ASTROSAT CZTI

Data Quality Report

Orbit 56291

Creation date: 2026-02-22T19:59:46.190480
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_049T01_9000006552_56291cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56291cztM0_level2_quad_clean.evt
Size (bytes)779,264,64069,410,880
Size743.2 MB 66.2 MB
Events in quadrant A14,108,610102,998
Events in quadrant B5,574,244522,275
Events in quadrant C4,635,217535,182
Events in quadrant D4,054,753514,926

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460661
B0208151
C0181031
D0161711

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6093522885.803381%
B6093118619.464960%
C60934557.467586%
D60932834.644674%

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 6912 6092 4834 4834 69.94% 79.35%
B 6913 6093 575 575 8.32% 9.44%
C 6913 6093 325 325 4.70% 5.33%
D 6913 6093 206 206 2.98% 3.38%

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 8016677 87973.6 358 348 91.1
A 4 95 2251304 24702.67 358 348 91.1
A 7 64 998427 10953.22 358 348 91.1
B 5 172 2291833 18030.99 591 570 127.1
B 5 185 308014 2419.42 591 570 127.1
B 1 159 149954 1175.57 591 570 127.1
C 12 254 1064744 6177.11 623 616 172.3
C 13 3 576601 3343.51 623 616 172.3
C 12 252 229387 1327.98 623 616 172.3
D 8 129 322940 1799.93 636 608 179.1
D 12 31 282769 1575.62 636 608 179.1
D 2 249 222771 1240.58 636 608 179.1

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