Observation information
- date-obs: 2026-02-25
- time-obs: 08:19:54.547000000
- date-end: 2026-02-25
- time-end: 10:24:20.536500000
- obs_id: A14_049T01_9000006552
- exposure: 402.297673762
- 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_56335cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56335cztM0_level2_quad_clean.evt
|
| Size (bytes) | 802,745,280 | 78,071,040 |
| Size | 765.6 MB
| 74.5 MB
|
| Events in quadrant A | 5,937,404 | 575,082 |
| Events in quadrant B | 3,917,086 | 671,076 |
| Events in quadrant C | 3,878,791 | 609,287 |
| Events in quadrant D | 15,454,963 | 37,021 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 136 | 0 |
| B | 0 | 136 | 0 |
| C | 0 | 136 | 0 |
| D | 0 | 136 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 8 | 0 |
| B | 0 | 8 | 0 |
| C | 0 | 8 | 0 |
| D | 0 | 8 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 22257 | 1 |
| B | 0 | 16428 | 1 |
| C | 0 | 16457 | 1 |
| D | 0 | 50664 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6771 | 844 | 12.464924% |
| B | 6771 | 314 | 4.637424% |
| C | 6772 | 248 | 3.662138% |
| D | 6772 | 6431 | 94.964560% |
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 | 7466 | 6773 | 602 | 602 | 8.06% | 8.89% |  |
| B | 7466 | 6772 | 95 | 95 | 1.27% | 1.40% |  |
| C | 7467 | 6774 | 108 | 108 | 1.45% | 1.59% |  |
| D | 7467 | 6773 | 5044 | 5044 | 67.55% | 74.47% |  |
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 | 4 | 95 | 1579472 | 9059.44 | 709 | 692 | 174.3 |
| A | 0 | 8 | 743560 | 4262.76 | 709 | 692 | 174.3 |
| A | 15 | 33 | 306431 | 1754.41 | 709 | 692 | 174.3 |
| B | 5 | 185 | 411970 | 2666.05 | 718 | 689 | 154.3 |
| B | 1 | 255 | 136588 | 880.94 | 718 | 689 | 154.3 |
| B | 5 | 172 | 125642 | 809.99 | 718 | 689 | 154.3 |
| C | 5 | 250 | 479494 | 2468.2 | 708 | 701 | 194.0 |
| C | 12 | 252 | 221625 | 1138.88 | 708 | 701 | 194.0 |
| C | 12 | 254 | 115868 | 593.69 | 708 | 701 | 194.0 |
| D | 8 | 129 | 13518356 | 215745.74 | 215 | 204 | 62.7 |
| D | 2 | 249 | 380764 | 6073.63 | 215 | 204 | 62.7 |
| D | 2 | 62 | 303771 | 4844.84 | 215 | 204 | 62.7 |
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 |  |