Observation information
- date-obs: 2025-04-22
- time-obs: 01:02:46.354600000
- date-end: 2025-04-22
- time-end: 03:09:44.013100000
- obs_id: A13_090T01_9000006464
- exposure: 4203.36802197
- 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_51740cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51740cztM0_level2_quad_clean.evt
|
Size (bytes) | 795,173,760 | 84,222,720 |
Size | 758.3 MB
| 80.3 MB
|
Events in quadrant A | 6,625,735 | 607,611 |
Events in quadrant B | 4,819,138 | 642,519 |
Events in quadrant C | 8,673,540 | 392,674 |
Events in quadrant D | 8,808,327 | 449,124 |
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 | 132 | 0 |
B | 0 | 132 | 0 |
C | 0 | 132 | 0 |
D | 0 | 132 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 24206 | 1 |
B | 0 | 18797 | 1 |
C | 0 | 30254 | 1 |
D | 0 | 30735 | 1 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6568 | 415 | 6.318514% |
B | 6569 | 527 | 8.022530% |
C | 6569 | 2478 | 37.722637% |
D | 6569 | 1736 | 26.427158% |
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 | 7618 | 6568 | 346 | 346 | 4.54% | 5.27% |  |
B | 7619 | 6569 | 327 | 327 | 4.29% | 4.98% |  |
C | 7619 | 6569 | 2308 | 2308 | 30.29% | 35.13% |  |
D | 7619 | 6569 | 1747 | 1747 | 22.93% | 26.59% |  |
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 | 2542669 | 14750.37 | 698 | 680 | 172.3 |
A | 4 | 175 | 380172 | 2202.07 | 698 | 680 | 172.3 |
A | 12 | 3 | 334434 | 1936.67 | 698 | 680 | 172.3 |
B | 10 | 44 | 1013299 | 6884.33 | 684 | 659 | 147.1 |
B | 4 | 206 | 310348 | 2105.39 | 684 | 659 | 147.1 |
B | 10 | 254 | 253172 | 1716.68 | 684 | 659 | 147.1 |
C | 9 | 38 | 5438630 | 36760.48 | 538 | 534 | 147.9 |
C | 15 | 178 | 137853 | 928.25 | 538 | 534 | 147.9 |
C | 13 | 3 | 137727 | 927.4 | 538 | 534 | 147.9 |
D | 11 | 129 | 5294217 | 30636.27 | 616 | 595 | 172.8 |
D | 8 | 176 | 824109 | 4766.0 | 616 | 595 | 172.8 |
D | 2 | 120 | 72694 | 417.27 | 616 | 595 | 172.8 |
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 |  |