ASTROSAT CZTI

Data Quality Report

Orbit 20180815_A04_037T02_9000002310_level2

Creation date: 2025-11-24T02:53:16.736083
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_037T02_9000002310cztM0_level2.fits modeM0/AS1A04_037T02_9000002310cztM0_level2_quad_clean.evt
Size (bytes)669,337,920514,391,040
Size638.3 MB 490.6 MB
Events in quadrant A4,102,6622,838,604
Events in quadrant B3,952,2442,871,411
Events in quadrant C4,035,3022,717,258
Events in quadrant D3,524,8282,493,858

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013840
B013840
C013840
D013840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01551990
B01441640
C01427010
D01637830

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6788315472.278921%
B6788310411.533521%
C6788310811.592446%
D6788318952.791568%

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 79263 67874 0 0 0.00% 0.00%
B 79263 67871 0 0 0.00% 0.00%
C 79263 67873 0 0 0.00% 0.00%
D 79263 67856 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 3804 10.73 1068 1000 261.3
A 7 110 3263 8.66 1068 1000 261.3
A 9 19 3002 7.66 1068 1000 261.3
B 2 9 3253 10.9 1044 995 207.1
B 2 8 2708 8.27 1044 995 207.1
B 3 17 2655 8.02 1044 995 207.1
C 1 81 3099 7.73 1063 992 272.6
C 1 80 3078 7.65 1063 992 272.6
C 12 241 2802 6.64 1063 992 272.6
D 6 231 2539 6.08 1007 918 266.5
D 3 14 2510 5.97 1007 918 266.5
D 6 38 2426 5.66 1007 918 266.5

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