ASTROSAT CZTI

Data Quality Report

Orbit 57181

Creation date: 2026-04-23T16:16:31.916438
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_070T08_9000006568_57181cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57181cztM0_level2_quad_clean.evt
Size (bytes)599,788,80099,115,200
Size572.0 MB 94.5 MB
Events in quadrant A3,067,100682,981
Events in quadrant B3,500,419736,093
Events in quadrant C7,041,480565,828
Events in quadrant D8,029,145510,174

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147900
B0156990
C0261000
D0288300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7263190.261600%
B72631021.404378%
C7263119716.480793%
D7263138019.000413%

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 7263 7263 4 4 0.06% 0.06%
B 7263 7263 36 36 0.50% 0.50%
C 7263 7263 938 938 12.91% 12.91%
D 7263 7263 1310 1310 18.04% 18.04%

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 62 26518 133.62 772 752 192.8
A 10 251 23410 117.5 772 752 192.8
A 3 14 17763 88.22 772 752 192.8
B 5 185 129700 798.89 763 734 161.4
B 2 249 86668 532.32 763 734 161.4
B 0 213 72976 447.51 763 734 161.4
C 15 224 4158984 21781.05 698 690 190.9
C 14 246 58521 302.92 698 690 190.9
C 14 254 27505 140.46 698 690 190.9
D 12 33 4034031 20703.73 686 651 194.8
D 2 249 857817 4399.92 686 651 194.8
D 8 240 312568 1601.1 686 651 194.8

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