ASTROSAT CZTI

Data Quality Report

Orbit 20210720_T04_026T01_9000004560_level2

Creation date: 2021-07-21T17:15:47.725956
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_026T01_9000004560cztM0_level2_bc.evt modeM0/AS1T04_026T01_9000004560cztM0_level2_quad_clean.evt
Size (bytes)950,656,320273,928,320
Size906.6 MB 261.2 MB
Events in quadrant A4,292,6751,752,074
Events in quadrant B9,970,3591,751,527
Events in quadrant C5,264,0151,688,268
Events in quadrant D7,813,4381,643,649

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04300
B04300
C04300
D04300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0440570
B0644980
C0486290
D0543300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A212276212.925519%
B212289334.395138%
C2122810925.144149%
D212289434.442246%

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 22412 21225 0 0 0.00% 0.00%
B 22413 21228 0 0 0.00% 0.00%
C 22413 21226 36 36 0.16% 0.17%
D 22413 21226 163 163 0.73% 0.77%

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 31387 125.41 1111 1092 241.6
A 12 194 7138 25.03 1111 1092 241.6
A 0 226 6889 24.0 1111 1092 241.6
B 6 159 5552084 25792.19 1111 1081 215.2
B 0 190 75319 344.94 1111 1081 215.2
B 4 80 36738 165.68 1111 1081 215.2
C 3 233 761150 2949.04 1067 1056 257.7
C 10 22 327453 1266.37 1067 1056 257.7
C 2 114 38983 147.15 1067 1056 257.7
D 8 195 2247352 8842.24 1091 1051 254.0
D 12 218 1153325 4535.76 1091 1051 254.0
D 2 250 150713 589.12 1091 1051 254.0

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