IGR J17464-3213 = XTE J17464-3213: X-ray nova

IGR J17464-3213 = XTE J17464-3213 (= H1743-322 ?): X-ray nova (X-ray transient)

Discovery by the INTEGRAL Satellite

New X-ray transient: IGR J17464-3213

According to ATEL #132, Revnivtsev et al. reported their detection of a new X-ray transient, IGR J17464-3213, with the INTEGRAL satellite.

The position of the source is R.A.=17h46.4m, Dec.=-32o13' (equinox 2000, position uncertainty 2').

They further reported that its spectrum suggests that the source may be a black hole candidate. Follow-up observations to search possible counterpart in other wavelengths are encouraged.

Regards,
Makoto Uemura

Detection as a "GRB" candidate

(from GCN Notices)

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 31 Mar 03 02:45:56 UT
NOTICE_TYPE:    INTEGRAL Wakeup
TRIGGER_NUM:    484,   Sub_Num: 0
GRB_RA:         266.5700d {+17h 46m 17s} (J2000),
                266.6229d {+17h 46m 29s} (current),
                265.7543d {+17h 43m 01s} (1950)
GRB_DEC:        -32.2394d {-32d 14' 21"} (J2000),
                -32.2405d {-32d 14' 25"} (current),
                -32.2208d {-32d 13' 14"} (1950)
GRB_ERROR:      4.32 [arcmin, radius, statistical only]
GRB_INTEN:      10.49 [sigma]
GRB_TIME:       9492.73 SOD {02:38:12.73} UT
GRB_DATE:       12729 TJD;    90 DOY;   03/03/31
SC_RA:          266.95 [deg] (J2000)
SC_DEC:         -27.85 [deg] (J2000)
SUN_POSTN:        9.17d {+00h 36m 41s}   +3.95d {+03d 57' 09"}
SUN_DIST:       102.72 [deg]
MOON_POSTN:     353.59d {+23h 34m 23s}   -7.95d {-07d 56' 55"}
MOON_DIST:       83.22 [deg]
GAL_COORDS:     357.25, -1.84 [deg] galactic lon,lat of the burst
ECL_COORDS:     267.06, -8.84 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 31 Mar 03 05:38:55 UT
NOTICE_TYPE:    INTEGRAL Offline
TRIGGER_NUM:    484,   Sub_Num: 1
GRB_RA:         266.5700d {+17h 46m 17s} (J2000),
                266.6229d {+17h 46m 29s} (current),
                265.7543d {+17h 43m 01s} (1950)
GRB_DEC:        -32.2394d {-32d 14' 21"} (J2000),
                -32.2405d {-32d 14' 25"} (current),
                -32.2208d {-32d 13' 14"} (1950)
GRB_ERROR:      -4.32 [arcmin, radius, statistical only]
GRB_INTEN:      10.49 [sigma]
GRB_TIME:       9492.73 SOD {02:38:12.73} UT
GRB_DATE:       12729 TJD;    90 DOY;   03/03/31
SC_RA:          266.95 [deg] (J2000)
SC_DEC:         -27.85 [deg] (J2000)
SUN_POSTN:        9.17d {+00h 36m 41s}   +3.95d {+03d 57' 09"}
SUN_DIST:       102.72 [deg]
MOON_POSTN:     353.59d {+23h 34m 23s}   -7.95d {-07d 56' 55"}
MOON_DIST:       83.22 [deg]
GAL_COORDS:     357.25, -1.84 [deg] galactic lon,lat of the burst
ECL_COORDS:     267.06, -8.84 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2038
SUBJECT: INTEGRAL GRB 030331
DATE:    03/03/31 03:06:19 GMT
FROM:    Krzysztof Z. Stanek at CfA

K. Z. Stanek (CfA):

The Schlegel et al. (1998) E(B-V) for this burst is very high, E(B-V) = 3.5, or A_R=9.3 mag.

This note does not need to be cited.

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2039
SUBJECT: 030331 NOT A GRB
DATE:    03/03/31 03:24:56 GMT
FROM:    Sandro Mereghetti at IASF/CNR

S.Mereghetti for the IBAS Localization Team communicates that the INTEGRAL Alert number 484 regarding a possible burst at 2003-03-31T02:38:12.7 is not due to a GRB.

The trigger was caused by the transient source IGR J17464-3213 = H1743-322

(Berto Monard's wide-field CCD image)

Berto Monard's Optical Observation

(vsnet-campaign-xray 212) [The object is definitely not a GRB, so avoid using the misassigned GRB name].

Date: Tue, 01 Apr 2003 13:26:38 +0200
From: "Berto Monard" 
Subject: [vsnet-alert 7677] GRB 030331 (?) / IGR J17464-3213 observation

Images (more than 200 of exposure time 45 sec each) of the field of the INTEGRAL transient IGR J17464-3213 were taken on 03/04/01 at the Bronberg Observatory (0.3m telescope +CCD camera) over the period UT 00 00 to 03 35.

Several brightened objects and at least one new bright object (within the given error circle)were visually detected on a stacked image by a quick comparison to DSS images of generation 1/visible and 2/red up to a magnitude of 17CR. No inspection vs IR images was possible yet.

More detailed inspection and eventual astrometry will follow when time will have been available to do so.

A stacked image could be composed to reach beyound 20CR if needed and differential photometry of reasonable precision will be possible on any counterpart brighter than magn 16CR.

This may be cited as a preliminary report.

Berto Monard / MLF
Bronberg Observatory / CBA Pretoria

(vsnet-campaign-xray 213)

Hello,

Apparently IGR J17464-3213's position is quite close to the catalogued position of the black-hole candidate transient H1743-322. In fact, there were more candidate positions for H1743-322, and one of them seems to be consistent with IGR J17464-3213 (I got this info from Ada Paizis at the ISDC, Geneva Switzerland).

If there's a new optical object in your FOV, than it would be very interesting to report this as an Astronomical Telegram or IAU Circular, since, to my knowledge, there has been no report of an optical counterpart of H1743-322 (or IGR J17464-3213).

Regards,

Erik Kuulkers

(vsnet-campaign-xray 214)

Date: Wed, 02 Apr 2003 15:02:22 +0200
From: "Berto Monard" 
Subject: [vsnet-alert 7679] IGR J17464-3213 / update

No optical counterpart was detected on the image of IGR J17464-3213 taken on 31/3/03 at the Bronberg Observatory.

Assuming a 1" accuracy (0.1" in RA) for the radio location of the transient, there is nothing visible on the image that comes within 10".

There seems to be a 'weak' indication of an extended source some 15" South of the radio position. It's most probably unrelated.

There are some bright radio sources also detected nearby, though not close enough (>20") to the reported radio detection. It is certainly not impossible that the XT hides within one of those lesser bright IR that were not on the image.

Again, as in the case of previous sources, all of the most prominent candidates within the error radius (in this case 2') around the original position, turned out to be bright 2Mass sources.

I might try another image, but like other such transients it will probably hide forever from small telescopes.

Regards,

Berto Monard Bronberg Observatory / CBA Pretoria

Comparison with 2MASS

(Berto Monard's CCD image, enlarged)

(2MASS J,H,Ks images, from 2MASS Visualer

The circle represents the radio position [17 46 15.61 +/- 0.01s, -32 13 59.9 +/- 1" (J2000)] announced in ATEL #137.

Infrared Observation by the IRSF/SIRIUS team

IGR J17464-3213 = XTE J17464-3213

D. Baba and T. Nagata, Nagoya University, on behalf of the InfraRed Survey Facility (IRSF)/ SImultaneous three-color InfraRed Imager for Unbiased Survey (SIRIUS) team of Nagoya University and the National Astronomical Observatory of Japan; I. Iwata, T. Kato, Kyoto University; and H. Yamaoka, Kyushu University report on near-infrared (J, H, Ks) imaging of the field of the x-ray transient IGR J17464-3213. Two distinct infrared sources exist within 2" of the radio counterpart (IAUC 8105); the NE one is not visible on public 2MASS images, and the SW one has similar brightness to the source on the 2MASS image. Given the proximity to the radio counterpart and the apparent absence on the 2MASS images, the NE source is likely the infrared counterpart of IGR J17464-3213. The coordinates of NE source is R.A. = 17h 46m 15s.573, Decl. = -32o 14' 01".13 (equinox 2000.0; from 34 2MASS reference stars; rms error 0.1"), which is consistent with the radio position. Ks magnitudes for the NE source are : April 5.97, Ks=13.9 +/- 0.2; April 6.97, Ks=13.6 +/- 0.2. The finding chart is available at http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Xray/j17464sirius.gif

Full resolution Ks-band images:
[April 5] [April 6]

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ATEL #132
ATEL #137
ATEL #140
ATEL #141

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