Observation information
- date-obs: 2026-06-28
- time-obs: 19:32:14.970300000
- date-end: 2026-06-29
- time-end: 01:19:06.911500000
- obs_id: A14_042T02_9000006586
- exposure: 6843.92117411
- sourceid: NGC4038
- observer: pshalima
- ra_pnt: 180.4708
- dec_pnt: -18.86759
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1A14_042T02_9000006586_58172cztM0_level2.fits
| modeM0/AS1A14_042T02_9000006586_58172cztM0_level2_quad_clean.evt
|
| Size (bytes) | 2,535,526,080 | 217,393,920 |
| Size | 2.4 GB
| 207.3 MB
|
| Events in quadrant A | 8,816,448 | 1,860,093 |
| Events in quadrant B | 39,182,464 | 709,301 |
| Events in quadrant C | 8,994,418 | 1,764,799 |
| Events in quadrant D | 35,346,601 | 890,742 |
Level1 data integrity
| 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 SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 402 | 0 |
| B | 0 | 402 | 0 |
| C | 0 | 402 | 0 |
| D | 0 | 402 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 40749 | 3 |
| B | 0 | 129994 | 3 |
| C | 0 | 41522 | 3 |
| D | 0 | 118620 | 6 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 19666 | 135 | 0.686464% |
| B | 19666 | 13432 | 68.300620% |
| C | 19666 | 83 | 0.422048% |
| D | 19666 | 9484 | 48.225364% |
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 | 20811 | 19668 | 13 | 13 | 0.06% | 0.07% |  |
| B | 20812 | 19669 | 12319 | 12319 | 59.19% | 62.63% |  |
| C | 20811 | 19668 | 39 | 39 | 0.19% | 0.20% |  |
| D | 20812 | 19669 | 10117 | 10117 | 48.61% | 51.44% |  |
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 | 2 | 79 | 144445 | 264.26 | 2183 | 2128 | 538.6 |
| A | 4 | 3 | 61035 | 109.38 | 2183 | 2128 | 538.6 |
| A | 3 | 245 | 44029 | 77.8 | 2183 | 2128 | 538.6 |
| B | 10 | 128 | 33186539 | 125934.18 | 1235 | 1191 | 263.5 |
| B | 2 | 249 | 427047 | 1616.07 | 1235 | 1191 | 263.5 |
| B | 5 | 185 | 206674 | 779.78 | 1235 | 1191 | 263.5 |
| C | 12 | 252 | 233787 | 404.73 | 2106 | 2090 | 572.5 |
| C | 14 | 254 | 126057 | 216.55 | 2106 | 2090 | 572.5 |
| C | 6 | 223 | 118699 | 203.69 | 2106 | 2090 | 572.5 |
| D | 12 | 110 | 25483192 | 50416.94 | 1763 | 1683 | 505.4 |
| D | 8 | 240 | 774705 | 1529.48 | 1763 | 1683 | 505.4 |
| D | 8 | 160 | 735245 | 1451.4 | 1763 | 1683 | 505.4 |
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 |  |