ASTROSAT CZTI

Data Quality Report

Orbit 20210805_T04_026T01_9000004624_level2

Creation date: 2025-12-28T06:10:53.229513
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_9000004624cztM0_level2.fits modeM0/AS1T04_026T01_9000004624cztM0_level2_quad_clean.evt
Size (bytes)283,167,360270,028,800
Size270.0 MB 257.5 MB
Events in quadrant A1,325,172926,583
Events in quadrant B1,729,3321,785,361
Events in quadrant C1,785,1041,735,011
Events in quadrant D1,568,9661,570,133

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06380
B06380
C06380
D06380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01494640
B0973950
C0673540
D0895870

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A314271441645.871384%
B3142710663.391988%
C314279503.022878%
D314277462.373755%

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 34752 31073 0 0 0.00% 0.00%
B 34752 31425 0 0 0.00% 0.00%
C 34752 31426 0 0 0.00% 0.00%
D 34752 31400 0 0 0.00% 0.00%

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 29 1064 8.61 344 323 86.1
A 7 110 1043 8.36 344 323 86.1
A 9 19 1034 8.26 344 323 86.1
B 2 9 1428 10.65 456 433 93.4
B 5 232 1216 8.38 456 433 93.4
B 2 8 1190 8.1 456 433 93.4
C 12 241 1248 6.56 472 438 123.4
C 7 111 1225 6.38 472 438 123.4
C 9 209 1184 6.05 472 438 123.4
D 4 246 1210 6.74 447 405 119.5
D 3 159 1139 6.14 447 405 119.5
D 7 3 1109 5.89 447 405 119.5

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