Observation information
- date-obs: 2026-02-22
- time-obs: 20:22:18.403000000
- date-end: 2026-02-22
- time-end: 23:32:03.012000000
- obs_id: A14_049T01_9000006552
- exposure: 4261.42776972
- 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_56298cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56298cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,112,132,160 | 120,536,640 |
| Size | 1.0 GB
| 115.0 MB
|
| Events in quadrant A | 19,903,857 | 403,530 |
| Events in quadrant B | 5,495,292 | 975,528 |
| Events in quadrant C | 9,254,078 | 746,910 |
| Events in quadrant D | 5,738,388 | 828,382 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 206 | 0 |
| B | 0 | 206 | 0 |
| C | 0 | 206 | 0 |
| D | 0 | 206 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 13 | 0 |
| B | 0 | 13 | 0 |
| C | 0 | 13 | 0 |
| D | 0 | 13 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 66033 | 3 |
| B | 0 | 23646 | 2 |
| C | 0 | 34635 | 2 |
| D | 0 | 23978 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 10019 | 6150 | 61.383372% |
| B | 10020 | 293 | 2.924152% |
| C | 10020 | 1724 | 17.205589% |
| D | 10020 | 182 | 1.816367% |
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 | 11383 | 10018 | 5952 | 5952 | 52.29% | 59.41% |  |
| B | 11385 | 10021 | 198 | 198 | 1.74% | 1.98% |  |
| C | 11385 | 10020 | 1445 | 1445 | 12.69% | 14.42% |  |
| D | 11385 | 10022 | 165 | 165 | 1.45% | 1.65% |  |
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 | 14608355 | 82062.59 | 704 | 685 | 178.0 |
| A | 4 | 95 | 691001 | 3878.04 | 704 | 685 | 178.0 |
| A | 4 | 206 | 470034 | 2636.7 | 704 | 685 | 178.0 |
| B | 5 | 185 | 698951 | 3168.06 | 1040 | 1003 | 220.3 |
| B | 0 | 231 | 223623 | 1010.49 | 1040 | 1003 | 220.3 |
| B | 0 | 213 | 113502 | 510.64 | 1040 | 1003 | 220.3 |
| C | 15 | 198 | 2204194 | 8511.73 | 943 | 936 | 258.8 |
| C | 5 | 250 | 1075710 | 4152.12 | 943 | 936 | 258.8 |
| C | 12 | 252 | 857327 | 3308.45 | 943 | 936 | 258.8 |
| D | 2 | 249 | 591475 | 2042.75 | 1018 | 973 | 289.1 |
| D | 8 | 129 | 363776 | 1255.06 | 1018 | 973 | 289.1 |
| D | 2 | 31 | 147962 | 508.49 | 1018 | 973 | 289.1 |
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 |  |