ASTROSAT CZTI

Data Quality Report

Orbit 59257

Creation date: 2026-09-10T07:11:07.233568
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/AS1T05_271T01_9000006604_59257cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59257cztM0_level2_quad_clean.evt
Size (bytes)446,791,680107,547,840
Size426.1 MB 102.6 MB
Events in quadrant A4,138,468699,347
Events in quadrant B3,684,914753,113
Events in quadrant C3,578,802681,282
Events in quadrant D4,570,869616,854

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173102
B0163612
C0161362
D0189342

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72721241.705171%
B72721632.241474%
C72721071.471397%
D72723304.537954%

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 8847 7274 84 84 0.95% 1.15%
B 8847 7274 76 76 0.86% 1.04%
C 8847 7274 101 101 1.14% 1.39%
D 8847 7274 285 285 3.22% 3.92%

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 15 233 360737 1853.71 791 771 194.2
A 0 128 259110 1330.36 791 771 194.2
A 3 14 208345 1068.94 791 771 194.2
B 4 236 320374 1858.03 791 761 172.0
B 4 201 67836 389.93 791 761 172.0
B 10 247 62506 358.95 791 761 172.0
C 12 252 467793 2155.72 788 781 216.6
C 14 254 17245 76.0 788 781 216.6
C 14 96 6960 28.52 788 781 216.6
D 2 249 676102 3129.11 763 726 215.8
D 7 238 232379 1073.28 763 726 215.8
D 3 160 230071 1062.59 763 726 215.8

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

TCT plots

Parameter TCT0 TCT_healed
Tct