ASTROSAT CZTI

Data Quality Report

Orbit 55959

Creation date: 2026-02-06T01:11:40.095867
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_066T02_9000006546_55959cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55959cztM0_level2_quad_clean.evt
Size (bytes)3,463,960,320572,734,080
Size3.2 GB 546.2 MB
Events in quadrant A29,418,3803,812,295
Events in quadrant B22,480,7874,176,637
Events in quadrant C24,057,6713,627,189
Events in quadrant D49,035,6812,848,310

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0680
B0680
C0680
D0680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011772213
B0968977
C01040647
D01748727

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08540
B08540
C08540
D08540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4188217324.135428%
B418838722.081990%
C4188418184.340560%
D41884932022.251934%

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 48729 41890 1538 1538 3.16% 3.67%
B 48730 41891 457 457 0.94% 1.09%
C 48730 41891 1495 1495 3.07% 3.57%
D 48730 41891 8895 8895 18.25% 21.23%

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 12 115 9340462 8687.8 4377 4256 1074.6
A 7 64 1247898 1157.27 4377 4256 1074.6
A 3 14 667205 616.91 4377 4256 1074.6
B 2 249 1185330 1278.28 4391 4231 924.0
B 9 251 1094167 1179.61 4391 4231 924.0
B 0 171 652764 701.89 4391 4231 924.0
C 13 3 3769508 3245.97 4247 4214 1160.0
C 1 29 1232451 1058.83 4247 4214 1160.0
C 15 193 543183 464.63 4247 4214 1160.0
D 11 129 28473491 25614.46 3921 3751 1111.5
D 2 62 3406299 3061.3 3921 3751 1111.5
D 3 12 621201 555.52 3921 3751 1111.5

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