Observation information
- date-obs: 2025-04-26
- time-obs: 02:14:56.498500000
- date-end: 2025-04-26
- time-end: 04:15:36.030100000
- obs_id: A13_090T01_9000006464
- exposure: 4869.68162262
- 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_51800cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51800cztM0_level2_quad_clean.evt
|
Size (bytes) | 643,970,880 | 84,634,560 |
Size | 614.1 MB
| 80.7 MB
|
Events in quadrant A | 5,039,768 | 573,681 |
Events in quadrant B | 6,356,701 | 528,176 |
Events in quadrant C | 4,764,408 | 572,818 |
Events in quadrant D | 7,203,604 | 460,500 |
Level1 data integrity
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 | 126 | 0 |
B | 0 | 126 | 0 |
C | 0 | 126 | 0 |
D | 0 | 126 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19120 | 2 |
B | 0 | 23136 | 2 |
C | 0 | 18543 | 2 |
D | 0 | 25620 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6115 | 350 | 5.723630% |
B | 6115 | 1362 | 22.273099% |
C | 6115 | 193 | 3.156173% |
D | 6116 | 1175 | 19.211903% |
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 | 7240 | 6115 | 196 | 196 | 2.71% | 3.21% |  |
B | 7240 | 6115 | 992 | 992 | 13.70% | 16.22% |  |
C | 7240 | 6115 | 85 | 85 | 1.17% | 1.39% |  |
D | 7241 | 6116 | 1110 | 1110 | 15.33% | 18.15% |  |
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 | 3 | 14 | 1050286 | 6391.95 | 662 | 645 | 164.2 |
A | 15 | 174 | 306407 | 1861.99 | 662 | 645 | 164.2 |
A | 12 | 80 | 201525 | 1223.29 | 662 | 645 | 164.2 |
B | 12 | 32 | 2489542 | 20165.34 | 578 | 557 | 123.4 |
B | 10 | 128 | 488523 | 3953.42 | 578 | 557 | 123.4 |
B | 10 | 44 | 253574 | 2049.9 | 578 | 557 | 123.4 |
C | 10 | 22 | 964433 | 5319.68 | 660 | 655 | 181.2 |
C | 15 | 192 | 336039 | 1851.19 | 660 | 655 | 181.2 |
C | 5 | 250 | 301496 | 1660.53 | 660 | 655 | 181.2 |
D | 11 | 129 | 3625435 | 21211.82 | 606 | 584 | 170.9 |
D | 8 | 176 | 414430 | 2421.73 | 606 | 584 | 170.9 |
D | 0 | 18 | 356616 | 2083.42 | 606 | 584 | 170.9 |
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 |  |