Observation information
- date-obs: 2025-04-21
- time-obs: 12:52:36.153300000
- date-end: 2025-04-21
- time-end: 14:59:36.133000000
- obs_id: A13_090T01_9000006464
- exposure: 4013.46564227
- 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_51732cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51732cztM0_level2_quad_clean.evt
|
Size (bytes) | 824,771,520 | 113,140,800 |
Size | 786.6 MB
| 107.9 MB
|
Events in quadrant A | 6,038,237 | 845,044 |
Events in quadrant B | 5,189,420 | 857,286 |
Events in quadrant C | 4,834,046 | 760,243 |
Events in quadrant D | 13,878,830 | 433,156 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 152 | 0 |
B | 0 | 152 | 0 |
C | 0 | 152 | 0 |
D | 0 | 152 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 23279 | 0 |
B | 0 | 20576 | 0 |
C | 0 | 19682 | 0 |
D | 0 | 46506 | 5 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7620 | 319 | 4.186352% |
B | 7621 | 234 | 3.070463% |
C | 7621 | 206 | 2.703057% |
D | 7620 | 4036 | 52.965879% |
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 | 7620 | 7620 | 270 | 270 | 3.54% | 3.54% |  |
B | 7621 | 7621 | 182 | 182 | 2.39% | 2.39% |  |
C | 7621 | 7621 | 175 | 175 | 2.30% | 2.30% |  |
D | 7619 | 7619 | 3806 | 3806 | 49.95% | 49.95% |  |
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 | 844340 | 3824.77 | 862 | 843 | 220.5 |
A | 0 | 111 | 807734 | 3658.79 | 862 | 843 | 220.5 |
A | 4 | 175 | 197287 | 890.76 | 862 | 843 | 220.5 |
B | 4 | 174 | 491533 | 2704.33 | 838 | 811 | 181.5 |
B | 4 | 206 | 218031 | 1197.08 | 838 | 811 | 181.5 |
B | 10 | 254 | 179870 | 986.78 | 838 | 811 | 181.5 |
C | 13 | 3 | 411950 | 1776.42 | 820 | 812 | 231.4 |
C | 12 | 249 | 170708 | 734.08 | 820 | 812 | 231.4 |
C | 3 | 233 | 155612 | 668.85 | 820 | 812 | 231.4 |
D | 11 | 129 | 10398246 | 58218.66 | 610 | 586 | 178.6 |
D | 7 | 159 | 205417 | 1146.89 | 610 | 586 | 178.6 |
D | 2 | 249 | 156921 | 875.35 | 610 | 586 | 178.6 |
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 |  |