Observation information
- date-obs: 2025-04-23
- time-obs: 10:00:38.701200000
- date-end: 2025-04-23
- time-end: 12:06:50.680200000
- obs_id: A13_090T01_9000006464
- exposure: 3450.41736257
- 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_51760cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51760cztM0_level2_quad_clean.evt
|
Size (bytes) | 787,786,560 | 94,936,320 |
Size | 751.3 MB
| 90.5 MB
|
Events in quadrant A | 5,186,367 | 674,473 |
Events in quadrant B | 6,643,575 | 676,192 |
Events in quadrant C | 3,895,357 | 691,305 |
Events in quadrant D | 12,848,164 | 305,792 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 150 | 0 |
B | 0 | 150 | 0 |
C | 0 | 150 | 0 |
D | 0 | 150 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 20692 | 0 |
B | 0 | 25019 | 0 |
C | 0 | 17027 | 0 |
D | 0 | 43478 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7572 | 397 | 5.243001% |
B | 7573 | 1085 | 14.327215% |
C | 7573 | 133 | 1.756239% |
D | 7573 | 4379 | 57.823848% |
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 | 7572 | 7572 | 59 | 59 | 0.78% | 0.78% |  |
B | 7573 | 7573 | 492 | 492 | 6.50% | 6.50% |  |
C | 7573 | 7573 | 47 | 47 | 0.62% | 0.62% |  |
D | 7573 | 7570 | 2953 | 2953 | 38.99% | 39.01% |  |
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 | 948054 | 4540.17 | 858 | 836 | 208.6 |
A | 12 | 3 | 258627 | 1235.63 | 858 | 836 | 208.6 |
A | 13 | 248 | 125551 | 597.78 | 858 | 836 | 208.6 |
B | 4 | 206 | 2401591 | 13370.26 | 818 | 788 | 179.6 |
B | 1 | 223 | 262115 | 1455.35 | 818 | 788 | 179.6 |
B | 0 | 216 | 137264 | 760.05 | 818 | 788 | 179.6 |
C | 3 | 233 | 121880 | 528.48 | 841 | 837 | 229.0 |
C | 0 | 192 | 120696 | 523.31 | 841 | 837 | 229.0 |
C | 15 | 189 | 96696 | 418.53 | 841 | 837 | 229.0 |
D | 11 | 129 | 9382547 | 61123.0 | 549 | 529 | 153.5 |
D | 15 | 94 | 621107 | 4043.01 | 549 | 529 | 153.5 |
D | 7 | 222 | 157964 | 1025.67 | 549 | 529 | 153.5 |
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 |  |