ASTROSAT CZTI

Data Quality Report

Orbit 20180824_A04_198T01_9000002322_level2

Creation date: 2025-11-24T05:02:45.629290
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/AS1A04_198T01_9000002322cztM0_level2.fits modeM0/AS1A04_198T01_9000002322cztM0_level2_quad_clean.evt
Size (bytes)998,248,320916,810,560
Size952.0 MB 874.3 MB
Events in quadrant A6,028,8625,335,119
Events in quadrant B5,829,3605,393,707
Events in quadrant C6,025,6245,175,221
Events in quadrant D5,237,7084,752,188

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02245500
B02193910
C02288440
D02419110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021160
B021160
C021160
D021160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01820
B01820
C01820
D01820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10372325612.469076%
B10372316481.588847%
C10372319731.902182%
D10372327592.659969%

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 121968 103718 0 0 0.00% 0.00%
B 121968 103723 0 0 0.00% 0.00%
C 121968 103721 0 0 0.00% 0.00%
D 121968 103705 0 0 0.00% 0.00%

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 29 5731 11.09 1567 1470 384.1
A 7 110 4760 8.57 1567 1470 384.1
A 15 236 4572 8.08 1567 1470 384.1
B 2 9 4723 10.7 1543 1467 304.4
B 2 8 3942 8.13 1543 1467 304.4
B 5 128 3888 7.95 1543 1467 304.4
C 1 81 4572 7.61 1591 1491 404.9
C 1 80 4562 7.58 1591 1491 404.9
C 12 241 4247 6.81 1591 1491 404.9
D 6 231 3852 6.3 1495 1364 394.9
D 3 14 3850 6.3 1495 1364 394.9
D 6 67 3566 5.58 1495 1364 394.9

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