Observation information
- date-obs: 2026-02-21
- time-obs: 00:02:45.392700000
- date-end: 2026-02-21
- time-end: 02:23:02.372300000
- obs_id: A14_049T01_9000006552
- exposure: 3386.81817591
- 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_56270cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56270cztM0_level2_quad_clean.evt
|
| Size (bytes) | 814,613,760 | 83,327,040 |
| Size | 776.9 MB
| 79.5 MB
|
| Events in quadrant A | 13,785,465 | 314,304 |
| Events in quadrant B | 4,216,383 | 664,252 |
| Events in quadrant C | 4,865,959 | 573,062 |
| Events in quadrant D | 6,763,545 | 499,662 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 140 | 0 |
| B | 0 | 140 | 0 |
| C | 0 | 140 | 0 |
| D | 0 | 140 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 16 | 0 |
| B | 0 | 17 | 0 |
| C | 0 | 17 | 0 |
| D | 0 | 17 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 45538 | 2 |
| B | 0 | 17213 | 2 |
| C | 0 | 19147 | 2 |
| D | 0 | 24741 | 5 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6760 | 3742 | 55.355030% |
| B | 6760 | 339 | 5.014793% |
| C | 6760 | 466 | 6.893491% |
| D | 6759 | 962 | 14.232875% |
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 | 7715 | 6760 | 3744 | 3744 | 48.53% | 55.38% |  |
| B | 7715 | 6761 | 189 | 189 | 2.45% | 2.80% |  |
| C | 7715 | 6760 | 376 | 376 | 4.87% | 5.56% |  |
| D | 7714 | 6760 | 887 | 887 | 11.50% | 13.12% |  |
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 | 3917680 | 29314.38 | 534 | 522 | 133.6 |
| A | 4 | 95 | 3155924 | 23613.72 | 534 | 522 | 133.6 |
| A | 8 | 176 | 2934653 | 21957.82 | 534 | 522 | 133.6 |
| B | 5 | 185 | 654549 | 4283.78 | 709 | 681 | 152.6 |
| B | 1 | 255 | 313653 | 2050.42 | 709 | 681 | 152.6 |
| B | 4 | 171 | 121803 | 793.52 | 709 | 681 | 152.6 |
| C | 12 | 254 | 1151460 | 6167.3 | 683 | 676 | 186.6 |
| C | 15 | 230 | 732303 | 3920.94 | 683 | 676 | 186.6 |
| C | 12 | 252 | 98593 | 524.76 | 683 | 676 | 186.6 |
| D | 8 | 129 | 1858091 | 9891.82 | 662 | 633 | 187.8 |
| D | 2 | 249 | 1143506 | 6086.32 | 662 | 633 | 187.8 |
| D | 2 | 207 | 550740 | 2929.57 | 662 | 633 | 187.8 |
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 |  |