ASTROSAT CZTI

Data Quality Report

Orbit 20171025_T01_200T01_9000001638_level2

Creation date: 2025-11-17T23:45:20.345046
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/AS1T01_200T01_9000001638cztM0_level2.fits modeM0/AS1T01_200T01_9000001638cztM0_level2_quad_clean.evt
Size (bytes)1,019,874,2401,487,937,600
Size972.6 MB 1.4 GB
Events in quadrant A5,757,3168,992,151
Events in quadrant B5,963,6729,886,051
Events in quadrant C6,114,2489,686,510
Events in quadrant D5,131,3768,593,773

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023520
B023520
C023520
D023520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03908970
B02717230
C02504160
D03260480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1153961448512.552428%
B11539637043.209817%
C11539621911.898679%
D11539665515.676973%

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 130396 115188 0 0 0.00% 0.00%
B 130396 115392 0 0 0.00% 0.00%
C 130396 115368 0 0 0.00% 0.00%
D 130396 115234 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 5594 11.02 1499 1402 380.5
A 7 110 4879 9.14 1499 1402 380.5
A 9 19 4310 7.64 1499 1402 380.5
B 2 9 5270 12.37 1573 1498 305.0
B 14 254 4067 8.42 1573 1498 305.0
B 3 17 4001 8.21 1573 1498 305.0
C 12 241 4464 7.12 1615 1501 416.3
C 2 191 4224 6.54 1615 1501 416.3
C 1 65 4034 6.08 1615 1501 416.3
D 4 246 4106 7.03 1465 1332 394.4
D 3 14 3937 6.61 1465 1332 394.4
D 6 231 3753 6.14 1465 1332 394.4

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