The INTEGRAL Spiral Arms (ISA) program consists of regular observations of the Scutum and Norma Arm regions (Galactic Longitude: +-25 degrees).

Here, you will find images of the fields and a list of sources detected during the ISA program.

Abstract: This Key Programme consists of high-cadence monitoring of the inner spiral arms of the Galaxy with INTEGRAL paired with ToO observations of new transients with XMM-Newton and Swift. While these regions are already exposed thanks to the Galactic Plane Scans (GPS), many transients are being missed because of month-long gaps between scans of any particular region. This program (12.3 ks per arm region, when visible, for a total of ~1 Ms per year) complements the successful Galactic bulge (GB) monitoring program by extending the monitored region of the Galaxy to the Inner Norma/Perseus Arm tangents on one side of the GB (l,b)=(337.5,0), and the Scutum/Sagittarius Arms on the other (l,b)=(22.5,0). These fields are densely packed with obscured high-mass X-ray binaries (HMXBs), Supergiant Fast X-ray Transients (SFXTs), as well as other hard X-ray emitting sources (e.g., microquasars, low-mass X-ray binaries, bursters, and magnetars) that INTEGRAL is well-suited to finding thanks to its large field of view and angular resolution at high energies. Source light curves in 2 energy bands for IBIS/ISGRI and JEM-X are provided to the community permitting rapid dissemination of results which will enable prompt follow-up of interesting events.

Schedule & Results

Current INTEGRAL observations

Planned INTEGRAL observations

Rev.

Dates

Target

Comments

1514

2015-03-04 18:21:46 to 2015-03-04 22:03:21

Scutum/Sagittarius

1513

2015-03-01 06:45:16 to 2015-03-01 10:27:13

Norma/Perseus

1513

2015-03-01 02:35:31 to 2015-03-01 06:17:26

Scutum/Sagittarius

1512

2015-02-26 11:44:12 to 2015-02-26 15:25:47

Scutum/Sagittarius

1512

2015-02-26 07:34:14 to 2015-02-26 11:15:50

Norma/Perseus

1511

2015-02-24 19:51:09 to 2015-02-24 23:32:46

Scutum/Sagittarius

1510

2015-02-19 21:58:06 to 2015-02-20 01:39:41

Norma/Perseus

ISGRI images are noisy.

1510

2015-02-21 03:06:22 to 2015-02-21 06:48:19

Scutum/Sagittarius

1509

2015-02-19 21:58:06 to 2015-02-20 01:39:41

Norma/Perseus

problems with ISGRI images for ScWs 82-86; they were not included in the mosaic which is noisy as a result.

1509

2015-02-20 02:05:19 to 2015-02-20 05:47:05

Scutum/Sagittarius

problems with ISGRI images for ScWs 88-94; revolution skipped

1508

2015-02-16 08:44:41 to 2015-02-17 12:32:57

Scutum/Sagittarius

2 hex patterns executed

1508

2015-02-17 04:41:02 to 2015-02-17 08:22:57

Norma/Perseus

ISGRI images are noisy

1476

2014-11-14 10:31:11 to 2014-11-14 14:12:54

Scutum/Sagittarius

new source? (R.A,Dec.)=(282.032,+3.462), significance=7sigma

1470

2014-10-28 07:50:42 to 2014-10-28 11:32:27

Scutum/Sagittarius

Problems with JEM-X2 mosaic

1469

2014-10-26 04:39:24 to 2014-10-26 08:21:19

Scutum/Sagittarius

ScW 78 is missing

1468

2014-10-22 06:13:53 to 2014-10-22 09:55:48

Scutum/Sagittarius

1467

2014-10-18 12:35:16 to 2014-10-21 03:01:38

Scutum/Sagittarius

2 hex patterns executed

1467

2014-10-20 19:04:13 to 2014-10-20 22:46:01

Norma/Perseus

1466

2014-10-17 03:34:31 to 2014-10-17 07:16:27

Norma/Perseus

1466

2014-10-16 03:51:36 to 2014-10-16 07:33:12

Scutum/Sagittarius

1465

2014-10-13 20:40:26 to 2014-10-14 00:22:22

Scutum/Sagittarius

1464

2014-10-12 00:23:02 to 2014-10-12 04:04:57

Norma/Perseus

1460

2014-09-27 23:05:08 to 2014-09-28 03:18:39

Norma/Perseus

1460

2014-09-27 13:53:44 to 2014-09-27 18:36:05

Scutum/Sagittarius

1458

2014-09-21 23:07:08 to 2014-09-22 03:20:40

Scutum/Sagittarius

1458

2014-09-21 14:27:19 to 2014-09-21 18:40:51

Norma/Perseus

1456

2014-09-15 14:31:55 to 2014-09-15 18:57:02

Norma/Perseus

1455

2014-09-12 23:23:38 to 2014-09-13 03:05:34

Norma/Perseus

1455

2014-09-12 14:46:16 to 2014-09-12 18:56:52

Scutum/Sagittarius

1454

2014-09-09 23:55:16 to 2014-09-10 04:08:45

Norma/Perseus

1454

2014-09-09 15:06:48 to 2014-09-09 19:28:48

Scutum/Sagittarius

1453

2014-09-08 20:52:01 to 2014-09-09 00:33:47

Scutum/Sagittarius

1453

2014-09-06 15:16:57 to 2014-09-06 18:58:55

Norma/Perseus

1451

2014-08-31 23:56:18 to 2014-09-01 03:38:16

Norma/Perseus

1451

2014-08-31 15:46:48 to 2014-08-31 19:28:23

Scutum/Sagittarius

1450

2014-08-28 16:05:05 to 2014-08-28 19:46:41

Norma/Perseus

1449

2014-08-28 04:56:46 to 2014-08-28 08:06:37

Scutum/Sagittarius

1449

2014-08-27 07:51:18 to 2014-08-27 11:00:57

Norma/Perseus

1448

2014-08-24 07:40:46 to 2014-08-24 11:22:32

Norma/Perseus

INTEGRAL non-detection of AGL J1608-5253 (ATel #6428)

1448

2014-08-22 16:37:15 to 2014-08-22 20:18:55

Scutum/Sagittarius

1447

2014-08-19 20:44:42 to 2014-08-20 00:26:17

Norma/Perseus

1446

2014-08-17 20:26:29 to 2014-08-18 00:56:00

Norma/Perseus

1395

2014-03-19 15:01:33 to 2014-03-19 18:43:30

Norma/Perseus

1395

2014-03-19 06:30:56 to 2014-03-19 10:37:43

Scutum/Sagittarius

1392

2014-03-10 15:36:22 to 2014-03-10 19:17:57

Scutum/Sagittarius

IGR J18270-0641: candidate X-ray transient; not detected in Swift ToO

1392

2014-03-09 23:39:04 to 2014-03-10 03:20:40

Norma/Perseus

1389

2014-03-01 16:31:24 to 2014-03-01 20:13:10

Scutum/Sagittarius

Solar activity (no JEM-X data)

1389

2014-03-01 08:24:28 to 2014-03-01 12:06:03

Norma/Perseus

Solar activity (no JEM-X data)

1386

2014-02-20 16:53:41 to 2014-02-20 20:35:27

Scutum/Sagittarius

1386

2014-02-19 17:49:25 to 2014-02-19 21:31:01

Norma/Perseus

ScW 39 was noisy in IBIS (excluded)

1350

2013-11-02 18:55:59 to 2013-11-02 22:37:55

Scutum/Sagittarius

Problems with JEM-X analysis

1349

2013-10-30 13:02:10 to 2013-10-30 16:44:06

Scutum/Sagittarius

1348

2013-10-28 07:52:41 to 2013-10-28 11:34:17

Scutum/Sagittarius

1347

2013-10-24 13:19:04 to 2013-10-24 17:00:49

Scutum/Sagittarius

1346

2013-10-24 00:25:57 to 2013-10-24 04:07:53

Scutum/Sagittarius

1346

2013-10-21 13:33:41 to 2013-10-21 17:15:29

Norma/Perseus

1345

2013-10-18 13:47:44 to 2013-10-18 17:29:31

Norma/Perseus

1344

2013-10-18 00:52:02 to 2013-10-18 04:33:48

Scutum/Sagittarius

1344

2013-10-15 14:01:18 to 2013-10-15 17:43:15

Norma/Perseus

1343

2013-10-12 14:17:01 to 2013-10-12 17:58:46

Norma/Perseus

ScW 2 is missing from JEM-X2

1341

2013-10-09 01:57:59 to 2013-10-09 05:39:35

Scutum/Sagittarius

ScW 111 is too short

1341

2013-10-07 11:06:08 to 2013-10-07 14:47:53

Norma/Perseus

1340

2013-10-06 01:44:02 to 2013-10-06 05:25:38

Scutum/Sagittarius

1340

2013-10-04 14:34:00 to 2013-10-04 18:15:45

Norma/Perseus

1337

2013-09-27 02:07:01 to 2013-09-27 05:48:59

Scutum/Sagittarius

1337

2013-09-24 14:52:04 to 2013-09-24 19:00:12

Norma/Perseus

1336

2013-09-21 15:04:29 to 2013-09-21 18:46:05

Norma/Perseus

1335

2013-09-21 02:33:00 to 2013-09-21 06:14:47

Scutum/Sagittarius

1335

2013-09-18 15:18:35 to 2013-09-18 19:00:11

Norma/Perseus

Detection of the SFXTs IGR J16418-4532 and IGR J18483-0311 in outburst (ATel #5402)

1334

2013-09-18 02:13:47 to 2013-09-18 05:55:30

Scutum/Sagittarius

Detection of the SFXTs IGR J16418-4532 and IGR J18483-0311 in outburst (ATel #5402)

1333

2013-09-13 23:14:32 to 2013-09-14 03:21:40

Scutum/Sagittarius

ScW 52 is missing

1332

2013-09-10 16:29:41 to 2013-09-10 20:11:28

Norma/Perseus

1332

2013-09-09 16:11:32 to 2013-09-09 20:11:40

Scutum/Sagittarius

1331

2013-09-07 11:14:26 to 2013-09-07 16:00:24

Scutum/Sagittarius

1331

2013-09-06 16:12:48 to 2013-09-06 19:54:46

Norma/Perseus

1330

2013-09-04 15:33:56 to 2013-09-04 19:45:00

Norma/Perseus

1330

2013-09-03 16:39:46 to 2013-09-03 20:21:32

Scutum/Sagittarius

1329

2013-09-01 00:38:36 to 2013-09-01 04:20:23

Scutum/Sagittarius

1329

2013-08-31 16:35:37 to 2013-08-31 20:17:35

Norma/Perseus

1326

2013-08-25 00:37:49 to 2013-08-25 04:19:27

Scutum/Sagittarius

1326

2013-08-24 05:35:53 to 2013-08-24 09:17:39

Norma/Perseus

1318

2013-07-30 04:56:54 to 2013-07-30 08:38:41

Norma/Perseus

1316

2013-07-24 18:25:42 to 2013-07-24 22:07:25

Norma/Perseus

1290

2013-05-07 08:45:09 to 2013-05-07 12:26:55

Scutum/Sagittarius

Problem with combined JEM-X mosaic

1289

2013-05-06 13:50:14 to 2013-05-06 17:32:02

Scutum/Sagittarius

1288

2013-05-01 02:03:57 to 2013-05-01 05:45:36

Scutum/Sagittarius

1287

2013-04-30 14:16:24 to 2013-04-30 17:58:11

Scutum/Sagittarius

1286

2013-04-27 13:52:35 to 2013-04-27 17:34:23

Scutum/Sagittarius

ISGRI images are noisy

1285

2013-04-22 02:39:28 to 2013-04-22 10:05:17

Scutum/Sagittarius

2 revs.

1280

2013-04-08 21:41:16 to 2013-04-09 01:23:03

Scutum/Sagittarius

1276

2013-03-28 18:04:39 to 2013-03-28 20:10:38

Scutum/Sagittarius

4 ScWs

1271

2013-03-13 19:07:33 to 2013-03-13 21:13:30

Scutum/Sagittarius

4 ScWs

1267

2013-02-27 06:53:19 to 2013-02-27 10:03:10

Norma/Perseus

6 ScWs

1266

2013-02-26 19:43:42 to 2013-02-26 22:53:41

Scutum/Sagittarius

6 ScWs

1265

2013-02-21 07:17:55 to 2013-02-21 10:27:35

Norma/Perseus

6 ScWs

1262

2013-02-12 11:56:18 to 2013-02-13 11:47:16

Norma/Perseus

2 hex patterns executed; ISGRI images are noisy

1261

2013-02-11 04:58:49 to 2013-02-11 08:40:24

Norma/Perseus

ISGRI images are noisy

1260

2013-02-07 23:47:16 to 2013-02-08 03:28:52

Norma/Perseus

ISGRI images are noisy; ScWs 41-42 are missing; ScW 43 shortened

1259

2013-02-03 08:32:56 to 2013-02-03 12:14:43

Norma/Perseus

ISGRI images are noisy

1257

2013-01-29 20:00:27 to 2013-01-29 23:42:02

Norma/Perseus

1256

2013-01-26 10:38:54 to 2013-01-26 14:20:39

Norma/Perseus

1254

2013-01-19 09:33:06 to 2013-01-19 13:14:52

Norma/Perseus

1253

2013-01-16 11:43:41 to 2013-01-16 15:25:37

Norma/Perseus

1227

2012-10-30 14:51:30 to 2012-10-30 22:24:02

Scutum/Sagittarius

1226

2012-10-28 09:48:54 to 2012-10-28 13:30:40

Scutum/Sagittarius

1225

2012-10-25 10:27:02 to 2012-10-25 14:08:38

Scutum/Sagittarius

1224

2012-10-21 22:11:29 to 2012-10-22 01:53:05

Scutum/Sagittarius

1223

2012-10-20 20:16:34 to 2012-10-20 23:58:31

Scutum/Sagittarius

1223

2012-10-20 16:04:54 to 2012-10-20 19:46:50

Norma/Perseus

1219

2012-10-09 05:01:10 to 2012-10-09 08:42:46

Scutum/Sagittarius

1218

2012-10-06 04:35:44 to 2012-10-06 08:17:20

Scutum/Sagittarius

1210

2012-09-12 06:58:26 to 2012-09-12 10:40:01

Scutum/Sagittarius

ScW 122 is missing

1209

2012-09-06 18:18:23 to 2012-09-06 22:00:21

Norma/Perseus

Hard X-ray detection of the black hole candidates 4U 1630-47 and IGR J17091-3624 up to 200 keV with INTEGRAL (ATel #4360)

1208

2012-09-06 06:57:49 to 2012-09-06 10:39:35

Scutum/Sagittarius

1207

2012-09-02 05:18:43 to 2012-09-02 09:00:29

Norma/Perseus

1206

2012-08-29 16:58:01 to 2012-08-29 20:39:58

Norma/Perseus

no isgri_sky_img files for ScWs 19 and 20

1205

2012-08-26 10:17:53 to 2012-08-26 13:59:40

Scutum/Sagittarius

1204

2012-08-22 19:26:54 to 2012-08-22 23:08:51

Norma/Perseus

1203

2012-08-20 23:28:03 to 2012-08-21 03:09:59

Scutum/Sagittarius

INTEGRAL detects Swift J1910.2-0546 (= MAXI J1910-057) in the hard X-rays (ATel #4328)

1201

2012-08-13 20:02:42 to 2012-08-13 23:44:17

Norma/Perseus

ScW 7 is missing

1200

2012-08-13 04:51:04 to 2012-08-13 08:32:49

Norma/Perseus

1198

2012-08-05 08:25:49 to 2012-08-05 12:07:25

Norma/Perseus

1166

2012-05-03 11:27:50 to 2012-05-03 19:07:26

Scutum/Sagittarius

2 hex patterns executed

1165

2012-04-30 10:03:11 to 2012-04-30 13:44:56

Scutum/Sagittarius

1164

2012-04-27 11:58:08 to 2012-04-27 19:24:15

Scutum/Sagittarius

2 hex patterns executed

1163

2012-04-22 04:26:43 to 2012-04-22 08:08:29

Scutum/Sagittarius

1161

2012-04-16 09:17:22 to 2012-04-16 12:59:09

Scutum/Sagittarius

1154

2012-03-28 15:18:02 to 2012-03-28 22:43:45

Scutum/Sagittarius

2.5 hex patterns executed

1153

2012-03-25 18:36:27 to 2012-03-25 21:14:11

Scutum/Sagittarius

1150

2012-03-14 07:33:31 to 2012-03-14 11:15:07

Scutum/Sagittarius

JEM-X2 data starts at ScW 8, so only JEM-X1 data was used

1147

2012-03-05 19:07:15 to 2012-03-05 22:49:11

Scutum/Sagittarius

1147

2012-03-07 03:09:15 to 2012-03-07 06:51:02

Norma/Perseus

Solar flare to end the observation

1146

2012-03-03 11:41:55 to 2012-03-03 15:23:41

Scutum/Sagittarius

IGR J18179-1621 (ATel #3947)

1145

2012-02-28 08:35:56 to 2012-02-28 12:17:54

Norma/Perseus

INTEGRAL detects the hard X-ray brightening of 4U 1630-47 (ATel #3945)

1143

2012-02-22 09:03:26 to 2012-02-22 12:45:02

Norma/Perseus

new source? (RA;Dec.)=(232.409;-57.346). XRT ToO shows nothing.

1139

2012-02-10 09:52:57 to 2012-02-10 13:34:43

Norma/Perseus

1138

2012-02-07 10:05:24 to 2012-02-07 14:11:29

Norma/Perseus