Observation information
- date-obs: 2025-04-06
- time-obs: 11:52:24.949500000
- date-end: 2025-04-06
- time-end: 14:01:02.924100000
- obs_id: A13_090T01_9000006458
- exposure: 2887.93399411
- 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_51509cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51509cztM0_level2_quad_clean.evt
|
Size (bytes) | 814,259,520 | 84,813,120 |
Size | 776.5 MB
| 80.9 MB
|
Events in quadrant A | 6,052,571 | 583,491 |
Events in quadrant B | 5,794,695 | 642,178 |
Events in quadrant C | 4,115,753 | 619,978 |
Events in quadrant D | 13,667,335 | 262,032 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22243 | 1 |
B | 0 | 21690 | 1 |
C | 0 | 16578 | 1 |
D | 0 | 45208 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 11 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 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 | 6598 | 867 | 13.140346% |
B | 6599 | 806 | 12.213972% |
C | 6599 | 228 | 3.455069% |
D | 6599 | 3994 | 60.524322% |
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 | 7718 | 6599 | 685 | 685 | 8.88% | 10.38% |  |
B | 7719 | 6600 | 551 | 551 | 7.14% | 8.35% |  |
C | 7719 | 6600 | 156 | 156 | 2.02% | 2.36% |  |
D | 7719 | 6600 | 4017 | 4017 | 52.04% | 60.86% |  |
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 | 15 | 174 | 1461541 | 8512.45 | 704 | 685 | 171.6 |
A | 12 | 250 | 730459 | 4252.41 | 704 | 685 | 171.6 |
A | 8 | 43 | 320618 | 1864.26 | 704 | 685 | 171.6 |
B | 5 | 172 | 1898559 | 12464.24 | 711 | 686 | 152.3 |
B | 2 | 208 | 288815 | 1892.28 | 711 | 686 | 152.3 |
B | 15 | 52 | 269276 | 1763.96 | 711 | 686 | 152.3 |
C | 15 | 1 | 297972 | 1536.82 | 712 | 705 | 193.4 |
C | 12 | 252 | 202993 | 1045.79 | 712 | 705 | 193.4 |
C | 12 | 249 | 184670 | 951.06 | 712 | 705 | 193.4 |
D | 8 | 176 | 9605142 | 68217.17 | 504 | 484 | 140.8 |
D | 11 | 176 | 678102 | 4812.79 | 504 | 484 | 140.8 |
D | 8 | 192 | 508295 | 3606.73 | 504 | 484 | 140.8 |
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 |  |