ASTROSAT CZTI

Data Quality Report

Orbit 57271

Creation date: 2026-04-29T18:03:45.666075
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_049T03_9000006570_57271cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57271cztM0_level2_quad_clean.evt
Size (bytes)1,281,404,160217,310,400
Size1.2 GB 207.2 MB
Events in quadrant A12,174,2251,352,890
Events in quadrant B8,992,7101,430,168
Events in quadrant C15,111,8761,275,940
Events in quadrant D9,709,5561,233,384

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0488293
B0404152
C0580112
D0424533

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A186669755.223401%
B186665562.978678%
C1866716228.689131%
D186664702.517947%

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 19962 18717 565 565 2.83% 3.02%
B 19962 18717 88 88 0.44% 0.47%
C 19963 18718 1180 1180 5.91% 6.30%
D 19963 18718 225 225 1.13% 1.20%

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 10 251 3204478 6560.23 1985 1934 488.2
A 8 4 825688 1687.41 1985 1934 488.2
A 3 95 241900 491.56 1985 1934 488.2
B 10 16 477196 1131.8 1960 1889 420.0
B 5 185 197731 466.34 1960 1889 420.0
B 0 199 112087 262.4 1960 1889 420.0
C 15 224 6611974 12912.45 1893 1872 511.9
C 14 254 299055 580.53 1893 1872 511.9
C 14 67 252299 489.19 1893 1872 511.9
D 2 249 624205 1159.25 1936 1852 536.9
D 8 160 296449 548.74 1936 1852 536.9
D 8 240 248080 458.65 1936 1852 536.9

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