ASTROSAT CZTI

Data Quality Report

Orbit 20180709_A04_218T03_9000002214_level2

Creation date: 2025-11-23T09:40:27.886986
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/AS1A04_218T03_9000002214cztM0_level2.fits modeM0/AS1A04_218T03_9000002214cztM0_level2_quad_clean.evt
Size (bytes)295,830,720275,376,960
Size282.1 MB 262.6 MB
Events in quadrant A1,793,4381,612,880
Events in quadrant B1,701,5341,614,470
Events in quadrant C1,771,2681,534,395
Events in quadrant D1,544,3621,428,875

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06400
B06400
C06400
D06400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0691180
B0741640
C0685330
D0669190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A312562690.860635%
B3125612303.935244%
C312561850.591886%
D312562730.873432%

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 36242 31255 0 0 0.00% 0.00%
B 36242 31243 0 0 0.00% 0.00%
C 36242 31253 0 0 0.00% 0.00%
D 36242 31253 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 1820 11.63 466 434 119.2
A 7 110 1458 8.59 466 434 119.2
A 0 30 1433 8.38 466 434 119.2
B 2 9 1436 11.15 448 427 90.5
B 5 128 1149 7.98 448 427 90.5
B 3 17 1134 7.81 448 427 90.5
C 1 80 1344 7.48 466 433 121.7
C 1 81 1330 7.37 466 433 121.7
C 9 233 1244 6.66 466 433 121.7
D 6 231 1164 6.42 440 400 119.0
D 7 3 1140 6.22 440 400 119.0
D 3 14 1120 6.05 440 400 119.0

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