ASTROSAT CZTI

Data Quality Report

Orbit 23845

Creation date: 2024-06-27T18:59:19.266258
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_027T03_9000003528_23845cztM0_level2.evt modeM0/AS1A07_027T03_9000003528_23845cztM0_level2_quad_clean.evt
Size (bytes)1,332,547,200230,247,360
Size1.2 GB 219.6 MB
Events in quadrant A7,963,5671,478,976
Events in quadrant B8,169,7101,503,573
Events in quadrant C8,825,1801,438,846
Events in quadrant D14,244,6421,374,131

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03460
B03460
C03460
D03460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0349073
B0351413
C0369013
D0540463

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A170811510.884023%
B170812041.194309%
C170824432.593373%
D170827804.566210%

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 17826 17085 0 0 0.00% 0.00%
B 17826 17085 3 3 0.02% 0.02%
C 17827 17086 168 168 0.94% 0.98%
D 17827 17086 538 538 3.02% 3.15%

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 13 254 28824 64.91 2061 2017 413.0
A 3 137 18175 39.13 2061 2017 413.0
A 0 226 17808 38.24 2061 2017 413.0
B 12 111 47291 116.11 2058 2005 390.0
B 11 111 41405 101.02 2058 2005 390.0
B 14 111 35500 85.88 2058 2005 390.0
C 0 207 572089 1243.09 1967 1976 458.6
C 14 238 312320 676.68 1967 1976 458.6
C 0 239 114985 246.41 1967 1976 458.6
D 8 195 4731483 9872.57 1975 1915 479.1
D 1 52 1615901 3369.06 1975 1915 479.1
D 12 233 133294 274.24 1975 1915 479.1

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