ASTROSAT CZTI

Data Quality Report

Orbit 20190626_T03_123T01_9000003000_level2

Creation date: 2025-12-01T17:52:11.162940
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/AS1T03_123T01_9000003000cztM0_level2.fits modeM0/AS1T03_123T01_9000003000cztM0_level2_quad_clean.evt
Size (bytes)867,571,200647,424,000
Size827.4 MB 617.4 MB
Events in quadrant A5,408,7803,615,183
Events in quadrant B5,218,9303,615,372
Events in quadrant C5,207,4503,371,052
Events in quadrant D4,557,3743,121,376

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01490
B01490
C01490
D01490

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017480
B017480
C017480
D017480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01793150
B01821510
C01796770
D02203760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8579511201.305437%
B8579513671.593333%
C8579515861.848593%
D8579532073.737980%

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 100640 85795 0 0 0.00% 0.00%
B 100640 85793 0 0 0.00% 0.00%
C 100640 85795 0 0 0.00% 0.00%
D 100640 85784 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 5120 11.1 1407 1322 342.2
A 7 110 4399 8.99 1407 1322 342.2
A 0 30 4087 8.08 1407 1322 342.2
B 2 9 4076 10.19 1375 1313 271.1
B 2 8 3443 7.86 1375 1313 271.1
B 5 232 3358 7.54 1375 1313 271.1
C 1 80 3972 7.58 1374 1280 355.3
C 1 81 3897 7.37 1374 1280 355.3
C 12 241 3627 6.61 1374 1280 355.3
D 3 14 3361 6.32 1301 1190 343.5
D 6 67 3249 5.99 1301 1190 343.5
D 10 189 3191 5.83 1301 1190 343.5

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