ASTROSAT CZTI

Data Quality Report

Orbit 56258

Creation date: 2026-02-20T13:05:42.772162
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_56258cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56258cztM0_level2_quad_clean.evt
Size (bytes)742,314,24086,120,640
Size707.9 MB 82.1 MB
Events in quadrant A14,359,156245,889
Events in quadrant B3,493,447700,450
Events in quadrant C4,165,796621,449
Events in quadrant D4,939,068572,165

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0472592
B0149262
C0170992
D0193242

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6708458468.336315%
B67082012.996422%
C67092583.845581%
D67093054.546132%

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 8808 6710 3945 3945 44.79% 58.79%
B 8808 6709 25 25 0.28% 0.37%
C 8809 6711 128 128 1.45% 1.91%
D 8809 6711 227 227 2.58% 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 4299811 32855.19 532 519 130.9
A 8 176 3433937 26238.18 532 519 130.9
A 12 115 2347599 17936.39 532 519 130.9
B 5 185 175033 1103.96 740 713 157.9
B 0 63 130898 824.45 740 713 157.9
B 10 247 51437 321.23 740 713 157.9
C 12 254 574423 2911.51 729 723 197.0
C 13 3 300686 1522.31 729 723 197.0
C 12 252 234712 1187.49 729 723 197.0
D 8 129 497108 2466.1 715 683 201.3
D 8 160 387715 1922.67 715 683 201.3
D 2 249 373249 1850.8 715 683 201.3

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