ASTROSAT CZTI

Data Quality Report

Orbit 20210815_T04_037T01_9000004644_level2

Creation date: 2021-08-16T17:39:19.115434
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_037T01_9000004644cztM0_level2_bc.evt modeM0/AS1T04_037T01_9000004644cztM0_level2_quad_clean.evt
Size (bytes)1,229,716,800247,299,840
Size1.1 GB 235.8 MB
Events in quadrant A9,168,4881,522,329
Events in quadrant B12,445,6401,551,228
Events in quadrant C5,191,5681,530,401
Events in quadrant D9,024,6591,458,927

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0624480
B0712400
C0468990
D0581860

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04200
B04200
C04200
D04200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20705221910.717218%
B2070513696.611929%
C207058153.936247%
D207059604.636561%

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 22040 20704 157 157 0.71% 0.76%
B 22040 20704 69 69 0.31% 0.33%
C 22040 20703 5 5 0.02% 0.02%
D 22040 20704 58 58 0.26% 0.28%

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 13 5184032 22902.49 1023 1004 226.3
A 13 254 36206 155.55 1023 1004 226.3
A 13 6 27168 115.61 1023 1004 226.3
B 6 159 5438136 26447.15 1055 1026 205.6
B 10 245 1370232 6660.08 1055 1026 205.6
B 4 80 1187141 5769.49 1055 1026 205.6
C 0 10 995408 4110.54 1022 1020 241.9
C 14 254 93230 381.17 1022 1020 241.9
C 3 233 93223 381.14 1022 1020 241.9
D 8 195 2735266 11378.2 1035 1000 240.3
D 12 218 1599501 6651.9 1035 1000 240.3
D 12 227 205774 852.13 1035 1000 240.3

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