Observation information
- date-obs: 2025-04-23
- time-obs: 04:38:47.756100000
- date-end: 2025-04-23
- time-end: 06:51:15.733600000
- obs_id: A13_090T01_9000006464
- exposure: 5603.13083625
- 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_51757cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51757cztM0_level2_quad_clean.evt
|
Size (bytes) | 616,184,640 | 91,923,840 |
Size | 587.6 MB
| 87.7 MB
|
Events in quadrant A | 4,692,287 | 620,130 |
Events in quadrant B | 6,342,259 | 609,775 |
Events in quadrant C | 5,552,672 | 557,595 |
Events in quadrant D | 5,718,171 | 543,093 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 15 | 0 |
B | 0 | 16 | 0 |
C | 0 | 16 | 0 |
D | 0 | 16 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 130 | 0 |
B | 0 | 130 | 0 |
C | 0 | 130 | 0 |
D | 0 | 130 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 18409 | 4 |
B | 0 | 23284 | 2 |
C | 0 | 21011 | 2 |
D | 0 | 21468 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6497 | 311 | 4.786825% |
B | 6497 | 1059 | 16.299831% |
C | 6497 | 895 | 13.775589% |
D | 6497 | 654 | 10.066184% |
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 | 7637 | 6498 | 189 | 189 | 2.47% | 2.91% |  |
B | 7637 | 6498 | 689 | 689 | 9.02% | 10.60% |  |
C | 7637 | 6497 | 629 | 629 | 8.24% | 9.68% |  |
D | 7637 | 6497 | 495 | 495 | 6.48% | 7.62% |  |
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 | 865357 | 4980.7 | 710 | 693 | 173.6 |
A | 15 | 174 | 571383 | 3287.33 | 710 | 693 | 173.6 |
A | 12 | 194 | 104362 | 597.16 | 710 | 693 | 173.6 |
B | 4 | 206 | 2744575 | 19003.92 | 674 | 649 | 144.4 |
B | 7 | 0 | 411315 | 2844.19 | 674 | 649 | 144.4 |
B | 9 | 223 | 68562 | 470.35 | 674 | 649 | 144.4 |
C | 15 | 230 | 2272657 | 12381.31 | 667 | 661 | 183.5 |
C | 13 | 3 | 151623 | 822.67 | 667 | 661 | 183.5 |
C | 14 | 96 | 151071 | 819.66 | 667 | 661 | 183.5 |
D | 11 | 129 | 2182884 | 11396.27 | 684 | 661 | 191.5 |
D | 8 | 176 | 324250 | 1689.89 | 684 | 661 | 191.5 |
D | 12 | 32 | 231608 | 1206.08 | 684 | 661 | 191.5 |
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 |  |