Observation information
- date-obs: 2025-04-04
- time-obs: 13:00:50.472700000
- date-end: 2025-04-04
- time-end: 15:08:39.448300000
- obs_id: A13_090T01_9000006458
- exposure: 1933.55772358
- 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_51480cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51480cztM0_level2_quad_clean.evt
|
Size (bytes) | 755,841,600 | 83,980,800 |
Size | 720.8 MB
| 80.1 MB
|
Events in quadrant A | 4,962,797 | 614,803 |
Events in quadrant B | 3,718,728 | 695,249 |
Events in quadrant C | 4,016,109 | 604,827 |
Events in quadrant D | 14,769,388 | 168,633 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19100 | 1 |
B | 0 | 15388 | 1 |
C | 0 | 16600 | 1 |
D | 0 | 48428 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 11 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 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 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6589 | 485 | 7.360753% |
B | 6589 | 187 | 2.838063% |
C | 6589 | 345 | 5.235999% |
D | 6589 | 4911 | 74.533313% |
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 | 7668 | 6588 | 162 | 162 | 2.11% | 2.46% |  |
B | 7669 | 6589 | 41 | 41 | 0.53% | 0.62% |  |
C | 7669 | 6590 | 232 | 232 | 3.03% | 3.52% |  |
D | 7669 | 6589 | 4583 | 4583 | 59.76% | 69.56% |  |
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 | 834633 | 4735.52 | 721 | 701 | 176.1 |
A | 12 | 250 | 233296 | 1320.8 | 721 | 701 | 176.1 |
A | 8 | 63 | 194007 | 1097.69 | 721 | 701 | 176.1 |
B | 8 | 234 | 164013 | 1044.3 | 732 | 705 | 156.4 |
B | 10 | 14 | 111367 | 707.65 | 732 | 705 | 156.4 |
B | 10 | 254 | 62947 | 398.02 | 732 | 705 | 156.4 |
C | 13 | 3 | 443288 | 2293.67 | 709 | 702 | 193.0 |
C | 1 | 60 | 383877 | 1985.78 | 709 | 702 | 193.0 |
C | 10 | 171 | 159502 | 822.97 | 709 | 702 | 193.0 |
D | 8 | 176 | 12640765 | 115611.29 | 387 | 374 | 109.3 |
D | 11 | 176 | 306917 | 2803.7 | 387 | 374 | 109.3 |
D | 3 | 12 | 98206 | 894.79 | 387 | 374 | 109.3 |
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 |  |