ASTROSAT CZTI

Data Quality Report

Orbit 57736

Creation date: 2026-05-31T01:01:01.667659
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_083T16_9000006580_57736cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57736cztM0_level2_quad_clean.evt
Size (bytes)1,397,465,280262,647,360
Size1.3 GB 250.5 MB
Events in quadrant A9,374,0761,755,994
Events in quadrant B10,017,6661,852,352
Events in quadrant C19,814,7201,460,929
Events in quadrant D11,053,1721,573,451

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03840
B03840
C03840
D03840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0411962
B0433782
C0721322
D0460502

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A189963301.737208%
B189975923.116282%
C18997333617.560667%
D189975823.063642%

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 20006 18996 115 115 0.57% 0.61%
B 20007 18997 221 221 1.10% 1.16%
C 20007 18997 3050 3050 15.24% 16.06%
D 20007 18998 430 430 2.15% 2.26%

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 3 128 701004 1377.96 2050 1996 507.3
A 0 12 408288 800.93 2050 1996 507.3
A 12 3 159178 309.85 2050 1996 507.3
B 4 142 491146 1142.35 2009 1930 428.3
B 4 80 304062 705.5 2009 1930 428.3
B 5 185 228352 528.71 2009 1930 428.3
C 15 224 9937046 20076.67 1836 1817 494.9
C 12 2 1129429 2278.63 1836 1817 494.9
C 12 254 886291 1787.31 1836 1817 494.9
D 3 224 910558 1646.33 1968 1876 551.9
D 2 249 516061 931.59 1968 1876 551.9
D 2 153 489080 882.71 1968 1876 551.9

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