Observation information
- date-obs: 2025-04-24
- time-obs: 23:49:00.317000000
- date-end: 2025-04-25
- time-end: 02:18:45.290000000
- obs_id: A13_090T01_9000006464
- exposure: 5836.63588768
- 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_51784cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51784cztM0_level2_quad_clean.evt
|
Size (bytes) | 597,038,400 | 98,285,760 |
Size | 569.4 MB
| 93.7 MB
|
Events in quadrant A | 4,737,115 | 654,873 |
Events in quadrant B | 4,785,479 | 716,641 |
Events in quadrant C | 5,258,497 | 608,919 |
Events in quadrant D | 6,790,277 | 520,395 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22 | 0 |
B | 0 | 22 | 0 |
C | 0 | 22 | 0 |
D | 0 | 22 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 138 | 0 |
B | 0 | 138 | 0 |
C | 0 | 138 | 0 |
D | 0 | 138 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 18684 | 2 |
B | 0 | 18962 | 2 |
C | 0 | 20101 | 2 |
D | 0 | 24957 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6825 | 215 | 3.150183% |
B | 6826 | 239 | 3.501318% |
C | 6826 | 482 | 7.061236% |
D | 6826 | 1125 | 16.481102% |
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 | 8985 | 6827 | 223 | 223 | 2.48% | 3.27% |  |
B | 8986 | 6827 | 135 | 135 | 1.50% | 1.98% |  |
C | 8986 | 6828 | 427 | 427 | 4.75% | 6.25% |  |
D | 8986 | 6827 | 1001 | 1001 | 11.14% | 14.66% |  |
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 | 11 | 14 | 442727 | 2444.34 | 736 | 719 | 180.8 |
A | 11 | 3 | 373666 | 2062.43 | 736 | 719 | 180.8 |
A | 3 | 14 | 194316 | 1070.61 | 736 | 719 | 180.8 |
B | 4 | 206 | 1077760 | 6849.0 | 737 | 710 | 157.3 |
B | 4 | 174 | 208467 | 1321.13 | 737 | 710 | 157.3 |
B | 0 | 171 | 163979 | 1038.23 | 737 | 710 | 157.3 |
C | 15 | 218 | 956221 | 4939.72 | 705 | 700 | 193.4 |
C | 9 | 38 | 265116 | 1366.94 | 705 | 700 | 193.4 |
C | 11 | 227 | 226167 | 1165.59 | 705 | 700 | 193.4 |
D | 11 | 129 | 2877638 | 15420.58 | 666 | 642 | 186.6 |
D | 3 | 12 | 829560 | 4442.97 | 666 | 642 | 186.6 |
D | 10 | 172 | 130737 | 697.3 | 666 | 642 | 186.6 |
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 |  |