_OFFSET:        218 [pixels]
X_MAX:           1754 [pixels]
Y_MAX:           1657 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00557782000msufc0282.fits
SUN_POSTN:        77.46d {+05h 09m 51s}  +22.94d {+22d 56' 12"}
SUN_DIST:         68.25 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.12d {+05h 32m 29s}  +20.14d {+20d 08' 33"}
MOON_DIST:        64.09 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.52, 53.81 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 09 Jun 13 03:17:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.695d {+10h 10m 47s} (J2000)
POINT_DEC:       +24.103d {+24d 06' 11"} (J2000)
POINT_ROLL:      286.282d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11390.90 SOD {03:09:50.90} UT,   282.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.154
N_STARS:         13
X_OFFSET:        315 [pixels]
Y_OFFSET:        218 [pixels]
X_MAX:           1754 [pixels]
Y_MAX:           1657 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00557782000msufc0282.fits
SUN_POSTN:        77.46d {+05h 09m 51s}  +22.94d {+22d 56' 12"}
SUN_DIST:         68.25 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.13d {+05h 32m 30s}  +20.14d {+20d 08' 32"}
MOON_DIST:        64.09 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.52, 53.81 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [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:     Sun 09 Jun 13 03:18:14 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.695d {+10h 10m 47s} (J2000)
POINT_DEC:       +24.103d {+24d 06' 11"} (J2000)
ROLL:            286.282d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11390.90 SOD {03:09:50.90} UT,   282.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     392440201
X_OFFSET:        874 [pixels]
Y_OFFSET:        777 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1034
Y_GRB_POS:       937
BINNING_INDEX:   1
IM_URL:          sw00557782000msuni0293.fits
SUN_POSTN:        77.47d {+05h 09m 52s}  +22.94d {+22d 56' 12"}
SUN_DIST:         68.25 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.13d {+05h 32m 32s}  +20.14d {+20d 08' 32"}
MOON_DIST:        64.08 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.52, 53.81 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [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:     Sun 09 Jun 13 03:18:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     557782,   Seg_Num: 0
POINT_RA:        152.695d {+10h 10m 47s} (J2000)
POINT_DEC:       +24.103d {+24d 06' 11"} (J2000)
ROLL:            286.282d
IMG_START_DATE:  16452 TJD;   160 DOY;   13/06/09
IMG_START_TIME:  11390.90 SOD {03:09:50.90} UT,   282.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     392440201
X_OFFSET:        874 [pixels]
Y_OFFSET:        777 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1034
Y_GRB_POS:       937
BINNING_INDEX:   1
IM_URL:          sw00557782000msuni0293.fits
SUN_POSTN:        77.47d {+05h 09m 52s}  +22.94d {+22d 56' 12"}
SUN_DIST:         68.25 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       83.14d {+05h 32m 33s}  +20.14d {+20d 08' 31"}
MOON_DIST:        64.08 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      208.52, 53.81 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      146.02, 12.01 [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:        All 4 attachments are included.

GCN Circular #14830
D. A. Perley (Caltech) and S. B. Cenko (GSFC) report:
The Palomar 60-inch telescope automatically responded to GRB 130609A (Cummings et al., GCN 14828) and began taking observations at 04:03:23 UT (58.25 minutes after the BAT trigger) as soon as the sky became dark. A sequence of cycled 60-second r, i, and z images was acquired. We detect no source consistent with the XRT localization in either individual images or in combined stacks of the first 6 images in each filter. Approximate 5-sigma limiting magnitudes from the combined images at an approximate mean time of 4:20 UT (75 minutes after the GRB trigger) are:
```
r > 22.5
i > 21.5
z > 20.9
```
These limits are suggestive of a dark GRB. Cummings et al. report a detection of significant excess absorption in the XRT spectrum, which may indicate a dust-extinguished (as opposed to high-redshift) event, although given the quoted errors there the excess may be only marginal.
NIR follow-up is highly encouraged.
GCN Circular #14831
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), Willia= m H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB) J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UCSC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC)= , Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes=FAs Gonz=E1lez (UN= AM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley= (GSFC) report:
We observed the field of GRB 130609A (Cummings, et al., GCN 14828) with t= he Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional = on Sierra San Pedro M=E1rtir from 2013/06 9.15 to 2013/06 9.23 UTC (0.56 to = 2.52 hours after the BAT trigger), obtaining a total of 1.24 hours exposure in the r' and i' bands and 0.60 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle, in comparison with SDSS D= R9 and 2MASS, we obtain the following upper limits (3-sigma):
```
  r'    > 23.34
  i'    > 23.27
  Z     > 22.39
  Y     > 21.91
  J     > 21.72
  H     > 21.06
```
These magnitudes are in the AB system and not corrected for Galactic extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedr= o M=E1rtir.
GCN Circular #14834
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (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 130609A (trigger #557782) (Cummings, et al., GCN Circ. 14828). The BAT ground-calculated position is RA, Dec = 152.680, 24.124 deg which is
```
    RA(J2000)  =  10h 10m 43.2s
    Dec(J2000) = +24d 07' 27.1"
```
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 87%.
The mask-weighted light curve shows a single FRED peak. T90 (15-350 keV) is 7.0 +- 0.8 sec (estimated error including systematics).
The time-averaged spectrum from T-1.19 to T+7.28 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.88 +- 0.11. The fluence in the 15-150 keV band is 5.7 +- 0.4 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+0.52 sec in the 15-150 keV band is 1.8 +- 0.2 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/557782/BA/
GCN Circular #14835
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 3372 s of XRT Photon Counting mode data and 4 UVOT images for GRB 130609A, 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 = 152.66941, +24.13195 which is equivalent to:
```
RA (J2000): 10h 10m 40.66s
Dec (J2000): +24d 07' 55.0"
```
with an uncertainty of 2.3 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, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #14837
J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A. Maselli (INAF-IASFPA), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU) and J.R. Cummings report on behalf of the Swift-XRT team:
We have analysed 10 ks of XRT data for GRB 130609A (Cummings et al. GCN Circ. 14828), from 52 s to 23.5 ks after the BAT trigger. The data comprise 8 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 14835).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.79 (+/-0.06).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.6 (+0.4, -0.3). The best-fitting absorption column is 3.3 (+1.0, -0.9) x 10^21 cm^-2, in excess of the Galactic value of 2.7 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.2 x 10^-11 (7.9 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     3.3 (+1.0, -0.9) x 10^21 cm^-2
Galactic foreground: 2.7 x 10^20 cm^-2
Excess significance: 5.4 sigma
Photon index:	     2.6 (+0.4, -0.3)
```
If the light curve continues to decay with a power-law decay index of 0.79, the count rate at T+24 hours will be 3.5 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-13 (2.8 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00557782.
This circular is an official product of the Swift-XRT team.
GCN Circular #14839
G. Fitzpatrick (UCD) and J. Michael Burgess (UAH) report on behalf of the Fermi GBM Team:
At 03:05:10.69 UT on 09 June 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 130609A (trigger 392439913 /130609129), which was also detected by the Swift/BAT (Cummings et al., GCN Circ. 14828). The GBM on-ground location is consistent with the Swift position.
The GBM light curve consists of a single peak with a duration (T90) of about 5 s (50-300 keV). The time-averaged spectrum from T0-2.6 s to T0+2.8 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -1.2 +/- 0.2 and the cutoff energy, parameterized as Epeak, is 59.5 +/- 7.3 keV.
The event fluence (10-1000 keV) in this time interval is (7.7 +/- 0.6)E-07 erg/cm^2. The 1-sec peak photon flux measured starting from T0-1.6 s in the 8-1000 keV band is 3.2 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog.
GCN Circular #14863
B. A. Zauderer, W. Fong, E. Berger and T. Laskar (Harvard) report on behalf of the CARMA Key Project, "A Millimeter View of the Transient Universe" and a larger collaboration:
"We observed the position of GRB 130609A (Cummings et al. GCN 14828; also detected by Fitzpatrick et al. GCN 14839) beginning 2013 Jun 9.88 UT (dt = 0.75 d) with the Very Large Array (VLA) and beginning 2013 Jun 10.05 UT (dt = 0.92 d) with the Combined Array for Research in Millimeter Astronomy (CARMA). For this dark burst with deep optical and NIR afterglow upper limits (e.g. Perley et al. GCN 14830 and Butler et al. GCN 14831), we find no significant radio emission at the enhanced Swift-XRT position (Evans et al.; GCN 14835) with the following three-sigma upper limits:
```
 5.8  GHz  <35 uJy  (VLA)
21.8  GHz  <60 uJy  (VLA)
84.5  GHz   <0.36 mJy (CARMA).
```
We thank the VLA and CARMA staff and observers for their support of these observations."
GCN Circular #14871
S. T. Holland (STScI) and J. R. Cummings (NASA/UMBC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130609A starting 70 s after the BAT trigger (Cummings et al. 2013, GCNC 14828). We do not detect any new source consistent with the UVOT-enhanced XRT position (Evans 2013, GCNC 14835) in any of the UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the finding chart (FC) exposures and initial summed exposures are presented below.
```
Filter      TSTART      TSTOP   Exposure      Mag
-------------------------------------------------
white (FC)      70        220        147    >21.0
               562        582         19    >19.8
u (FC)         282        532        246    >20.3
               686        706         19    >18.6
-------------------------------------------------
v              612       6212        413    >19.9
b              537     18,175       1773    >21.7
u             5191     23,545       2254    >21.4
uvw1          4987     23,257       2164    >21.5
uvm2          4782     22,351       1279    >21.3
uvw2          4372       6007        393    >20.8
white         4166     12,406       1022    >22.0
-------------------------------------------------
```
The quoted upper limits have not been corrected for the expected extinction due to the Galactic reddening along the line of sight to this burst of E(B-V) = 0.03 mag (Schlafly et al. 2011, ApJS, 737, 103).

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Jochen Greiner, last update: 11-Jun-2013 [Disclaimer]