This file contains both GRB 060607 A and B. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5233 SUBJECT: GRB 060607: Swift detection of a burst with bright optical counterpart DATE: 06/06/07 05:43:28 GMT FROM: Jamie A. Kennea at PSU/Swift-XRT H. Z. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), M. R. Goad (U Leicester), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), K. M. McLean (LANL/UTD), S.R. Oates (UCL-MSSL), K. L. Page (U Leicester) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 05:12:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060607 (trigger=213823). Swift slewed immediately to the burst. The BAT on-board calculated location is RA,Dec 329.712, -22.506 {21h 58m 51s, -22d 30' 20"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 40 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 05:13:18 UT, 65 seconds after the BAT trigger. XRT found a bright, variable, uncatalogued X-ray source located at RA(J2000) = 21h 58m 50.1s, Dec(J2000) = -22d 29' 49.9", with an estimated uncertainty of 4.7 arcseconds (90% confidence radius). This location is 33 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 3.3e-09 erg/cm2/s (0.2-10 keV). UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 75 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at (RA,DEC) (J2000) of (329.7100,-22.4963) or (21h58m50.40s,-22o29'46.7") with a 1-sigma error radius of about 0.5 arc sec. This position is 4.7 arc sec. from the center of the XRT error circle. The estimated magnitude is 15.7 with a 1-sigma error of about 0.5 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5234 SUBJECT: GRB 060607: REM NIR afterglow DATE: 06/06/07 05:47:54 GMT FROM: Stefano Covino at Brera Astronomical Observatory S. Covino, E. Distefano, E. Molinari, G. Chincarini, F.M. Zerbi, V. Testa, G. Tosti, F. Vitali, P. Conconi, L.A. Antonelli, G. Cutispoto, G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs, and P. Goldoni report on behalf of the REM/ROSS team: We imaged the field of GRB 060607 (Ziaeepour et al. GCN 5233) the robotic 60-cm REM telescope located at La Silla (Chile. A first set of observations was performed automatically in the near infrared (J, H, K, z bands) starting on June 5:13:45UT. A preliminary analysis reveals an uncatalogued source of H ~ 13.3 at RA,DEC = (21:58:50.4, -22:29:47). Further observations are in progress. This message may be cited. [GCN OPS NOTE(07jun06): Per author's request the spelling of the second author's name was corrected.] //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5236 SUBJECT: GRB 060607: PROMPT Observations DATE: 06/06/07 06:15:38 GMT FROM: Melissa Nysewander at UNC,Chapel Hill M. Nysewander, J. Haislip report on behalf of the UNC GRB Team: PROMPT began observing the position of the XRT error circle (Ziaeepour et al., GCN 5233) 44 seconds after the GRB trigger, 25 seconds after the initial alert in Ugriz. We confirm the presence of the bright, fading optical afterglow: in our initial r' image, we find the source to be r' ~ 16.3 at a mean time of 65 seconds after the burst. It then brightened to r' ~ 16 at 90-s, and by 140-s it had risen to a magnitude of r' ~ 14.5. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5237 SUBJECT: VLT/UVES observations of GRB 060607 DATE: 06/06/07 07:08:07 GMT FROM: Paul Vreeswijk at ESO Cedric Ledoux (ESO), Paul Vreeswijk (U. of Chile/ESO), Alain Smette (ESO), Andreas Jaunsen (U. of Oslo), and Andreas Kaufer (ESO) report on behalf of a larger collaboration: "We triggered Rapid-Response Mode VLT observations with the Ultraviolet and Visual Echelle Spectrograph (UVES) following the Swift detection of GRB 060607 (Ziaeepour et al., GCN 5233). A series of exposures were started at 5:19:52 UT, i.e. 7.5 minutes after the Swift/BAT trigger. The spectra cover the approximate wavelength range 330-670nm at a resolving power of about 7 km/s. A preliminary analysis shows the Lya forest up to a rather weak Lya line, as well as a CIV doublet at a redshift of z=3.082, the presumed GRB redshift. We also detect two probable intervening Damped Lya systems (DLAs) at z=3.050 and z=2.937. It's a pleasure to thank the excellent support of the Paranal staff." //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5239 SUBJECT: GRB 060607: IR observations DATE: 06/06/07 12:49:58 GMT FROM: Daniel Perley at U.C. Berkeley D. Perley, N. Butler, and Y. Kemper (UCB) report: Starting at 2006-06-07 10:34 UT (5.37 hours after the trigger) we imaged the field of GRB060607 (GCN 5233) using the Lick 3m telescope equipped with the Gemini IR camera under high airmass conditions and intermittent clouds. We do not detect the afterglow (GCN 5233, GCN 5234) down to a preliminary limiting magnitude of J=17.2 (3 sigma) in a series of dithered exposures lasting 60 minutes. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5240 SUBJECT: GRB 060607: Swift-XRT Team refined analysis DATE: 06/06/07 13:10:12 GMT FROM: Kim Page at U.of Leicester Kim Page, Mike Goad & Andy Beardmore (U. Leicester) report on behalf of the Swift-XRT team: We have analysed the first 3 orbits of X-ray data obtained for GRB 060607 (BAT trigger 213823; Ziaeepour et al., GCN 5233). The data show 3 flares, superimposed on a decay of alpha_1 = 1.09 +/- 0.04. Around 740 seconds after the trigger, the slope flattens, becoming alpha_2 = 0.45 +/- 0.03. The flares in the WT data show spectral evolution. The later PC data are well-fitted by a single power-law with Gamma = 1.64 +/- 0.07, with excess NH above the Galactic value. Taking the redshift to be 3.082 (Ledoux et al; GCN 5237), the intrinsic NH is (7.9 +3.8/-3.5)e21 cm^-2. Assuming the shallow decay of alpha_2 = 0.37 continues, the count rate is estimated to be 0.49 count s^-1 at 24 hours. This corresponds to an observed (unabsorbed) flux of 2.22e-11 (2.44e-11) erg cm^-2 s^-1. This circular is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5241 SUBJECT: GRB 060607: optical limit by "Pi of the Sky" DATE: 06/06/07 13:39:01 GMT FROM: Grzegorz Wrochna at Soltan Inst.for Nuclear Studies M.Cwiok, W.Dominik, G.Kasprowicz, K.Malek, L.Mankiewicz, M.Molak, J.Mrowca-Ciulacz, K.Nawrocki, L.W.Piotrowski, P. Sitek, M.Sokolowski, J.Uzycki, G.Wrochna, on behalf of "Pi of the Sky" collaboration "Pi of the Sky" apparatus located at Las Campanas Observatory has moved to the Swift-BAT trigger 213823 and it has taken a series of 10s exposures starting 124s after the GRB (105s after the alert). No new object has been found within the Swift-BAT error box. The limiting magnitude is 12.5m (unfiltered) for single exposures and 13.4m for the sum of 10 images. More information at http://grb.fuw.edu.pl/pi/grb.htm //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5242 SUBJECT: GRB 060607: Swift-BAT Refined Analysis DATE: 06/06/07 19:41:47 GMT FROM: Hans Krimm at NASA-GSFC J. Tueller (GSFC), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), M. Koss (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), on behalf of the Swift-BAT team: Using the data set from T-119.6 to T+182.5 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060607 (trigger #213823) (Ziaeepour, et al., GCN 5233). The BAT ground-calculated position is (RA,Dec) = 329.712, -22.500 deg {21h 58m 50.8s, -22d 30' 0.0"} (J2000) +- 0.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 99%. The mask weighted light curve consists of two overlapping FRED peaks from T-5 sec to T+40 sec. There is a second double peaked structure between T+95 sec and T+105 sec. T90 (15-350 keV) is 100 +- 5 sec (estimated error including systematics). The time-averaged spectrum from T-14.1 to T+104.5 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.45 +- 0.07. The fluence in the 15-150 keV band is 2.6 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-0.97 sec in the 15-150 keV band is 1.4 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level. Using the redshift of 3.082 reported by Ledoux et al (GCN 5237) and a cosmology of Omega_M - 0.3, Omega_lamba = 0.7 H0 = 65, we find Eiso (1-1000 keV in the rest frame) to be 1.1 X 10^53 ergs. This is based on an extrapolation of the BAT power law fit into the corresponding observer energy band. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5243 SUBJECT: GCN 060607: Swift-UVOT obswervations. DATE: 06/06/07 23:43:44 GMT FROM: Samantha Oates at MSSL S. R. Oates (UCL-MSSL), A. J. Blustin (UCL-MSSL), H. Z. Ziaeepour (UCL-MSSL) report on behalf of the Swift/UVOT team: The Swift/UVOT began observing the field of GRB 060607 at 05:15:12 on 2006-06-06, 179 s after the BAT trigger (Ziaeepour et al., GCN 5233). An optical counterpart was detected in the V-band at a position (RA,DEC) (21h 58m 50.4s, -22d 29' 47.4'') (J2000) to within 0.5 arcsec. The optical afterglow was detected in white, V, B and U filters. The non-detections in the UV bands is consistent with reported redshift z=3 (Ledoux et al., GCN 5237). The photometry results are given for the 7 filters below: Filter T_Start(s) Exposure(s) Magnitude/3sig_UL V 179 486.9 15.35 +/-0.09 V 7880 127.1 18.16 +/-0.33 B 5833 194.9 19.13 +/-0.18 B 7265 192.5 19.48 +/-0.28 U 7061 187.8 18.87 +/-0.34 W1 5429 1257 18.83 (3 sigma UL) M2 6651 1075 20.47 (3 sigma UL) W2 1843 383.1 19.97 (3 sigma UL) WHITE 74 97.4 15.98 +/-0.15 WHITE 6037 188.4 18.89 +/-0.17 The values quoted above are not corrected for the expected Galactic extinction E(B-V)=0.03 //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5244 SUBJECT: GRB 060607B: Swift detection of a burst DATE: 06/06/07 23:47:08 GMT FROM: Hans Krimm at NASA-GSFC H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA), K. M. McLean (LANL/UTD) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 23:32:44 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060607B (trigger=213934). The BAT on-board calculated location is RA,Dec 42.033, +14.736 {02h 48m 08s, +14d 44' 09"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 25 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger. Swift did not slew to this burst due to the Sun constraint. Since this burst is only 33 degrees from the Sun, it will not be observable by the Swift narrow field instruments until June 24. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5246 SUBJECT: GRB 060607B: Swift-BAT Refined Analysis DATE: 06/06/08 21:12:40 GMT FROM: Hans Krimm at NASA-GSFC L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), M. Koss (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), on behalf of the Swift-BAT team: Using the data set from T-239.4 to T+250 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060607 (trigger #213934) (Krimm, et al., GCN 5244). The BAT ground-calculated position is (RA,Dec) = 42.048, 14.749 deg {2h 48m 11.6s, 14d 44' 57.1"} (J2000) +- 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 35%. The mask-weighted light curve shows a double-peaked structure with peaks at T+1 sec and T+9 sec. There is low-level emission out to T+30 sec. T90 (15-350 keV) is 31 +- 5 sec (estimated error including systematics). The time-averaged spectrum from T-0.8 to T+37.1 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.63 +- 0.12. The fluence in the 15-150 keV band is 1.7 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+8.64 sec in the 15-150 keV band is 1.5 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5248 SUBJECT: GRB 060607: RTT150 optical observations DATE: 06/06/09 12:50:33 GMT FROM: Irek Khamitov at TUG I. Khamitov (TUG), A.T. Saygac (Ist.Uni), Z. Aslan (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.) R. Burenin, M. Pavlinsky (IKI) I. Bikmaev, N. Sakhibullin (KSU/AST), report: We observed the field around the position of the optical/IR counterpart (Covino et al., GCN5234, Oates et al., GCN5243) of GRB060607 (Swift trigger 213823) with the Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey), at the beginning of June 08, about 19.77 hours after the burst. A series of frames was taken in R band with TFOSC. The afterglow is not detected on combined image with 1500s total exposure. http://www.tug.tubitak.gov.tr/~irekk/grb/grb060607/GRB060607_0608_RTT150.JPG Using USNO-B1 star we estimate the limiting R magnitude for the combined frame as R_lim~22.6 This message may be cited.