Deep Lens Survey : Real-time Transient Detection


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CTIO, Apr 2002


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This page contains REAL-TIME information on detections of transient astronomical happenings from the Deep Lens Survey, currently being undertaken on the KPNO and CTIO 4-m telescopes using the wide-field MOSAIC imagers.

A by-product of this wide-field survey is the detection of transient astronomical phenomena, including Near Earth Objects (NEO), Kupier Belt Objects (KBO), Supernova (SN), and even previously unknown events which happen with such rarity that only a deep, wide field survey, such as this one, is even reasonably sensitive to them.



The table below contains recently updated information on objects detected during the course of this survey. These are extracted from the images in real-time using a combination of SExtractor for object detection and image subtraction to provide differenced images, from which we are able to identify transient, or "new", objects, after filtering out spurious objects like cosmic rays. These objects have also been inspected by eye and categorized as probably real.

We include the date, DATE-ARCH, when the object was added to this archive or updated, the date the object was most recently observed DATE-OBS (MJD), and the FILTER of this observation. Additionally, we include the RA and DEC (J2000, to ~0.5'' accuracy) of the object, a preliminary categorization of the nature of the transient, and a preliminary estimate of the magnitude of the variability (+/- 0.1 mag in R and B, +/- 0.5 in V and z). Two types of images are available for download: .jpg mosaics and .fits finding charts.

The mosaic page includes a time-series of JPEGs showing 200-pixel (50") postage stamps, with time increasing from top to bottom. The discovery mosic includes a template observation on the left, discovery image in the middle, and difference image on the right. Subsequent mosaics show a similar collection of images, or the new observation image only, in the case where a subtraction image was not available. The files are generally a few hundred kilobytes. In CTIO mosaics, East is up and North is to the right. For KPNO, East is down and North is to the left.

The finding charts are 3'x3' FITS images centered on the discovery position. The time in the header is the start of the exposure and the world coordinate system in the header is accurate to 0.5". The files are 3 MB. The images are zero-padded to maintain the object in the center even if it was near the edge of the discovery image. Your browser may not bring up saoimage/ximtool automatically on the FITS file. Right-click on the link to save to local disk.

Moving objects are submitted to the Minor Planet Center at the end of each night. For those objects which receive a designation, we provide a link to query the MPC database - new objects are indicated with bold font. For those objects which do not receive a designation, we provide our own ASCII list of positions and times.



To make things considerably more exciting, we will color code interesting transients using the following notation

Supernova
Unknown (stationary)
Variable Star
Rapidly Moving Transient
Slowly Moving Transient (< 2" / hr)
ID
EST DATE-ARCH
TYPE
UT-DATE-OBS (MJD)
FILTER
RA (J2000)
DEC (J2000)
MOSAIC
ADDITIONAL INFO
MAG
trans14
Apr 16 16:45
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:51:06.88
-4:30:57.87
time series
finding chart
23.4
trans63
Apr 16 13:56
moving@33.7 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:21.67
-10:39:41.15
time series
ephemeris
21.2
trans62
Apr 16 13:56
moving@0.0 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:20.89
-10:22:18.49
time series
ephemeris
21.8
trans61
Apr 16 13:56
moving@37.2 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:14.57
-10:08:38.54
time series
ephemeris
21.8
trans60
Apr 16 13:55
moving@36.5 ''/hr
2002-04-11 05:51:17.205 (52375.243949)
V
14:03:11.03
-10:29:42.56
time series
ephemeris
18.4
trans59
Apr 16 13:55
moving@32.4 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:03:01.325
-10:27:28.86
time series
ephemeris
20.9
trans58
Apr 16 13:54
moving@33.3 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:18.791
-10:19:04.91
time series
ephemeris
20.9
trans57
Apr 16 13:54
moving@39.4 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:36.208
-10:10:04.89
time series
ephemeris
19.8
trans56
Apr 16 13:53
moving@30.6 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:31.002
-10:39:04.73
time series
ephemeris
20.8
trans55
Apr 16 13:53
moving@31.8 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:43.640
-10:18:08.50
time series
ephemeris
19.3
trans54
Apr 16 13:52
moving@35.3 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:22.281
-10:07:27.92
time series
ephemeris
21.3
trans53
Apr 16 13:52
moving@19.5 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:19.774
-10:06:49.12
time series
ephemeris
20.4
trans52
Apr 16 13:51
moving@32.7 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:18.534
-10:26:02.79
time series
ephemeris
21.4
trans51
Apr 16 13:51
moving@36.7 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:00.417
-10:20:38.21
time series
ephemeris
18.8
trans50
Apr 16 13:50
moving@30.9 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:59.691
-10:06:21.12
time series
ephemeris
18.7
trans49
Apr 16 13:50
moving@37.0 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:50.566
-10:13:12.81
time series
ephemeris
19.2
trans48
Apr 16 13:49
moving@28.6 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:24.539
-10:21:07.35
time series
ephemeris
18.8
trans47
Apr 16 13:49
moving@30.8 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:00.492
-10:34:37.66
time series
ephemeris
21.8
trans46
Apr 16 13:49
moving@41.1 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:00:56.182
-10:07:55.24
time series
ephemeris
20.9
trans45
Apr 16 13:48
moving@37.1 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:48.109
-10:15:30.16
time series
ephemeris
22.1
trans44
Apr 16 13:48
moving@40.5 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:41.155
-10:11:42.00
time series
ephemeris
21.1
trans43
Apr 16 13:47
moving@41.6 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:18.689
-10:23:38.87
time series
ephemeris
21.4
trans42
Apr 16 13:47
moving@38.6 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:02.631
-10:10:02.91
time series
ephemeris
21.7
trans41
Apr 16 13:46
moving@35.4 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:02:01.372
-10:33:36.66
time series
ephemeris
21.4
trans40
Apr 16 13:46
moving@34.3 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:59.528
-10:23:54.04
time series
ephemeris
21.3
trans39
Apr 16 13:45
moving@31.3 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:54.379
-10:40:57.14
time series
ephemeris
21.1
trans38
Apr 16 13:45
moving@41.3 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:50.878
-10:14:20.15
time series
ephemeris
22.6
trans36
Apr 16 13:44
moving@41.5 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:41.211
-10:30:40.30
time series
ephemeris
21.3
trans35
Apr 16 13:44
moving@34.2 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:39.786
-10:16:02.64
time series
ephemeris
21.7
trans34
Apr 16 13:43
moving@31.7 ''/hr
2002-04-11 06:02:59.591 (52375.252079)
V
14:01:37.285
-10:11:33.55
time series
ephemeris
21.8
trans33
Apr 16 13:41
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:03:10.83
-10:35:55.26
time series
finding chart
23.3
trans32
Apr 16 13:39
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:03:03.15
-10:30:23.06
time series
finding chart
22.0
trans31
Apr 16 13:38
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:02:37.03
-10:36:38.66
time series
finding chart
22.3
trans30
Apr 16 13:36
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:02:30.84
-10:29:41.41
time series
finding chart
22.0
trans29
Apr 16 13:35
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:02:22.94
-10:29:49.11
time series
finding chart
22.7
trans28
Apr 16 13:33
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:02:22.63
-10:14:54.99
time series
finding chart
22.2
trans27
Apr 16 13:31
supernova
2002-04-11 05:16:9.611 (52375.219556)
V
14:02:07.18
-10:29:30.91
time series
finding chart
20.3
trans26
Apr 16 13:29
supernova
2002-04-11 05:16:9.611 (52375.219556)
V
14:02:03.14
-10:35:23.90
time series
finding chart
20.5
trans25
Apr 16 13:25
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:47.18
-10:25:31.58
time series
finding chart
23.3
trans24
Apr 16 13:23
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:45.25
-10:31:29.22
time series
finding chart
21.7
trans23
Apr 16 13:21
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:44.17
-10:08:40.50
time series
finding chart
23.0
trans22
Apr 16 13:16
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:42.61
-10:40:28.80
time series
finding chart
23.4
trans21
Apr 16 13:14
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:25.35
-10:26:51.13
time series
finding chart
22.2
trans20
Apr 16 13:12
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:14.61
-10:29:09.17
time series
finding chart
21.6
trans19
Apr 16 13:10
variable_star
2002-04-11 05:16:9.611 (52375.219556)
V
14:01:02.66
-10:17:15.01
time series
finding chart
22.7
trans18
Apr 16 13:08
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:51:43.01
-4:28:38.40
time series
finding chart
24.6
trans17
Apr 16 13:06
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:51:27.01
-4:20:32.95
time series
finding chart
22.8
trans16
Apr 16 13:04
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:51:24.89
-4:37:10.06
time series
finding chart
23.2
trans15
Apr 16 13:02
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:51:22.75
-4:37:05.35
time series
finding chart
21.4
trans13
Apr 16 12:58
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:53:06.13
-4:29:14.33
time series
finding chart
23.3
trans12
Apr 16 12:58
moving@0.0 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:52:23.04
-4:04:54.73
time series
ephemeris
19.1
trans11
Apr 16 12:56
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:52:26.29
-4:31:16.51
time series
finding chart
24.1
trans10
Apr 16 12:54
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:52:22.44
-4:16:05.50
time series
finding chart
23.5
trans9
Apr 16 12:52
variable_star
2002-04-10 03:42:15.917 (52374.154351)
V
10:52:11.51
-4:27:28.41
time series
finding chart
23.4
trans8
Apr 16 12:51
moving@15.3 ''/hr
2002-04-10 04:17:23.392 (52374.178743)
V
10:52:46.484
-04:04:01.08
time series
ephemeris
20.6
trans7
Apr 16 12:50
moving@20.7 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:52:20.82
-4:24:33.56
time series
ephemeris
22.4
trans6
Apr 16 12:50
moving@14.8 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:52:48.34
-4:14:24.38
time series
ephemeris
21.5
trans5
Apr 16 12:49
moving@22.3 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:52:46.61
-4:18:57.24
time series
ephemeris
21.6
trans4
Apr 16 12:48
moving@26.6 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:52:41.25
-4:10:08.14
time series
ephemeris
21.9
trans3
Apr 16 12:47
moving@22.0 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:52:08.97
-4:10:33.10
time series
ephemeris
22.3
trans2
Apr 16 12:47
moving@16.5 ''/hr
2002-04-10 04:17:23.392 (52374.178743)
V
10:51:53.956
-04:12:50.54
time series
ephemeris
19.6
trans1
Apr 16 12:46
moving@14.7 ''/hr
2002-04-10 04:29:5.559 (52374.186870)
V
10:51:14.60
-4:10:49.99
time series
ephemeris
17.4



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Deep Lens Survey Transient Page
Last updated : Fri Aug 30 10:00:02 EDT 2002