ASTROSAT CZTI

Data Quality Report

Orbit 56797

Creation date: 2026-03-28T19:11:01.926372
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_083T03_9000006562_56797cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56797cztM0_level2_quad_clean.evt
Size (bytes)535,734,72096,520,320
Size510.9 MB 92.0 MB
Events in quadrant A3,212,619667,371
Events in quadrant B4,762,400680,077
Events in quadrant C7,743,295509,960
Events in quadrant D3,592,114598,261

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143801
B0187961
C0275802
D0152651

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66971171.747051%
B66985398.047178%
C6697159723.846498%
D66971432.135284%

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 7802 6697 40 40 0.51% 0.60%
B 7803 6698 266 266 3.41% 3.97%
C 7801 6696 1557 1557 19.96% 23.25%
D 7802 6697 100 100 1.28% 1.49%

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 10 251 237304 1300.45 745 730 181.9
A 7 255 42377 228.93 745 730 181.9
A 3 62 19501 103.18 745 730 181.9
B 4 206 981055 6414.51 711 684 152.8
B 2 249 299870 1957.56 711 684 152.8
B 8 128 286069 1867.26 711 684 152.8
C 15 230 2254083 12758.27 642 633 176.6
C 13 3 2088379 11820.11 642 633 176.6
C 9 38 453642 2564.78 642 633 176.6
D 2 249 335620 1673.81 719 688 200.1
D 2 31 120190 597.21 719 688 200.1
D 8 160 107832 535.45 719 688 200.1

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