ASTROSAT CZTI

Data Quality Report

Orbit 26658

Creation date: 2024-06-27T19:31:28.827211
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A09_145T01_9000003848_26658cztM0_level2.evt modeM0/AS1A09_145T01_9000003848_26658cztM0_level2_quad_clean.evt
Size (bytes)1,682,418,240321,808,320
Size1.6 GB 306.9 MB
Events in quadrant A10,830,9942,109,924
Events in quadrant B12,373,3222,118,892
Events in quadrant C11,384,6682,041,307
Events in quadrant D14,857,3951,941,678

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0461620
B0509090
C0477110
D0592110

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A223091200.537900%
B223095042.259178%
C223093411.528531%
D223099274.155274%

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 25569 22313 6 6 0.02% 0.03%
B 25569 22313 253 253 0.99% 1.13%
C 25569 22313 45 45 0.18% 0.20%
D 25569 22313 750 750 2.93% 3.36%

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 0 13 104861 183.88 2763 2715 555.5
A 12 96 48522 82.46 2763 2715 555.5
A 13 254 35828 59.61 2763 2715 555.5
B 10 245 1347794 2600.02 2737 2677 517.3
B 15 33 81279 151.93 2737 2677 517.3
B 3 112 79538 148.57 2737 2677 517.3
C 15 208 442261 713.31 2637 2665 616.3
C 14 238 425351 685.87 2637 2665 616.3
C 2 16 114864 182.06 2637 2665 616.3
D 7 80 2763498 4262.36 2639 2571 647.7
D 1 52 850442 1308.96 2639 2571 647.7
D 2 250 634519 975.61 2639 2571 647.7

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