Observation information
- date-obs: 2026-02-22
- time-obs: 23:07:05.158300000
- date-end: 2026-02-23
- time-end: 01:14:29.996600000
- obs_id: A14_049T01_9000006552
- exposure: 2508.07703584
- 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_56299cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56299cztM0_level2_quad_clean.evt
|
| Size (bytes) | 743,299,200 | 85,150,080 |
| Size | 708.9 MB
| 81.2 MB
|
| Events in quadrant A | 14,143,834 | 259,085 |
| Events in quadrant B | 3,891,022 | 681,769 |
| Events in quadrant C | 4,576,871 | 585,556 |
| Events in quadrant D | 4,380,792 | 582,460 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 138 | 0 |
| B | 0 | 138 | 0 |
| C | 0 | 138 | 0 |
| D | 0 | 138 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 9 | 0 |
| B | 0 | 9 | 0 |
| C | 0 | 9 | 0 |
| D | 0 | 9 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 46650 | 1 |
| B | 0 | 16266 | 1 |
| C | 0 | 18532 | 2 |
| D | 0 | 17721 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6726 | 4551 | 67.662801% |
| B | 6726 | 241 | 3.583110% |
| C | 6725 | 500 | 7.434944% |
| D | 6725 | 177 | 2.631970% |
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 | 7645 | 6725 | 4459 | 4459 | 58.33% | 66.30% |  |
| B | 7645 | 6725 | 161 | 161 | 2.11% | 2.39% |  |
| C | 7644 | 6724 | 443 | 443 | 5.80% | 6.59% |  |
| D | 7644 | 6724 | 182 | 182 | 2.38% | 2.71% |  |
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 | 9054478 | 74261.74 | 479 | 468 | 121.9 |
| A | 7 | 64 | 1067257 | 8749.89 | 479 | 468 | 121.9 |
| A | 4 | 206 | 650683 | 5333.12 | 479 | 468 | 121.9 |
| B | 5 | 185 | 492872 | 3273.15 | 697 | 671 | 150.4 |
| B | 10 | 247 | 150857 | 998.74 | 697 | 671 | 150.4 |
| B | 5 | 172 | 137954 | 912.94 | 697 | 671 | 150.4 |
| C | 15 | 198 | 692812 | 3687.4 | 669 | 663 | 187.7 |
| C | 5 | 250 | 583831 | 3106.8 | 669 | 663 | 187.7 |
| C | 12 | 252 | 473750 | 2520.35 | 669 | 663 | 187.7 |
| D | 2 | 249 | 497592 | 2533.44 | 680 | 647 | 196.2 |
| D | 8 | 129 | 388337 | 1976.46 | 680 | 647 | 196.2 |
| D | 5 | 32 | 167449 | 850.36 | 680 | 647 | 196.2 |
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 |  |