Observation information
- date-obs: 2026-02-19
- time-obs: 18:55:43.626700000
- date-end: 2026-02-20
- time-end: 02:08:55.566400000
- obs_id: A14_049T01_9000006552
- exposure: 13700.1964639
- sourceid: NGC 1487
- observer: amrutha
- ra_pnt: 58.94208
- dec_pnt: -42.36806
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1A14_049T01_9000006552_56255cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56255cztM0_level2_quad_clean.evt
|
| Size (bytes) | 2,351,862,720 | 289,287,360 |
| Size | 2.2 GB
| 275.9 MB
|
| Events in quadrant A | 42,515,532 | 911,493 |
| Events in quadrant B | 12,884,752 | 2,307,650 |
| Events in quadrant C | 14,068,346 | 2,022,789 |
| Events in quadrant D | 15,759,641 | 1,883,085 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 484 | 0 |
| B | 0 | 484 | 0 |
| C | 0 | 484 | 0 |
| D | 0 | 484 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 22 | 0 |
| B | 0 | 22 | 0 |
| C | 0 | 22 | 0 |
| D | 0 | 22 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 142843 | 5 |
| B | 0 | 55361 | 6 |
| C | 0 | 59147 | 5 |
| D | 0 | 64016 | 5 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 23717 | 10932 | 46.093519% |
| B | 23716 | 542 | 2.285377% |
| C | 23717 | 822 | 3.465868% |
| D | 23717 | 986 | 4.157355% |
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 | 26276 | 23912 | 9390 | 9390 | 35.74% | 39.27% |  |
| B | 26275 | 24005 | 224 | 224 | 0.85% | 0.93% |  |
| C | 26276 | 24002 | 587 | 587 | 2.23% | 2.45% |  |
| D | 26276 | 24006 | 939 | 939 | 3.57% | 3.91% |  |
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 | 15 | 32 | 16727823 | 33754.22 | 1989 | 1941 | 495.5 |
| A | 8 | 176 | 10733302 | 21656.78 | 1989 | 1941 | 495.5 |
| A | 4 | 95 | 1635919 | 3297.5 | 1989 | 1941 | 495.5 |
| B | 5 | 185 | 963676 | 1843.1 | 2470 | 2379 | 521.6 |
| B | 4 | 171 | 450262 | 858.73 | 2470 | 2379 | 521.6 |
| B | 10 | 247 | 390364 | 743.89 | 2470 | 2379 | 521.6 |
| C | 12 | 254 | 1776064 | 2715.31 | 2398 | 2377 | 653.2 |
| C | 6 | 223 | 635554 | 969.32 | 2398 | 2377 | 653.2 |
| C | 12 | 252 | 592747 | 903.79 | 2398 | 2377 | 653.2 |
| D | 8 | 129 | 3203120 | 4712.11 | 2388 | 2278 | 679.3 |
| D | 2 | 249 | 1475856 | 2169.32 | 2388 | 2278 | 679.3 |
| D | 15 | 115 | 651548 | 955.82 | 2388 | 2278 | 679.3 |
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 |  |