Observation information
- date-obs: 2025-04-03
- time-obs: 11:03:30.765800000
- date-end: 2025-04-03
- time-end: 13:07:53.740300000
- obs_id: A13_090T01_9000006458
- exposure: 4877.5105381
- 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_51464cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51464cztM0_level2_quad_clean.evt
|
Size (bytes) | 615,225,600 | 88,980,480 |
Size | 586.7 MB
| 84.9 MB
|
Events in quadrant A | 8,818,934 | 476,182 |
Events in quadrant B | 4,322,339 | 648,100 |
Events in quadrant C | 3,282,351 | 592,873 |
Events in quadrant D | 5,851,125 | 527,689 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 30620 | 1 |
B | 0 | 17159 | 1 |
C | 0 | 14546 | 1 |
D | 0 | 21817 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 10 | 0 |
B | 0 | 10 | 0 |
C | 0 | 10 | 0 |
D | 0 | 10 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 132 | 0 |
B | 0 | 132 | 0 |
C | 0 | 132 | 0 |
D | 0 | 132 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6433 | 1842 | 28.633608% |
B | 6434 | 307 | 4.771526% |
C | 6434 | 134 | 2.082686% |
D | 6434 | 526 | 8.175319% |
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 | 7463 | 6434 | 1514 | 1514 | 20.29% | 23.53% |  |
B | 7464 | 6435 | 114 | 114 | 1.53% | 1.77% |  |
C | 7464 | 6435 | 75 | 75 | 1.00% | 1.17% |  |
D | 7464 | 6435 | 482 | 482 | 6.46% | 7.49% |  |
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 | 8 | 249 | 2203890 | 13815.72 | 649 | 635 | 159.5 |
A | 12 | 3 | 1041161 | 6524.72 | 649 | 635 | 159.5 |
A | 12 | 250 | 950705 | 5957.5 | 649 | 635 | 159.5 |
B | 8 | 234 | 339261 | 2301.36 | 688 | 665 | 147.1 |
B | 4 | 206 | 316902 | 2149.39 | 688 | 665 | 147.1 |
B | 10 | 254 | 261781 | 1774.75 | 688 | 665 | 147.1 |
C | 13 | 3 | 278369 | 1497.69 | 681 | 676 | 185.4 |
C | 14 | 254 | 140335 | 753.23 | 681 | 676 | 185.4 |
C | 12 | 250 | 107575 | 576.54 | 681 | 676 | 185.4 |
D | 8 | 176 | 1190849 | 6370.09 | 666 | 642 | 186.8 |
D | 3 | 12 | 970960 | 5193.22 | 666 | 642 | 186.8 |
D | 6 | 42 | 324028 | 1730.79 | 666 | 642 | 186.8 |
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 |  |