ASTROSAT CZTI

Data Quality Report

Orbit 20210805_T04_026T01_9000004624_level2

Creation date: 2021-08-09T11:26:52.250887
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_bc.evt modeM0/AS1T04_026T01_9000004624cztM0_level2_quad_clean.evt
Size (bytes)1,979,481,600396,959,040
Size1.8 GB 378.6 MB
Events in quadrant A21,363,4341,959,946
Events in quadrant B15,458,7992,694,331
Events in quadrant C6,934,4522,651,281
Events in quadrant D14,047,6732,553,378

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 31427 188 188 0.54% 0.60%
B 34752 31429 7 7 0.02% 0.02%
C 34752 31427 7 7 0.02% 0.02%
D 34752 31428 28 28 0.08% 0.09%

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 16118310 61759.63 1197 1173 261.0
A 15 174 581627 2224.26 1197 1173 261.0
A 13 254 40175 149.45 1197 1173 261.0
B 6 159 7982901 25440.77 1624 1580 313.7
B 10 245 1009931 3214.16 1624 1580 313.7
B 0 190 175258 553.61 1624 1580 313.7
C 0 10 617903 1608.69 1574 1561 383.1
C 10 22 89780 230.26 1574 1561 383.1
C 2 114 58681 149.09 1574 1561 383.1
D 8 195 6834894 18566.62 1591 1534 368.0
D 11 176 636572 1725.43 1591 1534 368.0
D 2 250 197176 531.57 1591 1534 368.0

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