Observation information
- date-obs: 2025-04-23
- time-obs: 20:25:45.597400000
- date-end: 2025-04-23
- time-end: 22:30:01.578500000
- obs_id: A13_090T01_9000006464
- exposure: 5008.30616009
- 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_51766cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51766cztM0_level2_quad_clean.evt
|
| Size (bytes) | 752,696,640 | 83,704,320 |
| Size | 717.8 MB
| 79.8 MB
|
| Events in quadrant A | 4,812,462 | 592,518 |
| Events in quadrant B | 6,393,702 | 577,640 |
| Events in quadrant C | 8,073,486 | 455,200 |
| Events in quadrant D | 8,070,939 | 448,003 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 9 | 0 |
| B | 0 | 9 | 0 |
| C | 0 | 9 | 0 |
| D | 0 | 9 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 132 | 0 |
| B | 0 | 132 | 0 |
| C | 0 | 132 | 0 |
| D | 0 | 132 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 18912 | 1 |
| B | 0 | 23667 | 1 |
| C | 0 | 28410 | 1 |
| D | 0 | 28603 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6612 | 382 | 5.777374% |
| B | 6612 | 1164 | 17.604356% |
| C | 6613 | 1833 | 27.718131% |
| D | 6612 | 1524 | 23.049002% |
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 | 7456 | 6607 | 258 | 258 | 3.46% | 3.90% |  |
| B | 7456 | 6607 | 701 | 701 | 9.40% | 10.61% |  |
| C | 7457 | 6606 | 1430 | 1430 | 19.18% | 21.65% |  |
| D | 7456 | 6607 | 1341 | 1341 | 17.99% | 20.30% |  |
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 | 2 | 143 | 1013358 | 5970.33 | 685 | 669 | 169.6 |
| A | 8 | 249 | 244493 | 1437.47 | 685 | 669 | 169.6 |
| A | 3 | 79 | 100411 | 588.03 | 685 | 669 | 169.6 |
| B | 4 | 206 | 3369390 | 23645.04 | 650 | 625 | 142.5 |
| B | 6 | 51 | 65366 | 454.41 | 650 | 625 | 142.5 |
| B | 4 | 174 | 63381 | 440.47 | 650 | 625 | 142.5 |
| C | 15 | 230 | 3337686 | 20161.1 | 596 | 593 | 165.5 |
| C | 15 | 218 | 1670070 | 10086.17 | 596 | 593 | 165.5 |
| C | 9 | 38 | 219193 | 1320.68 | 596 | 593 | 165.5 |
| D | 11 | 129 | 5027349 | 29587.62 | 602 | 581 | 169.9 |
| D | 8 | 176 | 278348 | 1634.94 | 602 | 581 | 169.9 |
| D | 3 | 12 | 156681 | 918.81 | 602 | 581 | 169.9 |
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 |  |