Gamma-ray Burst 040403

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE


TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sat 03 Apr 04 05:08:29 UT
NOTICE_TYPE:    INTEGRAL Wakeup
TRIGGER_NUM:    1720,   Sub_Num: 0
GRB_RA:         115.2266d {+07h 40m 54s} (J2000),
                115.3346d {+07h 41m 20s} (current),
                113.9511d {+07h 35m 48s} (1950)
GRB_DEC:        +68.2056d {+68d 12' 20"} (J2000),
                +68.1955d {+68d 11' 44"} (current),
                +68.3215d {+68d 19' 17"} (1950)
GRB_ERROR:      2.75 [arcmin, radius, statistical only]
GRB_INTEN:      14.76 [sigma]
GRB_TIME:       18496.04 SOD {05:08:16.04} UT
GRB_DATE:       13098 TJD;    94 DOY;   04/04/03
SC_RA:          104.45 [deg] (J2000)
SC_DEC:          73.17 [deg] (J2000)
SUN_POSTN:       12.69d {+00h 50m 46s}   +5.44d {+05d 26' 25"}
SUN_DIST:        89.59 [deg]
MOON_POSTN:     167.63d {+11h 10m 31s}  +10.04d {+10d 02' 26"}
MOON_DIST:       67.32 [deg]
GAL_COORDS:     147.59, 29.61 [deg] galactic lon,lat of the burst
ECL_COORDS:     103.15, 45.91 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.

red DSS finding chart ps-file
GCN notice #2560
D. Gotz, S. Mereghetti (IASF, Milano), J. Borkowski, M. Beck (ISDC) on behalf of the IBAS Localization Team, S. Shaw on behalf of the INTEGRAL Science data Centre (ISDC) and the INTEGRAL Science Working Team report:
A 35 s long GRB has been detected with the INTEGRAL Burst Alert System (IBAS) on April 3 at 05:08:08 UT. The GRB has been detected with IBIS/ISGRI in the 15-200 keV band. Its coordinates (J2000) are:
```
R.A. 07h 40m 55s
Dec. 68deg 12' 39''
```
with an uncertainty of 3 arcmin.
The preliminary peak flux in the 20-200 keV range is about 0.4 photons/cmsq/s (3 x 10^-8 erg/cmsq/s) (1 s integration time). From the preliminary spectral analysis this GRB seems to be X-ray rich.
Further analysis is underway.
This message can be cited.

GCN/BACODINE POSITION NOTICE

 
TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sat 03 Apr 04 07:42:04 UT 
NOTICE_TYPE:    INTEGRAL Offline
TRIGGER_NUM:    1720,   Sub_Num: 1
GRB_RA:         115.2304d {+07h 40m 55s} (J2000),
                115.3385d {+07h 41m 21s} (current),
                113.9548d {+07h 35m 49s} (1950)
GRB_DEC:        +68.2108d {+68d 12' 39"} (J2000), 
                +68.2007d {+68d 12' 03"} (current),
                +68.3267d {+68d 19' 36"} (1950)
GRB_ERROR:      2.10 [arcmin, radius, statistical only] 
GRB_INTEN:      14.76 [sigma]
GRB_TIME:       18496.04 SOD {05:08:16.04} UT 
GRB_DATE:       13098 TJD;    94 DOY;   04/04/03
SC_RA:          104.45 [deg] (J2000)
SC_DEC:          73.17 [deg] (J2000)
SUN_POSTN:       12.69d {+00h 50m 46s}   +5.44d {+05d 26' 25"}
SUN_DIST:        89.59 [deg]   
MOON_POSTN:     167.63d {+11h 10m 31s}  +10.04d {+10d 02' 26"}
MOON_DIST:       67.32 [deg]
GAL_COORDS:     147.58, 29.62 [deg] galactic lon,lat of the burst
ECL_COORDS:     103.15, 45.92 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.

GCN notice #2561
J. Moran, M. Nysewander, and D. Reichart report on behalf of the FUN GRB Collaboration:
We imaged the entire ~30 square arcminute error circle of the INTEGRAL GRB 040403 (Gotz et al., GCN 2560) with the 0.6-meter Morehead Observatory telescope beginning 70 minutes after the burst. We integrated in Rc for 4440 seconds under non-ideal conditions.
Visual comparison to the DSS/POSS2-Red reveals no obvious new source to our limiting magnitude (Rc ~ 19 mag).
GCN notice #2562
I. Khamitov, Z. Aslan, M. Parmaksizoglu (TUG), R. Burenin, M. Pavlinsky, R. Sunyaev (IKI), I. Bikmaev, N. Sakhibullin (KSU)
report:
We observed the entire error circle of INTEGRAL GRB 040403 (Gotz et al., GCN 2560) in R band, with 1.5-m Russian-Turkish Telescope RTT150 at Bakyrlytepe, Turkey. The observations were started at 17:22 UT and lasted for few hours under bad seeng conditions (2--3'') and bright moon. We detected no source brighter than R=21.0, which is variable for more than 0.2 mag.
This message may be cited.
GCN notice #2563
P. Tikkanen and A. Oksanen on behalf of Nyrola observatory GRB Team and AAVSO International High Energy Network report:
A 24 x 16 arcmin field covering the INTEGRAL error circle of GRB 040403 (GCN 2560) was imaged with the 0.4m SCT of the Nyrola Observatory starting at April 3, 2004 20:05 UT, 15.0 hours after the burst. Observation was taken under quite poor conditions, bright moonlight, northern lights and moderate seeing.
Total of 53 four minute Rc-exposures, exposure time of 12720 seconds, were sigma reject combined and compared against the Digitized Sky Survey (DSS2R).
No new objects brighter than DSS2 plate limit was detected, but some fainter objects were also present inside error circle. The faintest stars on the combined image are about Rc=20.4 (USNOA2.0 reference).
The combined image is available on web: http://nyrola.jklsirius.fi/grb/grb040403
Nyrola observatory wants to express gratitude to AAVSO for loaning the CCD camera and to Wihuri foundation for generous grants for the observatory.
The AAVSO International High Energy network is grateful for a generous grant from the Curry Foundation and to NASA for the financial support for the High Energy Workshops for Amateur Astronomers.
GCN notice #2564
Kuntal Mishra on behalf of the GRB team reports:
We observed the error circle of INTEGRAL GRB 040403 (Gotz et al., GCN 2560) in R band, with 1.0-m telescope at Nainital (India) on April 03, 2004 starting at 16:44 UT. We found no new source brighter than R = 19.5 when comparing with DSS-2 R-band chart (USNOA2.0 reference).
```
Ms.KUNTAL MISHRA (JRF)                email: kuntal@upso.ernet.in
STATE OBSERVATORY,                         : kuntal_mishra@yahoo.com
MANORA PEAK, NAINITAL                 Phone: (91-05942) 235136, 235583
UTTARANCHAL 263 129                   Fax  : (91-05942) 235126, 235053
INDIA.                                Gram : Astronomy
```
GCN notice #2565
V.Rumyantsev (CrAO) and A.Pozanenko (IKI) report:
We have obtained 10 unfiltered images (300 s exposure each) of the GRB040403 error box (D.Gotz et al., GCN 2560). The images were taken with the AT-64 telescope of Crimean Astrophysical observatory and cover the period UT 17:48:54 - 18:37:24 of April 3, 2004.
No afterglow candidate was found in comparison with DSS2. We estimated the limiting magnitudes of combined image (S/N=3) as following
```
Start time (UT)       telescope   exposure    limiting mag.
Apr. 03  17:48        AT-64     10x300 s      20.0
```
Combined image can be found at http://grb.rssi.ru/GRB040403/
This message can be cited.
GCN notice #2571
GRB 040403, deep optical observations
A. de Ugarte, A. Sota, J. Gorosabel and A. J. Castro-Tirado (Instituto de Astrof=EDsica de Andaluc=EDa, IAA-CSIC, Granada), and J. M. Castro Cer=F3n (STScI, Baltimore)
communicate:
"We observed the field of the X-ray rich GRB 040403 detected by INTEGRAL (GCN Circ. 2560, Gotz et al.) starting on 3 Apr 2004 (20:00 UT) with the 1.5 m telescope at the Observatorio de Sierra Nevada in Granada. Imagery was obtained in the R- band (6 x 600 s). Comparison images were adquired on 4 and 20 Apr 2004 (9 x 600 s). No optical variable source is detected within the 3' radius error box provided by IBIS/IGRIS down to a limiting magnitude of 22.2 (3 sigma) 15 hr after the event. This might be indicative of a dark GRB."
This message may be cited.

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Jochen Greiner, last update: 22-Apr-2004 [Disclaimer]