Observation information
- date-obs: 2026-06-24
- time-obs: 21:52:33.918200000
- date-end: 2026-06-25
- time-end: 03:39:57.859000000
- obs_id: A14_042T02_9000006586
- exposure: 17952.6138373
- 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_58114cztM0_level2.fits
| modeM0/AS1A14_042T02_9000006586_58114cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,446,978,240 | 275,474,880 |
| Size | 1.3 GB
| 262.7 MB
|
| Events in quadrant A | 8,988,383 | 1,832,140 |
| Events in quadrant B | 15,839,592 | 1,870,457 |
| Events in quadrant C | 9,043,714 | 1,756,729 |
| Events in quadrant D | 18,166,514 | 1,523,017 |
Level1 data integrity
| 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 | 398 | 0 |
| B | 0 | 398 | 0 |
| C | 0 | 398 | 0 |
| D | 0 | 398 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 41196 | 3 |
| B | 0 | 60460 | 3 |
| C | 0 | 41683 | 8 |
| D | 0 | 67380 | 3 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 19714 | 255 | 1.293497% |
| B | 19715 | 1501 | 7.613492% |
| C | 19713 | 159 | 0.806574% |
| D | 19714 | 1941 | 9.845795% |
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 | 20844 | 19717 | 26 | 26 | 0.12% | 0.13% |  |
| B | 20845 | 19718 | 796 | 796 | 3.82% | 4.04% |  |
| C | 20845 | 19717 | 28 | 28 | 0.13% | 0.14% |  |
| D | 20844 | 19717 | 1709 | 1709 | 8.20% | 8.67% |  |
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 | 11 | 3 | 160497 | 292.39 | 2202 | 2144 | 541.6 |
| A | 3 | 245 | 126570 | 229.75 | 2202 | 2144 | 541.6 |
| A | 3 | 14 | 71853 | 128.71 | 2202 | 2144 | 541.6 |
| B | 10 | 128 | 6142666 | 13547.33 | 2111 | 2021 | 453.3 |
| B | 5 | 172 | 499988 | 1098.6 | 2111 | 2021 | 453.3 |
| B | 4 | 171 | 227172 | 496.72 | 2111 | 2021 | 453.3 |
| C | 9 | 38 | 225001 | 385.87 | 2131 | 2117 | 577.6 |
| C | 12 | 252 | 180589 | 308.98 | 2131 | 2117 | 577.6 |
| C | 12 | 250 | 88738 | 149.96 | 2131 | 2117 | 577.6 |
| D | 12 | 110 | 7963217 | 13705.95 | 2054 | 1964 | 580.9 |
| D | 2 | 249 | 618035 | 1060.62 | 2054 | 1964 | 580.9 |
| D | 8 | 160 | 547760 | 939.63 | 2054 | 1964 | 580.9 |
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 |  |