ASTROSAT CZTI

Data Quality Report

Orbit 20181021_T03_020T01_9000002444_level2

Creation date: 2025-11-25T07:35:26.256510
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_020T01_9000002444cztM0_level2.fits modeM0/AS1T03_020T01_9000002444cztM0_level2_quad_clean.evt
Size (bytes)471,640,320518,713,920
Size449.8 MB 494.7 MB
Events in quadrant A2,933,9943,302,173
Events in quadrant B2,854,6683,384,956
Events in quadrant C2,807,7783,065,447
Events in quadrant D2,147,9662,423,886

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010440
B010440
C010440
D010440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01135810
B01153390
C01654750
D01290400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5149811132.161249%
B514987971.547633%
C5149834996.794439%
D514981043020.253214%

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 71310 51500 0 0 0.00% 0.00%
B 71310 51499 0 0 0.00% 0.00%
C 71310 51499 0 0 0.00% 0.00%
D 71310 48956 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 2815 11.07 763 718 189.4
A 7 110 2330 8.51 763 718 189.4
A 9 19 2230 7.98 763 718 189.4
B 2 9 2316 10.92 755 722 146.0
B 2 8 1949 8.4 755 722 146.0
B 14 254 1884 7.96 755 722 146.0
C 12 241 2008 6.87 741 690 192.0
C 2 191 1921 6.41 741 690 192.0
C 7 111 1892 6.26 741 690 192.0
D 3 14 1631 6.51 611 553 165.5
D 6 231 1558 6.07 611 553 165.5
D 10 189 1534 5.93 611 553 165.5

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