ASTROSAT CZTI

Data Quality Report

Orbit 52976

Creation date: 2025-07-15T13:52:41.503682
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/AS1A13_003T01_9000006486_52976cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52976cztM0_level2_quad_clean.evt
Size (bytes)1,417,415,040122,457,600
Size1.3 GB 116.8 MB
Events in quadrant A25,056,30792,371
Events in quadrant B5,254,3361,113,450
Events in quadrant C10,791,305896,096
Events in quadrant D10,553,448871,683

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0815120
B0231740
C0394520
D0386250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02160
B02160
C02160
D02160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1050210502100.000000%
B105021731.647305%
C10502178516.996763%
D10502135812.930870%

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 12742 10504 9805 9805 76.95% 93.35%
B 12742 10504 36 36 0.28% 0.34%
C 12742 10504 1734 1734 13.61% 16.51%
D 12742 10504 1354 1354 10.63% 12.89%

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 9 191 24347876 728219.41 128 124 33.4
A 0 8 83634 2497.71 128 124 33.4
A 15 174 57405 1713.22 128 124 33.4
B 0 143 236277 984.47 1127 1086 238.9
B 10 128 170925 710.92 1127 1086 238.9
B 10 247 77910 321.57 1127 1086 238.9
C 12 254 1957772 7060.04 1011 1002 277.2
C 15 215 1801160 6494.98 1011 1002 277.2
C 7 80 853357 3075.3 1011 1002 277.2
D 8 176 2317020 7907.02 1042 997 292.9
D 2 62 1636622 5584.11 1042 997 292.9
D 15 78 484378 1650.29 1042 997 292.9

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