ASTROSAT CZTI

Data Quality Report

Orbit 20191101_T03_145T01_9000003278_level2

Creation date: 2025-12-04T22:21:38.750569
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/AS1T03_145T01_9000003278cztM0_level2.fits modeM0/AS1T03_145T01_9000003278cztM0_level2_quad_clean.evt
Size (bytes)1,938,611,5201,654,994,880
Size1.8 GB 1.5 GB
Events in quadrant A12,142,8169,789,156
Events in quadrant B11,607,2249,800,983
Events in quadrant C11,840,4569,279,901
Events in quadrant D9,995,7828,128,699

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03991800
B04087180
C04070670
D05214950

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A038980
B038980
C038980
D038980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03320
B03330
C03330
D03330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19156920311.060192%
B19156828451.485112%
C19156833101.727846%
D191567132846.934388%

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 235152 191569 0 0 0.00% 0.00%
B 235151 191561 0 0 0.00% 0.00%
C 235151 191566 0 0 0.00% 0.00%
D 235150 190835 0 0 0.00% 0.00%

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 0 29 11518 11.1 3162 2976 769.3
A 7 110 9650 8.68 3162 2976 769.3
A 0 30 9186 8.07 3162 2976 769.3
B 2 9 9372 10.83 3074 2942 593.8
B 2 8 7730 8.06 3074 2942 593.8
B 5 128 7644 7.92 3074 2942 593.8
C 1 81 8938 7.55 3126 2937 794.4
C 1 80 8923 7.54 3126 2937 794.4
C 3 234 8147 6.56 3126 2937 794.4
D 3 14 7279 6.24 2858 2620 746.0
D 10 189 7177 6.11 2858 2620 746.0
D 6 231 7076 5.97 2858 2620 746.0

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