ASTROSAT CZTI

Data Quality Report

Orbit 55618

Creation date: 2026-01-08T13:00:27.166557
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_021T06_9000006538_55618cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55618cztM0_level2_quad_clean.evt
Size (bytes)2,518,701,120465,235,200
Size2.3 GB 443.7 MB
Events in quadrant A36,377,9632,697,126
Events in quadrant B14,766,3743,350,472
Events in quadrant C18,989,1992,933,467
Events in quadrant D20,477,0852,770,706

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320184
B0706904
C0826244
D0857404

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06920
B06920
C06920
D06920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A33956570616.804099%
B339562660.783367%
C339568832.600424%
D339578792.588568%

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 37606 33960 4932 4932 13.11% 14.52%
B 37606 33961 83 83 0.22% 0.24%
C 37606 33961 772 772 2.05% 2.27%
D 37607 33962 913 913 2.43% 2.69%

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 32 20924150 26316.67 3237 3164 795.0
A 8 249 1564215 1963.66 3237 3164 795.0
A 12 115 340871 424.8 3237 3164 795.0
B 5 185 442607 601.73 3444 3314 730.1
B 10 247 179799 241.74 3444 3314 730.1
B 0 199 119104 158.6 3444 3314 730.1
C 9 38 2476789 2700.06 3360 3321 916.1
C 12 2 1032807 1123.79 3360 3321 916.1
C 10 19 603062 654.68 3360 3321 916.1
D 8 245 2104942 2236.11 3349 3200 939.9
D 11 129 1452287 1541.73 3349 3200 939.9
D 8 160 591452 625.86 3349 3200 939.9

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