ASTROSAT CZTI

Data Quality Report

Orbit 20200127_A07_138T02_9000003464_level2

Creation date: 2025-12-09T00:19:32.950822
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/AS1A07_138T02_9000003464cztM0_level2.fits modeM0/AS1A07_138T02_9000003464cztM0_level2_quad_clean.evt
Size (bytes)198,768,960208,402,560
Size189.6 MB 198.7 MB
Events in quadrant A1,216,6801,267,579
Events in quadrant B1,165,7161,278,082
Events in quadrant C1,169,1521,203,649
Events in quadrant D1,027,0941,120,849

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04260
B04260
C04260
D04260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430110
B0441650
C0447040
D0490150

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A209251150.549582%
B209252191.046595%
C209253251.553166%
D209255302.532855%

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 22550 20924 0 0 0.00% 0.00%
B 22550 20921 0 0 0.00% 0.00%
C 22550 20922 0 0 0.00% 0.00%
D 22550 20915 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 1139 10.45 316 296 80.6
A 7 110 950 8.11 316 296 80.6
A 14 79 932 7.89 316 296 80.6
B 2 9 922 10.01 307 293 62.8
B 3 80 782 7.78 307 293 62.8
B 14 254 774 7.65 307 293 62.8
C 12 249 815 6.61 308 288 79.7
C 12 241 811 6.56 308 288 79.7
C 12 250 772 6.07 308 288 79.7
D 3 14 791 6.58 293 266 79.8
D 6 38 756 6.14 293 266 79.8
D 7 3 733 5.85 293 266 79.8

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