ASTROSAT CZTI

Data Quality Report

Orbit 55251

Creation date: 2025-12-14T21:20:05.730521
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/AS1A14_009T01_9000006534_55251cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55251cztM0_level2_quad_clean.evt
Size (bytes)1,298,419,200274,265,280
Size1.2 GB 261.6 MB
Events in quadrant A9,237,7101,782,980
Events in quadrant B10,038,8521,861,415
Events in quadrant C13,131,2601,683,180
Events in quadrant D14,115,7451,606,984

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04000
B04000
C04000
D04000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0429042
B0454292
C0528432
D0546563

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A198824792.409214%
B1988310875.466982%
C198839424.737716%
D198827253.646514%

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 20792 19884 120 120 0.58% 0.60%
B 20793 19885 498 498 2.40% 2.50%
C 20793 19885 714 714 3.43% 3.59%
D 20792 19884 472 472 2.27% 2.37%

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 8 384360 753.0 2095 2041 507.7
A 3 62 282170 551.73 2095 2041 507.7
A 12 115 118899 230.16 2095 2041 507.7
B 5 185 1486708 3422.66 2034 1956 433.8
B 2 249 260277 595.48 2034 1956 433.8
B 10 247 118746 269.23 2034 1956 433.8
C 1 16 1630540 2943.24 2025 2004 553.3
C 13 3 1199977 2165.09 2025 2004 553.3
C 15 147 706449 1273.14 2025 2004 553.3
D 5 38 2281456 4017.71 2031 1947 567.4
D 2 249 1083816 1906.83 2031 1947 567.4
D 8 160 812477 1428.58 2031 1947 567.4

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