ASTROSAT CZTI

Data Quality Report

Orbit 21254

Creation date: 2024-06-27T18:25:30.593056
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/AS1A05_037T01_9000003140_21254cztM0_level2.evt modeM0/AS1A05_037T01_9000003140_21254cztM0_level2_quad_clean.evt
Size (bytes)640,399,680115,390,080
Size610.7 MB 110.0 MB
Events in quadrant A4,309,694728,864
Events in quadrant B4,434,700743,531
Events in quadrant C4,199,745724,971
Events in quadrant D5,863,611695,988

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182602
B0188252
C0180672
D0232804

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A86561011.166821%
B86561661.917745%
C86561491.721349%
D86552322.680531%

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 9167 8657 11 11 0.12% 0.13%
B 9167 8659 19 19 0.21% 0.22%
C 9167 8659 8 8 0.09% 0.09%
D 9166 8657 103 103 1.12% 1.19%

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 102088 467.0 1064 1041 216.4
A 5 16 71094 323.76 1064 1041 216.4
A 13 254 13847 59.18 1064 1041 216.4
B 0 245 159060 769.46 1063 1034 205.4
B 3 64 30722 144.56 1063 1034 205.4
B 12 111 24511 114.31 1063 1034 205.4
C 14 238 157664 652.14 1021 1028 240.2
C 0 207 49807 203.09 1021 1028 240.2
C 13 61 7231 25.83 1021 1028 240.2
D 13 174 1003976 3994.37 1024 993 251.1
D 1 20 167957 664.93 1024 993 251.1
D 12 235 159292 630.42 1024 993 251.1

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