ASTROSAT CZTI

Data Quality Report

Orbit 20210722_T04_029T01_9000004582_level2

Creation date: 2025-12-27T21:23:46.377434
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/AS1T04_029T01_9000004582cztM0_level2.fits modeM0/AS1T04_029T01_9000004582cztM0_level2_quad_clean.evt
Size (bytes)1,354,037,760970,718,400
Size1.3 GB 925.7 MB
Events in quadrant A8,568,4125,400,900
Events in quadrant B7,887,9305,049,828
Events in quadrant C8,092,6325,065,770
Events in quadrant D7,230,2644,653,732

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027260
B027300
C027420
D027400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02210
B02210
C02210
D02210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02798950
B04313110
C03112920
D03186720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13475418471.370646%
B13434270195.224725%
C13472052173.872476%
D13469924281.802538%

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 161551 135352 0 0 0.00% 0.00%
B 161551 134834 0 0 0.00% 0.00%
C 161551 135323 0 0 0.00% 0.00%
D 161551 135262 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 8390 11.63 2229 2094 541.5
A 7 110 6767 8.63 2229 2094 541.5
A 0 30 6581 8.29 2229 2094 541.5
B 2 9 6266 10.41 2084 1992 410.7
B 2 8 5292 8.04 2084 1992 410.7
B 3 80 5200 7.81 2084 1992 410.7
C 1 80 6134 7.58 2142 2002 545.1
C 1 81 6129 7.57 2142 2002 545.1
C 12 241 5628 6.65 2142 2002 545.1
D 3 14 5153 6.09 2063 1882 537.5
D 7 3 5087 5.96 2063 1882 537.5
D 6 231 5081 5.95 2063 1882 537.5

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