ASTROSAT CZTI

Data Quality Report

Orbit 20200525_A07_027T01_9000003690_level2

Creation date: 2021-08-31T04:10:56.114576
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_027T01_9000003690cztM0_level2_bc.evt modeM0/AS1A07_027T01_9000003690cztM0_level2_quad_clean.evt
Size (bytes)4,332,528,0001,592,352,000
Size4.0 GB 1.5 GB
Events in quadrant A25,280,29010,332,087
Events in quadrant B28,094,89210,405,900
Events in quadrant C28,438,8609,872,320
Events in quadrant D41,541,2019,713,707

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01950
B01950
C01950
D01950

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02402120
B02508980
C02540040
D02902210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023500
B023500
C023500
D023500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11542810370.898396%
B11542817621.526493%
C11542819541.692830%
D11542825672.223897%

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 134828 115432 0 0 0.00% 0.00%
B 134828 115432 30 30 0.02% 0.03%
C 134828 115431 38 38 0.03% 0.03%
D 134827 115428 458 458 0.34% 0.40%

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 13 254 171039 118.05 6508 6418 1394.5
A 13 170 136086 92.98 6508 6418 1394.5
A 0 226 41930 25.47 6508 6418 1394.5
B 5 235 1366461 1131.3 6491 6352 1202.3
B 3 64 1097670 907.72 6491 6352 1202.3
B 0 190 275320 223.72 6491 6352 1202.3
C 7 247 3943416 2736.98 6158 6156 1438.5
C 0 239 316708 215.88 6158 6156 1438.5
C 8 208 263730 179.05 6158 6156 1438.5
D 8 195 7229399 4940.53 6326 6126 1462.0
D 12 235 3103992 2118.86 6326 6126 1462.0
D 12 233 1932422 1317.53 6326 6126 1462.0

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