Observation information
- date-obs: 2025-04-06
- time-obs: 15:05:31.912500000
- date-end: 2025-04-06
- time-end: 17:26:00.886600000
- obs_id: A13_090T01_9000006458
- exposure: 3090.97295004
- 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_9000006458_51511cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51511cztM0_level2_quad_clean.evt
|
| Size (bytes) | 716,221,440 | 85,993,920 |
| Size | 683.0 MB
| 82.0 MB
|
| Events in quadrant A | 5,288,824 | 586,719 |
| Events in quadrant B | 3,963,464 | 683,591 |
| Events in quadrant C | 3,996,760 | 602,240 |
| Events in quadrant D | 12,749,422 | 269,489 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 20141 | 2 |
| B | 0 | 16203 | 2 |
| C | 0 | 16461 | 2 |
| D | 0 | 42451 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 18 | 0 |
| B | 0 | 19 | 0 |
| C | 0 | 19 | 0 |
| D | 0 | 19 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 134 | 0 |
| B | 0 | 134 | 0 |
| C | 0 | 134 | 0 |
| D | 0 | 134 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6623 | 663 | 10.010569% |
| B | 6623 | 237 | 3.578439% |
| C | 6623 | 247 | 3.729428% |
| D | 6623 | 3755 | 56.696361% |
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 | 7673 | 6624 | 436 | 436 | 5.68% | 6.58% |  |
| B | 7673 | 6624 | 49 | 49 | 0.64% | 0.74% |  |
| C | 7673 | 6624 | 183 | 183 | 2.38% | 2.76% |  |
| D | 7673 | 6624 | 3748 | 3748 | 48.85% | 56.58% |  |
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 | 7 | 64 | 702387 | 4149.85 | 696 | 679 | 169.1 |
| A | 8 | 43 | 505758 | 2987.0 | 696 | 679 | 169.1 |
| A | 7 | 235 | 246023 | 1450.95 | 696 | 679 | 169.1 |
| B | 0 | 171 | 208042 | 1330.46 | 732 | 706 | 155.8 |
| B | 5 | 185 | 164045 | 1048.13 | 732 | 706 | 155.8 |
| B | 15 | 52 | 130746 | 834.45 | 732 | 706 | 155.8 |
| C | 13 | 3 | 366697 | 1858.0 | 713 | 709 | 197.0 |
| C | 12 | 252 | 212253 | 1073.94 | 713 | 709 | 197.0 |
| C | 14 | 245 | 165062 | 834.37 | 713 | 709 | 197.0 |
| D | 8 | 176 | 9736266 | 72117.58 | 482 | 463 | 135.0 |
| D | 3 | 12 | 350493 | 2592.83 | 482 | 463 | 135.0 |
| D | 8 | 192 | 325806 | 2409.97 | 482 | 463 | 135.0 |
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 |  |