Observation information
- date-obs: 2025-04-21
- time-obs: 21:12:32.752500000
- date-end: 2025-04-21
- time-end: 23:37:10.050600000
- obs_id: A13_090T01_9000006464
- exposure: 5058.75845087
- 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_51737cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51737cztM0_level2_quad_clean.evt
|
Size (bytes) | 730,635,840 | 96,661,440 |
Size | 696.8 MB
| 92.2 MB
|
Events in quadrant A | 5,679,385 | 638,754 |
Events in quadrant B | 4,506,398 | 717,666 |
Events in quadrant C | 5,712,526 | 636,475 |
Events in quadrant D | 10,593,838 | 435,583 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 16 | 0 |
B | 0 | 16 | 0 |
C | 0 | 16 | 0 |
D | 0 | 16 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 146 | 0 |
B | 0 | 146 | 0 |
C | 0 | 146 | 0 |
D | 0 | 146 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 21871 | 2 |
B | 0 | 18358 | 2 |
C | 0 | 22072 | 5 |
D | 0 | 36423 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7153 | 632 | 8.835454% |
B | 7154 | 324 | 4.528935% |
C | 7153 | 276 | 3.858521% |
D | 7153 | 2442 | 34.139522% |
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 | 8678 | 7155 | 511 | 511 | 5.89% | 7.14% |  |
B | 8679 | 7156 | 190 | 190 | 2.19% | 2.66% |  |
C | 8678 | 7155 | 232 | 232 | 2.67% | 3.24% |  |
D | 8678 | 7153 | 2343 | 2343 | 27.00% | 32.76% |  |
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 | 13 | 248 | 1378124 | 7460.33 | 746 | 730 | 184.6 |
A | 3 | 14 | 162839 | 878.02 | 746 | 730 | 184.6 |
A | 8 | 47 | 143148 | 771.37 | 746 | 730 | 184.6 |
B | 4 | 174 | 290124 | 1748.78 | 763 | 734 | 165.5 |
B | 8 | 128 | 235007 | 1415.71 | 763 | 734 | 165.5 |
B | 4 | 206 | 180644 | 1087.19 | 763 | 734 | 165.5 |
C | 3 | 242 | 1736363 | 8374.24 | 747 | 742 | 207.3 |
C | 12 | 249 | 229473 | 1103.61 | 747 | 742 | 207.3 |
C | 13 | 3 | 200151 | 962.13 | 747 | 742 | 207.3 |
D | 11 | 129 | 6359199 | 36073.06 | 624 | 600 | 176.3 |
D | 8 | 176 | 1170124 | 6634.84 | 624 | 600 | 176.3 |
D | 2 | 249 | 87385 | 492.34 | 624 | 600 | 176.3 |
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 |  |