Observation information
- date-obs: 2026-02-20
- time-obs: 17:27:51.442400000
- date-end: 2026-02-20
- time-end: 20:27:28.423900000
- obs_id: A14_049T01_9000006552
- exposure: 6584.67732793
- 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_56268cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56268cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,233,023,040 | 109,215,360 |
| Size | 1.1 GB
| 104.2 MB
|
| Events in quadrant A | 17,726,461 | 522,733 |
| Events in quadrant B | 6,259,740 | 827,759 |
| Events in quadrant C | 13,250,749 | 540,197 |
| Events in quadrant D | 7,572,999 | 669,190 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 214 | 0 |
| B | 0 | 214 | 0 |
| C | 0 | 214 | 0 |
| D | 0 | 214 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 60305 | 6 |
| B | 0 | 26112 | 0 |
| C | 0 | 46855 | 0 |
| D | 0 | 30267 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 10776 | 4784 | 44.394952% |
| B | 10776 | 329 | 3.053081% |
| C | 10777 | 3116 | 28.913427% |
| D | 10777 | 537 | 4.982834% |
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 | 11065 | 11055 | 4116 | 4116 | 37.20% | 37.23% |  |
| B | 11066 | 11061 | 149 | 149 | 1.35% | 1.35% |  |
| C | 11066 | 11013 | 2421 | 2421 | 21.88% | 21.98% |  |
| D | 11067 | 11063 | 485 | 485 | 4.38% | 4.38% |  |
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 | 6020461 | 27116.31 | 893 | 875 | 222.0 |
| A | 8 | 176 | 4710109 | 21213.6 | 893 | 875 | 222.0 |
| A | 14 | 235 | 1057863 | 4761.39 | 893 | 875 | 222.0 |
| B | 5 | 185 | 371489 | 1541.56 | 1124 | 1083 | 240.3 |
| B | 0 | 171 | 344165 | 1427.84 | 1124 | 1083 | 240.3 |
| B | 4 | 171 | 265592 | 1100.84 | 1124 | 1083 | 240.3 |
| C | 15 | 230 | 5712870 | 22116.94 | 939 | 931 | 258.3 |
| C | 12 | 254 | 3219774 | 12463.54 | 939 | 931 | 258.3 |
| C | 12 | 252 | 249889 | 963.98 | 939 | 931 | 258.3 |
| D | 2 | 249 | 2099849 | 6764.93 | 1081 | 1030 | 310.2 |
| D | 8 | 129 | 574422 | 1848.16 | 1081 | 1030 | 310.2 |
| D | 11 | 129 | 190542 | 610.84 | 1081 | 1030 | 310.2 |
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 |  |