Observation information
- date-obs: 2026-02-21
- time-obs: 10:40:49.305600000
- date-end: 2026-02-21
- time-end: 12:45:29.289400000
- obs_id: A14_049T01_9000006552
- exposure: 2902.11880952
- 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_56277cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56277cztM0_level2_quad_clean.evt
|
| Size (bytes) | 761,616,000 | 86,549,760 |
| Size | 726.3 MB
| 82.5 MB
|
| Events in quadrant A | 14,138,010 | 286,359 |
| Events in quadrant B | 3,783,610 | 680,809 |
| Events in quadrant C | 4,996,491 | 597,875 |
| Events in quadrant D | 4,745,212 | 579,589 |
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 | 7 | 0 |
| B | 0 | 7 | 0 |
| C | 0 | 7 | 0 |
| D | 0 | 7 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 46644 | 1 |
| B | 0 | 16096 | 1 |
| C | 0 | 19627 | 1 |
| D | 0 | 18884 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6830 | 4086 | 59.824305% |
| B | 6830 | 272 | 3.982430% |
| C | 6831 | 548 | 8.022252% |
| D | 6831 | 214 | 3.132777% |
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 | 7479 | 6829 | 3733 | 3733 | 49.91% | 54.66% |  |
| B | 7480 | 6830 | 68 | 68 | 0.91% | 1.00% |  |
| C | 7481 | 6832 | 420 | 420 | 5.61% | 6.15% |  |
| D | 7481 | 6831 | 176 | 176 | 2.35% | 2.58% |  |
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 | 8 | 176 | 3638694 | 28586.42 | 507 | 494 | 127.3 |
| A | 12 | 115 | 3488132 | 27403.41 | 507 | 494 | 127.3 |
| A | 15 | 32 | 2016751 | 15842.33 | 507 | 494 | 127.3 |
| B | 5 | 185 | 444944 | 2867.23 | 723 | 698 | 154.9 |
| B | 10 | 247 | 81466 | 521.29 | 723 | 698 | 154.9 |
| B | 1 | 207 | 76440 | 488.85 | 723 | 698 | 154.9 |
| C | 12 | 254 | 1377811 | 7255.65 | 697 | 692 | 189.8 |
| C | 15 | 230 | 376275 | 1978.84 | 697 | 692 | 189.8 |
| C | 13 | 3 | 217763 | 1143.68 | 697 | 692 | 189.8 |
| D | 7 | 77 | 793218 | 3876.42 | 717 | 684 | 204.4 |
| D | 5 | 32 | 269253 | 1313.62 | 717 | 684 | 204.4 |
| D | 2 | 249 | 173182 | 843.72 | 717 | 684 | 204.4 |
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 |  |