ASTROSAT CZTI

Data Quality Report

Orbit 54831

Creation date: 2025-11-17T11:21:51.494654
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/AS1A14_039T06_9000006526_54831cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54831cztM0_level2_quad_clean.evt
Size (bytes)450,547,200102,720,960
Size429.7 MB 98.0 MB
Events in quadrant A3,217,522675,120
Events in quadrant B3,359,402717,593
Events in quadrant C4,361,648622,611
Events in quadrant D5,173,600589,487

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153732
B0156292
C0184732
D0202602

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7272851.168867%
B72721091.498900%
C72722863.932893%
D72733024.152344%

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 8762 7274 31 31 0.35% 0.43%
B 8762 7274 26 26 0.30% 0.36%
C 8762 7274 260 260 2.97% 3.57%
D 8763 7275 253 253 2.89% 3.48%

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 13 248 98809 524.48 755 737 187.0
A 3 45 52524 276.95 755 737 187.0
A 3 14 46862 246.67 755 737 187.0
B 5 236 272585 1669.3 744 717 162.9
B 5 185 56992 345.54 744 717 162.9
B 10 247 47455 286.98 744 717 162.9
C 12 252 449188 2271.27 719 713 197.5
C 4 5 386368 1953.12 719 713 197.5
C 13 3 308043 1556.45 719 713 197.5
D 11 129 578529 2863.16 711 681 201.8
D 5 38 395498 1956.27 711 681 201.8
D 2 252 246798 1219.48 711 681 201.8

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