ASTROSAT CZTI

Data Quality Report

Orbit 51774

Creation date: 2025-04-24T17:25:18.302867
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/AS1A13_090T01_9000006464_51774cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51774cztM0_level2_quad_clean.evt
Size (bytes)770,650,560100,863,360
Size734.9 MB 96.2 MB
Events in quadrant A5,737,595673,457
Events in quadrant B5,595,120735,665
Events in quadrant C4,723,581679,607
Events in quadrant D11,873,443429,540

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223112
B0219212
C0191212
D0406062

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77066588.538801%
B77076588.537693%
C77063925.086945%
D7706307039.839086%

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 8056 7706 269 269 3.34% 3.49%
B 8057 7708 245 245 3.04% 3.18%
C 8056 7707 162 162 2.01% 2.10%
D 8056 7707 2412 2412 29.94% 31.30%

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 2 143 583692 2840.15 852 833 205.2
A 12 3 452786 2202.28 852 833 205.2
A 15 174 313350 1522.83 852 833 205.2
B 4 206 1277329 7025.56 843 811 181.7
B 1 239 178419 977.5 843 811 181.7
B 4 174 163744 896.73 843 811 181.7
C 15 218 476626 2103.97 838 835 226.1
C 9 38 246043 1084.32 838 835 226.1
C 12 254 188047 827.86 838 835 226.1
D 11 129 7812077 40212.68 698 675 194.3
D 8 48 702906 3615.05 698 675 194.3
D 0 18 168296 862.9 698 675 194.3

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