ASTROSAT CZTI

Data Quality Report

Orbit 52471

Creation date: 2025-06-26T14:27:40.879486
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/AS1A13_037T01_9000006476_52471cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52471cztM0_level2_quad_clean.evt
Size (bytes)2,863,157,760245,485,440
Size2.7 GB 234.1 MB
Events in quadrant A12,792,2022,091,355
Events in quadrant B14,658,8992,191,213
Events in quadrant C21,662,7241,631,706
Events in quadrant D55,169,9713,460

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0532784
B0589284
C0800444
D017907011

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04460
B04460
C04460
D04460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A220165932.693496%
B2201613786.259084%
C22016400018.168605%
D220152198599.863729%

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 25826 22021 344 344 1.33% 1.56%
B 25826 22021 761 761 2.95% 3.46%
C 25825 22019 3387 3387 13.12% 15.38%
D 25824 22014 20217 20217 78.29% 91.84%

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 8 249 2202128 3806.88 2379 2322 577.9
A 3 14 311669 535.34 2379 2322 577.9
A 11 3 193017 330.01 2379 2322 577.9
B 10 44 1448271 2927.99 2325 2237 493.9
B 10 254 1428058 2887.06 2325 2237 493.9
B 4 81 764213 1542.88 2325 2237 493.9
C 15 224 8803314 15630.43 2072 2050 563.1
C 4 5 1068078 1893.19 2072 2050 563.1
C 13 3 1042434 1847.65 2072 2050 563.1
D 15 93 50396448 365546.67 467 446 137.9
D 6 42 1665951 12080.72 467 446 137.9
D 2 153 218971 1585.07 467 446 137.9

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