ASTROSAT CZTI

Data Quality Report

Orbit 21739

Creation date: 2024-06-27T18:31:40.478710
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/AS1A07_005T01_9000003224_21739cztM0_level2.evt modeM0/AS1A07_005T01_9000003224_21739cztM0_level2_quad_clean.evt
Size (bytes)551,445,12083,249,280
Size525.9 MB 79.4 MB
Events in quadrant A3,756,878531,100
Events in quadrant B3,595,703546,339
Events in quadrant C3,345,732514,853
Events in quadrant D5,575,977489,260

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154032
B0147832
C0139412
D0208792

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62941141.811249%
B62931051.668521%
C62931071.700302%
D62936139.740982%

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 7529 6294 29 29 0.39% 0.46%
B 7528 6293 10 10 0.13% 0.16%
C 7528 6294 0 0 0.00% 0.00%
D 7528 6294 391 391 5.19% 6.21%

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 15 236 219492 1273.83 859 845 171.6
A 15 174 217659 1263.15 859 845 171.6
A 13 254 10755 57.74 859 845 171.6
B 3 64 138412 852.87 864 845 161.3
B 0 230 18264 107.99 864 845 161.3
B 12 111 17479 103.13 864 845 161.3
C 14 238 131231 680.75 823 830 191.6
C 13 61 5656 25.19 823 830 191.6
C 10 22 3773 15.36 823 830 191.6
D 12 235 783749 3997.56 808 789 195.9
D 2 136 652520 3327.54 808 789 195.9
D 7 238 327028 1665.68 808 789 195.9

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