Observation information
- date-obs: 2025-04-03
- time-obs: 14:37:02.723100000
- date-end: 2025-04-03
- time-end: 16:34:16.702000000
- obs_id: A13_090T01_9000006458
- exposure: 1624.66629654
- 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_9000006458_51466cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51466cztM0_level2_quad_clean.evt
|
| Size (bytes) | 748,765,440 | 73,437,120 |
| Size | 714.1 MB
| 70.0 MB
|
| Events in quadrant A | 6,466,316 | 508,076 |
| Events in quadrant B | 4,519,618 | 607,652 |
| Events in quadrant C | 3,341,598 | 548,275 |
| Events in quadrant D | 12,931,629 | 147,031 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 23243 | 1 |
| B | 0 | 17509 | 1 |
| C | 0 | 14138 | 1 |
| D | 0 | 42538 | 1 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 12 | 0 |
| B | 0 | 12 | 0 |
| C | 0 | 12 | 0 |
| D | 0 | 12 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 120 | 0 |
| B | 0 | 120 | 0 |
| C | 0 | 120 | 0 |
| D | 0 | 120 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 5904 | 1001 | 16.954607% |
| B | 5905 | 364 | 6.164268% |
| C | 5905 | 218 | 3.691787% |
| D | 5905 | 4412 | 74.716342% |
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 | 7034 | 5905 | 896 | 896 | 12.74% | 15.17% |  |
| B | 7035 | 5906 | 140 | 140 | 1.99% | 2.37% |  |
| C | 7035 | 5906 | 133 | 133 | 1.89% | 2.25% |  |
| D | 7035 | 5906 | 3796 | 3796 | 53.96% | 64.27% |  |
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 | 8 | 249 | 1738166 | 11304.68 | 632 | 617 | 153.7 |
| A | 4 | 175 | 1308121 | 8506.76 | 632 | 617 | 153.7 |
| A | 12 | 3 | 358322 | 2327.27 | 632 | 617 | 153.7 |
| B | 10 | 254 | 888857 | 6518.65 | 640 | 619 | 136.3 |
| B | 4 | 206 | 533661 | 3911.92 | 640 | 619 | 136.3 |
| B | 7 | 252 | 107729 | 786.06 | 640 | 619 | 136.3 |
| C | 13 | 3 | 505854 | 2870.7 | 635 | 628 | 176.0 |
| C | 12 | 252 | 77027 | 434.1 | 635 | 628 | 176.0 |
| C | 12 | 250 | 49734 | 279.02 | 635 | 628 | 176.0 |
| D | 8 | 176 | 10523695 | 114881.55 | 323 | 312 | 91.6 |
| D | 6 | 42 | 567650 | 6193.51 | 323 | 312 | 91.6 |
| D | 3 | 12 | 340120 | 3709.61 | 323 | 312 | 91.6 |
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 |  |