[vsnet-grb 291919] GCN/SWIFT_XRT_POSITION_NACK

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 21 May 16 20:24:37 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     687124,   Seg_Num: 0
POINT_RA:        293.731d {+19h 34m 56s} (J2000)
POINT_DEC:       +21.904d {+21d 54' 14"} (J2000)
IMG_START_DATE:  17529 TJD;   142 DOY;   16/05/21
IMG_START_TIME:  73453.77 SOD {20:24:13.77} UT,   31.7 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.