ASTROSAT CZTI

Data Quality Report

Orbit 20220107_T04_074T01_9000004852_level2

Creation date: 2022-01-10T12:00:56.401828
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_074T01_9000004852cztM0_level2_bc.evt modeM0/AS1T04_074T01_9000004852cztM0_level2_quad_clean.evt
Size (bytes)1,259,890,560259,686,720
Size1.2 GB 247.7 MB
Events in quadrant A5,730,5441,601,184
Events in quadrant B7,513,1741,585,038
Events in quadrant C7,195,8011,583,805
Events in quadrant D16,057,9821,420,677

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04960
B04960
C04960
D04960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0780
B0780
C0780
D0780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0537480
B0598630
C0542900
D0885210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A243254671.919836%
B243257953.268243%
C243251960.805755%
D24325255710.511819%

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 32059 24329 14 14 0.04% 0.06%
B 32059 24325 31 31 0.10% 0.13%
C 32059 24325 24 24 0.07% 0.10%
D 32059 24325 833 833 2.60% 3.42%

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 15 169 837049 3035.89 1247 1224 275.3
A 13 254 40334 142.06 1247 1224 275.3
A 10 83 37999 133.57 1247 1224 275.3
B 5 172 1882771 7554.59 1254 1223 249.1
B 0 219 220286 879.56 1254 1223 249.1
B 4 232 118578 471.19 1254 1223 249.1
C 15 214 992387 3526.35 1233 1225 281.1
C 3 233 644605 2289.01 1233 1225 281.1
C 0 10 503489 1786.95 1233 1225 281.1
D 8 195 4520438 16024.42 1184 1147 282.0
D 8 230 2051733 7270.93 1184 1147 282.0
D 7 238 1832223 6492.6 1184 1147 282.0

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