ASTROSAT CZTI

Data Quality Report

Orbit 20210224_A10_115T01_9000004206_level2

Creation date: 2025-12-20T19:55:12.929805
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/AS1A10_115T01_9000004206cztM0_level2.fits modeM0/AS1A10_115T01_9000004206cztM0_level2_quad_clean.evt
Size (bytes)264,882,240191,030,400
Size252.6 MB 182.2 MB
Events in quadrant A1,826,4441,313,383
Events in quadrant B1,709,3261,291,321
Events in quadrant C1,214,144312,133
Events in quadrant D1,462,8181,066,680

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05360
B05360
C05360
D05360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0570
B0570
C0570
D0570

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0566620
B0674820
C01702710
D0878230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A261583941.506231%
B261589273.543849%
C261581794468.598517%
D26158266910.203379%

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 31923 26158 0 0 0.00% 0.00%
B 31923 26156 0 0 0.00% 0.00%
C 31923 26154 0 0 0.00% 0.00%
D 31923 25966 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 1498 8.99 476 449 116.7
A 7 110 1430 8.41 476 449 116.7
A 9 19 1317 7.44 476 449 116.7
B 2 9 1310 9.68 453 435 90.4
B 5 225 1130 7.68 453 435 90.4
B 5 128 1096 7.31 453 435 90.4
C 3 202 1004 8.54 320 303 82.1
C 3 203 908 7.37 320 303 82.1
C 1 81 901 7.28 320 303 82.1
D 15 46 1056 6.14 418 385 109.2
D 10 189 1034 5.94 418 385 109.2
D 3 14 1015 5.77 418 385 109.2

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