Observation information
- date-obs: 2026-02-22
- time-obs: 02:19:08.181800000
- date-end: 2026-02-22
- time-end: 04:23:49.163800000
- obs_id: A14_049T01_9000006552
- exposure: 2621.95394152
- 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_56287cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56287cztM0_level2_quad_clean.evt
|
| Size (bytes) | 748,523,520 | 81,048,960 |
| Size | 713.8 MB
| 77.3 MB
|
| Events in quadrant A | 13,295,104 | 259,031 |
| Events in quadrant B | 3,801,100 | 663,548 |
| Events in quadrant C | 5,896,121 | 553,908 |
| Events in quadrant D | 4,217,524 | 528,682 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 132 | 0 |
| B | 0 | 132 | 0 |
| C | 0 | 132 | 0 |
| D | 0 | 132 | 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 | 43933 | 1 |
| B | 0 | 15749 | 1 |
| C | 0 | 21960 | 3 |
| D | 0 | 17226 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6426 | 4090 | 63.647681% |
| B | 6426 | 206 | 3.205727% |
| C | 6425 | 639 | 9.945525% |
| D | 6426 | 419 | 6.520386% |
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 | 7481 | 6426 | 4017 | 4017 | 53.70% | 62.51% |  |
| B | 7481 | 6426 | 75 | 75 | 1.00% | 1.17% |  |
| C | 7480 | 6425 | 532 | 532 | 7.11% | 8.28% |  |
| D | 7481 | 6426 | 373 | 373 | 4.99% | 5.80% |  |
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 | 4190351 | 33500.06 | 495 | 482 | 125.1 |
| A | 4 | 95 | 3206662 | 25634.99 | 495 | 482 | 125.1 |
| A | 8 | 176 | 3081876 | 24637.26 | 495 | 482 | 125.1 |
| B | 4 | 206 | 487914 | 3314.25 | 689 | 663 | 147.0 |
| B | 5 | 185 | 314387 | 2133.93 | 689 | 663 | 147.0 |
| B | 8 | 128 | 47476 | 318.42 | 689 | 663 | 147.0 |
| C | 5 | 250 | 2044860 | 11503.66 | 656 | 651 | 177.7 |
| C | 12 | 254 | 676279 | 3802.05 | 656 | 651 | 177.7 |
| C | 12 | 252 | 211372 | 1185.82 | 656 | 651 | 177.7 |
| D | 12 | 31 | 607131 | 3256.27 | 662 | 633 | 186.3 |
| D | 11 | 129 | 346162 | 1855.13 | 662 | 633 | 186.3 |
| D | 2 | 249 | 253262 | 1356.36 | 662 | 633 | 186.3 |
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 |  |