Observation information
- date-obs: 2026-02-22
- time-obs: 00:33:50.197500000
- date-end: 2026-02-22
- time-end: 02:40:15.178400000
- obs_id: A14_049T01_9000006552
- exposure: 3171.36974841
- 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_56286cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56286cztM0_level2_quad_clean.evt
|
| Size (bytes) | 711,578,880 | 83,724,480 |
| Size | 678.6 MB
| 79.8 MB
|
| Events in quadrant A | 12,541,763 | 304,791 |
| Events in quadrant B | 3,821,365 | 661,415 |
| Events in quadrant C | 5,662,347 | 560,293 |
| Events in quadrant D | 3,804,180 | 549,186 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 134 | 0 |
| B | 0 | 134 | 0 |
| C | 0 | 134 | 0 |
| D | 0 | 134 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 10 | 0 |
| B | 0 | 10 | 0 |
| C | 0 | 10 | 0 |
| D | 0 | 10 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 41774 | 1 |
| B | 0 | 16081 | 2 |
| C | 0 | 21389 | 1 |
| D | 0 | 16082 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6584 | 3700 | 56.196841% |
| B | 6583 | 214 | 3.250798% |
| C | 6584 | 555 | 8.429526% |
| D | 6584 | 170 | 2.582017% |
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 | 7585 | 6584 | 3449 | 3449 | 45.47% | 52.38% |  |
| B | 7584 | 6583 | 136 | 136 | 1.79% | 2.07% |  |
| C | 7585 | 6584 | 509 | 509 | 6.71% | 7.73% |  |
| D | 7585 | 6584 | 156 | 156 | 2.06% | 2.37% |  |
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 | 4132576 | 31943.19 | 512 | 500 | 129.4 |
| A | 8 | 176 | 2972971 | 22978.81 | 512 | 500 | 129.4 |
| A | 12 | 115 | 1834994 | 14181.63 | 512 | 500 | 129.4 |
| B | 5 | 185 | 547372 | 3766.02 | 685 | 662 | 145.2 |
| B | 4 | 206 | 265462 | 1824.08 | 685 | 662 | 145.2 |
| B | 0 | 63 | 68726 | 468.86 | 685 | 662 | 145.2 |
| C | 5 | 250 | 2086579 | 11621.39 | 655 | 648 | 179.5 |
| C | 12 | 252 | 369290 | 2053.82 | 655 | 648 | 179.5 |
| C | 12 | 254 | 256681 | 1426.44 | 655 | 648 | 179.5 |
| D | 2 | 120 | 355584 | 1895.33 | 663 | 633 | 187.3 |
| D | 2 | 249 | 268482 | 1430.23 | 663 | 633 | 187.3 |
| D | 11 | 176 | 130372 | 692.77 | 663 | 633 | 187.3 |
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 |  |