Observation information
- date-obs: 2026-07-01
- time-obs: 18:42:19.242900000
- date-end: 2026-07-02
- time-end: 00:23:36.185100000
- obs_id: A14_042T02_9000006586
- exposure: 18074.1210558
- sourceid: NGC4038
- observer: pshalima
- ra_pnt: 180.4708
- dec_pnt: -18.86759
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1A14_042T02_9000006586_58216cztM0_level2.fits
| modeM0/AS1A14_042T02_9000006586_58216cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,195,755,840 | 266,909,760 |
| Size | 1.1 GB
| 254.5 MB
|
| Events in quadrant A | 9,088,450 | 1,752,764 |
| Events in quadrant B | 11,570,945 | 1,837,941 |
| Events in quadrant C | 8,703,930 | 1,665,935 |
| Events in quadrant D | 13,438,417 | 1,524,798 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 17 | 0 |
| B | 0 | 17 | 0 |
| C | 0 | 17 | 0 |
| D | 0 | 17 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 380 | 0 |
| B | 0 | 380 | 0 |
| C | 0 | 380 | 0 |
| D | 0 | 380 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 41401 | 3 |
| B | 0 | 47120 | 3 |
| C | 0 | 40228 | 3 |
| D | 0 | 53308 | 6 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 18873 | 303 | 1.605468% |
| B | 18873 | 604 | 3.200339% |
| C | 18873 | 125 | 0.662322% |
| D | 18872 | 842 | 4.461636% |
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 | 20478 | 18875 | 220 | 220 | 1.07% | 1.17% |  |
| B | 20478 | 18874 | 330 | 330 | 1.61% | 1.75% |  |
| C | 20478 | 18875 | 97 | 97 | 0.47% | 0.51% |  |
| D | 20477 | 18875 | 855 | 855 | 4.18% | 4.53% |  |
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 | 13 | 248 | 421753 | 845.94 | 2014 | 1964 | 496.2 |
| A | 8 | 246 | 386356 | 774.61 | 2014 | 1964 | 496.2 |
| A | 10 | 251 | 353179 | 707.75 | 2014 | 1964 | 496.2 |
| B | 10 | 128 | 1506636 | 3558.9 | 1974 | 1898 | 422.8 |
| B | 2 | 249 | 606971 | 1431.07 | 1974 | 1898 | 422.8 |
| B | 4 | 236 | 421958 | 993.5 | 1974 | 1898 | 422.8 |
| C | 12 | 252 | 473004 | 888.64 | 1945 | 1932 | 530.1 |
| C | 6 | 223 | 282217 | 528.74 | 1945 | 1932 | 530.1 |
| C | 14 | 254 | 94742 | 175.08 | 1945 | 1932 | 530.1 |
| D | 12 | 110 | 2010349 | 3689.79 | 1919 | 1832 | 544.3 |
| D | 2 | 31 | 832971 | 1526.86 | 1919 | 1832 | 544.3 |
| D | 3 | 224 | 619763 | 1135.18 | 1919 | 1832 | 544.3 |
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 |  |