Observation information
- date-obs: 2025-04-26
- time-obs: 07:29:22.997900000
- date-end: 2025-04-26
- time-end: 09:32:03.978900000
- obs_id: A13_090T01_9000006464
- exposure: 4838.39711708
- 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_51803cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51803cztM0_level2_quad_clean.evt
|
Size (bytes) | 791,429,760 | 88,272,000 |
Size | 754.8 MB
| 84.2 MB
|
Events in quadrant A | 7,551,637 | 587,634 |
Events in quadrant B | 6,612,515 | 625,252 |
Events in quadrant C | 5,350,084 | 570,819 |
Events in quadrant D | 9,244,811 | 405,319 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 5 | 0 |
B | 0 | 5 | 0 |
C | 0 | 5 | 0 |
D | 0 | 5 | 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 | 27391 | 1 |
B | 0 | 24476 | 1 |
C | 0 | 20577 | 1 |
D | 0 | 32226 | 1 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6947 | 708 | 10.191450% |
B | 6947 | 958 | 13.790125% |
C | 6947 | 638 | 9.183820% |
D | 6947 | 2338 | 33.654815% |
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 | 7362 | 6948 | 340 | 340 | 4.62% | 4.89% |  |
B | 7362 | 6948 | 583 | 583 | 7.92% | 8.39% |  |
C | 7362 | 6948 | 363 | 363 | 4.93% | 5.22% |  |
D | 7361 | 6947 | 2016 | 2016 | 27.39% | 29.02% |  |
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 | 2763440 | 15208.55 | 739 | 721 | 181.7 |
A | 13 | 248 | 514358 | 2827.53 | 739 | 721 | 181.7 |
A | 3 | 14 | 318019 | 1746.7 | 739 | 721 | 181.7 |
B | 10 | 128 | 1488162 | 9428.16 | 729 | 703 | 157.8 |
B | 10 | 44 | 968843 | 6136.49 | 729 | 703 | 157.8 |
B | 4 | 206 | 213581 | 1349.31 | 729 | 703 | 157.8 |
C | 10 | 22 | 819503 | 4224.43 | 708 | 703 | 193.8 |
C | 13 | 3 | 550442 | 2836.27 | 708 | 703 | 193.8 |
C | 15 | 218 | 545790 | 2812.26 | 708 | 703 | 193.8 |
D | 11 | 129 | 5439320 | 32550.16 | 606 | 586 | 167.1 |
D | 12 | 6 | 483777 | 2891.84 | 606 | 586 | 167.1 |
D | 8 | 176 | 352773 | 2107.79 | 606 | 586 | 167.1 |
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 |  |