ASTROSAT CZTI

Data Quality Report

Orbit 54976

Creation date: 2025-11-26T08:13:28.209995
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_014T01_9000006528_54976cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54976cztM0_level2_quad_clean.evt
Size (bytes)1,244,056,320107,472,960
Size1.2 GB 102.5 MB
Events in quadrant A8,232,828744,388
Events in quadrant B4,709,258963,180
Events in quadrant C6,226,125831,527
Events in quadrant D26,113,96527,417

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0319091
B0217531
C0259361
D0841771

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02000
B02000
C02000
D02000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9918170817.221214%
B99182472.490421%
C99196216.260712%
D9919965397.318278%

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 9988 9919 1391 1391 13.93% 14.02%
B 9988 9919 25 25 0.25% 0.25%
C 9989 9920 435 435 4.35% 4.39%
D 9988 9918 9210 9210 92.21% 92.86%

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 4015701 17054.12 945 921 235.4
A 4 249 143763 606.77 945 921 235.4
A 13 248 141894 598.83 945 921 235.4
B 4 81 191142 862.63 1030 995 220.4
B 0 182 177408 800.33 1030 995 220.4
B 10 247 88718 397.97 1030 995 220.4
C 4 5 1628410 5982.85 995 988 272.0
C 13 3 207497 759.18 995 988 272.0
C 6 223 157845 576.65 995 988 272.0
D 15 94 22551857 230473.13 333 318 97.8
D 2 249 788966 8059.86 333 318 97.8
D 2 172 438949 4482.74 333 318 97.8

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