Observation information
- date-obs: 2025-04-22
- time-obs: 21:45:27.831000000
- date-end: 2025-04-23
- time-end: 01:44:51.773500000
- obs_id: A13_090T01_9000006464
- exposure: 9895.25315601
- sourceid: 4U 1755-338
- observer: arbind2196
- ra_pnt: 269.6667
- dec_pnt: -33.8075
Basic statistics of files
Param |
Original file |
Final file |
Filename | modeM0/AS1A13_090T01_9000006464_51754cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51754cztM0_level2_quad_clean.evt
|
Size (bytes) | 1,129,749,120 | 164,577,600 |
Size | 1.1 GB
| 157.0 MB
|
Events in quadrant A | 7,120,996 | 1,133,429 |
Events in quadrant B | 12,133,628 | 1,066,558 |
Events in quadrant C | 6,977,905 | 1,099,092 |
Events in quadrant D | 14,641,056 | 838,028 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22 | 0 |
B | 0 | 23 | 0 |
C | 0 | 23 | 0 |
D | 0 | 23 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 246 | 0 |
B | 0 | 246 | 0 |
C | 0 | 246 | 0 |
D | 0 | 246 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 29578 | 2 |
B | 0 | 44634 | 2 |
C | 0 | 29257 | 2 |
D | 0 | 51978 | 10 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 12237 | 259 | 2.116532% |
B | 12237 | 2083 | 17.022146% |
C | 12237 | 287 | 2.345346% |
D | 12236 | 2705 | 22.106898% |
Noise dominated fraction
Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.
Quadrant |
# 1 sec bins |
Bins with >0 counts |
Bins with >2000 counts |
High rate bins dominated by noise |
Noise dominated (total time) |
Noise dominated (detector-on time) |
Marked lightcurve |
A | 14209 | 12239 | 129 | 129 | 0.91% | 1.05% |  |
B | 14209 | 12239 | 1299 | 1299 | 9.14% | 10.61% |  |
C | 14209 | 12239 | 221 | 221 | 1.56% | 1.81% |  |
D | 14208 | 12238 | 2297 | 2297 | 16.17% | 18.77% |  |
Top noisy pixels
Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1
Pixel properties |
Quadrant properties |
Quadrant |
DetID |
PixID |
Counts |
Sigma |
Mean |
Median |
Sigma |
A | 12 | 3 | 566535 | 1767.44 | 1295 | 1264 | 319.8 |
A | 4 | 3 | 233829 | 727.16 | 1295 | 1264 | 319.8 |
A | 5 | 240 | 145583 | 451.24 | 1295 | 1264 | 319.8 |
B | 4 | 206 | 5417788 | 20926.61 | 1213 | 1171 | 258.8 |
B | 7 | 0 | 512078 | 1973.84 | 1213 | 1171 | 258.8 |
B | 8 | 128 | 438253 | 1688.63 | 1213 | 1171 | 258.8 |
C | 13 | 3 | 352155 | 1005.99 | 1274 | 1268 | 348.8 |
C | 1 | 243 | 331225 | 945.98 | 1274 | 1268 | 348.8 |
C | 9 | 38 | 222355 | 633.85 | 1274 | 1268 | 348.8 |
D | 11 | 129 | 8493699 | 26604.5 | 1141 | 1099 | 319.2 |
D | 8 | 176 | 582429 | 1821.11 | 1141 | 1099 | 319.2 |
D | 3 | 12 | 295252 | 921.48 | 1141 | 1099 | 319.2 |
Detector plane histogram (DPH)
Histogram calculated using DETX and DETY for each event in the final _common_clean file
Quadrant A |
 |
 |
Quadrant B |
Quadrant D |
 |
 |
Quadrant C |
Count rate plots and images
Plot type |
Count rate plots |
Images |
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data. |
 |
 |
Quadrant-wise count rates
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins |
 |
 |
Housekeeping plots
Parameter |
Plot |
CZT HV Monitor |  |
D_VDD |  |
Temperature 1 |  |
Veto HV Monitor |  |
Veto LLD |  |
Alpha Counter |  |
_CPM_Rate |  |
CZT Counter |  |
+2.5 Volts monitor |  |
+5 Volts monitor |  |
_ROLL_ROT |  |
_Roll_DEC |  |
_Roll_RA |  |
Veto Counter |  |