Observation information
- date-obs: 2025-04-24
- time-obs: 11:53:21.437300000
- date-end: 2025-04-24
- time-end: 14:07:24.415500000
- obs_id: A13_090T01_9000006464
- exposure: 5535.38170856
- 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_51776cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51776cztM0_level2_quad_clean.evt
|
Size (bytes) | 751,406,400 | 109,350,720 |
Size | 716.6 MB
| 104.3 MB
|
Events in quadrant A | 5,507,165 | 746,386 |
Events in quadrant B | 4,689,331 | 812,481 |
Events in quadrant C | 5,633,952 | 717,994 |
Events in quadrant D | 11,361,168 | 474,568 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 162 | 0 |
B | 0 | 162 | 0 |
C | 0 | 162 | 0 |
D | 0 | 162 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 21852 | 0 |
B | 0 | 19534 | 0 |
C | 0 | 22117 | 0 |
D | 0 | 39282 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 8043 | 169 | 2.101206% |
B | 8043 | 139 | 1.728211% |
C | 8043 | 294 | 3.655352% |
D | 8044 | 2781 | 34.572352% |
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 | 8043 | 8043 | 91 | 91 | 1.13% | 1.13% |  |
B | 8043 | 8043 | 68 | 68 | 0.85% | 0.85% |  |
C | 8043 | 8043 | 213 | 213 | 2.65% | 2.65% |  |
D | 8044 | 8044 | 2417 | 2417 | 30.05% | 30.05% |  |
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 | 620045 | 2890.19 | 877 | 855 | 214.2 |
A | 2 | 143 | 272828 | 1269.49 | 877 | 855 | 214.2 |
A | 4 | 3 | 154819 | 718.66 | 877 | 855 | 214.2 |
B | 4 | 206 | 339814 | 1799.08 | 872 | 842 | 188.4 |
B | 10 | 44 | 188650 | 996.78 | 872 | 842 | 188.4 |
B | 4 | 174 | 148805 | 785.31 | 872 | 842 | 188.4 |
C | 3 | 242 | 538571 | 2339.06 | 848 | 845 | 229.9 |
C | 0 | 209 | 427712 | 1856.84 | 848 | 845 | 229.9 |
C | 9 | 38 | 346792 | 1504.84 | 848 | 845 | 229.9 |
D | 11 | 129 | 7789546 | 39463.71 | 709 | 683 | 197.4 |
D | 10 | 181 | 273433 | 1381.94 | 709 | 683 | 197.4 |
D | 7 | 159 | 147886 | 745.83 | 709 | 683 | 197.4 |
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 |  |