ASTROSAT CZTI

Data Quality Report

Orbit 18521

Creation date: 2024-06-27T17:50:56.757248
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/AS1A05_187T03_9000002748_18521cztM0_level2.evt modeM0/AS1A05_187T03_9000002748_18521cztM0_level2_quad_clean.evt
Size (bytes)1,477,480,320224,138,880
Size1.4 GB 213.8 MB
Events in quadrant A11,483,8281,395,044
Events in quadrant B9,087,5821,439,561
Events in quadrant C9,593,4611,371,648
Events in quadrant D13,317,3751,292,993

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0462974
B0389534
C0400084
D0520364

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1871111526.156806%
B187113721.988135%
C187113651.950724%
D1871115698.385442%

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 20791 18711 691 691 3.32% 3.69%
B 20791 18711 29 29 0.14% 0.15%
C 20791 18711 3 3 0.01% 0.02%
D 20791 18712 898 898 4.32% 4.80%

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 13 2814657 6233.43 2227 2176 451.2
A 15 192 72970 156.9 2227 2176 451.2
A 13 254 24834 50.22 2227 2176 451.2
B 3 64 128588 291.56 2262 2204 433.5
B 15 222 61485 136.76 2262 2204 433.5
B 12 111 53818 119.07 2262 2204 433.5
C 3 233 770920 1499.11 2170 2186 512.8
C 14 238 334018 647.11 2170 2186 512.8
C 9 54 25344 45.16 2170 2186 512.8
D 7 238 2748593 5275.6 2119 2055 520.6
D 1 52 2334448 4480.1 2119 2055 520.6
D 13 168 135845 256.99 2119 2055 520.6

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