ASTROSAT CZTI

Data Quality Report

Orbit 55535

Creation date: 2026-01-03T09:19:05.338795
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_099T01_9000006536_55535cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55535cztM0_level2_quad_clean.evt
Size (bytes)451,100,16088,174,080
Size430.2 MB 84.1 MB
Events in quadrant A2,848,499591,685
Events in quadrant B3,152,435630,581
Events in quadrant C4,568,400521,103
Events in quadrant D5,651,106497,076

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129051
B0136511
C0179412
D0210261

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6149580.943243%
B61491011.642544%
C61494697.627256%
D61495338.668076%

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 7139 6150 1 1 0.01% 0.02%
B 7139 6150 32 32 0.45% 0.52%
C 7139 6150 295 295 4.13% 4.80%
D 7139 6150 500 500 7.00% 8.13%

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 6 161 125085 773.62 647 631 160.9
A 3 14 78399 483.42 647 631 160.9
A 4 3 40042 244.98 647 631 160.9
B 5 236 240519 1770.08 635 613 135.5
B 0 171 142294 1045.35 635 613 135.5
B 10 247 50823 370.46 635 613 135.5
C 9 38 1698182 10214.37 608 603 166.2
C 15 178 257654 1546.68 608 603 166.2
C 14 254 88432 528.47 608 603 166.2
D 11 129 2085154 12077.19 608 580 172.6
D 6 239 290773 1681.26 608 580 172.6
D 2 153 240882 1392.21 608 580 172.6

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